automatic a/c-heater system - technosolution.eu

AUTOMATIC A/C-HEATER SYSTEM

2000-01 AUTOMATIC A/C-HEATER SYSTEMS

S40 & V40

SPECIFICATIONS

SPECIFICATIONS Application Specification

Compressor Type .......................................... (1) ZexelCompressor Belt Tension ........................................ (2)System Oil Capacity ................................... (3) 6.0 ozs.Refrigerant (R-134a) Capacity ............................ 30.0 ozs.System Operating Pressures (4) High Side ......................... 247-334 psi (18.0-23.5 kg/cm²) Low Side ........................ 58.0-73.0 psi (4.08-5.13 kg/cm²)

(1) - Check underhood A/C specification label.(2) - Belt tension is maintained by automatic belt tensioner.(3) - Use PAG Oil (Part No. 11 61 407-0).(4) - Measured at 86° (30°C) ambient temperature. Lowest reading is with low humidity; highest reading is with high humidity.

WARNING: To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article in GENERAL SERVICING.

NOTE: Obtain radio anti-theft code from vehicle owner before disconnecting negative battery cable. Radio anti-theft code must be re-entered into radio once negative battery cable is reconnected. To re-enter radio anti-theft code, turn ignition and radio on. When input CODE **** is displayed on radio, re-enter radio anti-theft code by using 1-20/DISC knob.

DESCRIPTION

The Electronic Climate Control (ECC) module (A/C-heatercontrol panel) contains a function selector dial, temperature dial, arecirculated air switch, AC ON and OFF switch, and a fan speed (blowermotor) control dial. See Fig. 1. Air conditioning system will onlyoperate above 32°F (0°C). Compressor will not engage when blowerswitch is in zero position.

Additional system components include sun sensor, outsidetemperature sensor, low-pressure switch, 3 damper motors, pressuresensor, engine coolant temperature sensor, evaporator temperaturesensor and A/C relay. See Figs. 2 and 3.

Fig. 1: Identifying ECC Control PanelCourtesy of Volvo Cars of North America.

Fig. 2: Identifying ECC Sensor LocationsCourtesy of Volvo Cars of North America.

Fig. 3: Locating Damper MotorsCourtesy of Volvo Cars of North America.

determines when compressor is on and off.

AIR DISTRIBUTION CONTROL

Air distribution control is based on signals from ECC controlmodule, which controls the ventilation and floor/defroster dampermotor. When set to AUT (automatic) mode, the air distribution controlcircuit computes air distribution based on outside (ambient)temperature, the position of temperature control dial, and enginecoolant temperature.

At low outside temperatures, the ECC control module selectsfloor/defrost setting, with a slight amount of bi-level air ifsunshine is present. If outside temperature is between 50-66°F (10-19°C), a varying degree of bi-level air is selected. At temperaturesgreater than 68°F (20°C), all air is directed to instrument panelvents.

The ventilation air distribution setting is selected ifcontrol panel is set for maximum cooling. The floor/defrost setting isselected if maximum heating is selected. The defrost air distributionsetting is selected if engine is cold and outside and interiortemperatures are also low. This changes to varying degrees offloor/defrost air distribution as engine coolant temperatureincreases. The transition from defroster to floor/defroster settingtakes place more quickly in sunshine.

OUTSIDE TEMPERATURE SENSOR & SOLAR SENSOR

An outside temperature sensor is located next to evaporator.See Fig. 2. Resistance of air temperature sensor decreases astemperature increases. The solar sensor, mounted in passenger sidespeaker grill, is a photodiode which generates a current when exposedto solar radiation.

DAMPER MOTORS

Damper motors are all identical. Their control range variesaccording to the damper being controlled. Temperature control damperand floor/defroster/ventilation damper motors have a position sensorto enable the ECC control module to determine damper position, learndamper limit positions and to detect any fault in damper motorcircuit.

FAN CONTROL

Fan speed is variably controlled by ECC output (power) stagein response to signals from ECC control module. The ECC control moduledigital control signals vary in length according to required fanspeed.

The ECC output stage has an electronic unit which receivesthe digital control signals and converts them to voltage. If there isno control signal or the fan is disabled, the ECC output stage sends adiagnostic signal to inform the ECC control module of the fault.

If fan speed control lever is set to AUT (automatic) mode,fan speed is influenced by the position of temperature control dial,passenger compartment temperature sensor, vehicle speed and enginecoolant temperature.

The highest fan speed is selected if temperature control dialis set to maximum or minimum cooling or heating. The greater thedifference between the desired and actual temperatures, as sensed bythe temperature sensor, the higher the fan speed.

As vehicle speed increases, the fan speed will be reduced tomaintain a constant airflow throughout the passenger compartment. Whenheating the passenger compartment after starting a cold engine, thefan speed is gradually increased as engine coolant temperature rises.

OPERATION

A/C COMPRESSOR CLUTCH CONTROL

A/C compressor electromagnetic clutch is activated by enginemanagement system. ECC control module requests activation using an A/Cselected signal to engine management system via low-pressure switch.Engine management system determines when compressor should run basedon this signal, engine temperature signal, accelerator position andpressure signal from pressure sensor. Low temperature switch

Recirculation Motor This motor operates the recirculation damper by means of amechanical linkage in response to signals from ECC control module.

Recirculation Switch The off position of recirculation switch corresponds toautomatic operation. The ECC control module determines whetherrecirculation is required.

Air Distribution Switch With air distribution switch in defroster position,recirculated air mode always cuts out, because humidity in passengercompartment is normally higher than that of outside air.

Recirculation Damper In AUT (automatic) mode, recirculation damper movement islimited to fractions of a second. It takes about half a minute fromfull recirculation to take effect, if outside temperature is high.

TEMPERATURE CONTROL

ECC control module computes temperature control damper motorposition based on inputs from temperature dial settings, passengercompartment temperature sensor, solar sensor, engine coolanttemperature sensor and outside (ambient) temperature sensor.

The difference between the desired and actual interiortemperature, as monitored by passenger compartment temperature sensor,has a direct effect on temperature control damper positions.

In direct sunlight, the temperature control dampers arepositioned to provide a lower temperature, as determined by solarsensor input. If the engine is cold and outside temperature is low,the temperature control dampers are set for more heat to reach thedesired temperature faster.

ADJUSTMENTS

AIR DISTRIBUTION DAMPER MOTOR LINKAGE

Disconnect lever from motor. Connect battery voltage toterminals No. 2 (Gray wire) and 6 (Red wire). Motor should move leverto zero position. Disconnect battery voltage. Position damper in zeroposition and lock in place with pin. See Fig. 4. Adjust control armand install. Remove pin. Connect harness connector.

Fig. 4: Adjusting Air Distribution Damper MotorCourtesy of Volvo Cars of North America.

RECIRCULATED AIR MODE

The ECC control module selects recirculated air mode only fora combination of cooling and high outside temperature, provided that:

* There is a considerable difference between the desired and actual temperature. The quantity of recirculated air will vary between 70-100 percent, depending on difference in temperature.

* A high fan speed is manually selected. In this case, the recirculation damper will be set to a mid-position (50 percent of the air will be recirculated).

terminals No. 2 (Pink wire) and 6 (Blue/Green wire). Motor should movelever to zero position. Disconnect battery voltage. Position damper inzero position and lock in place with pin. See Fig. 5. Adjust controlarm and install. Remove pin. Connect harness connector.

5: Adjusting Temperature Damper MotorCourtesy of Volvo Cars of North America.

DAMPER MOTOR LIMIT POSITION SELF-ADJUSTMENT

NOTE: During self-adjustment program, ECC control module runs damper motors to their limit positions. It then stores value returned from position sensor and can control motor between limit positions during normal system operation.

Damper motor limit position self-adjustment is necessaryafter replacing ECC control module or damper motor, or afterdisconnecting damper motor or linkage.

Adjustment Procedure Turn ignition on. Place blower fan switch in any positionother than AUT or "0". Place air distribution switch in AUT positionand REC button in on position. Self-adjustment function is activated.During self-adjustment, A/C switch on LED will blink for 15 seconds.Blinking stops when self-adjustment is completed.

SELF-DIAGNOSTICS

The Electronic Climate Control (ECC) module can detect faultsin system and store Diagnostic Trouble Codes (DTCs). If a fault ispresent, system informs driver by flashing AC OFF indicator light for20 seconds.

TEMPERATURE DAMPER MOTOR LINKAGE

Disconnect lever from motor. Connect battery voltage to

121 ......... Outside Temp. Sensor, Open Circuit Or Short Circuit ToGround122 ....... Outside Temp. Sensor, Short Circuit To Reference Voltage123 ...... Passenger Compartment Temp. Sensor, Open Circuit Or Short Circuit To Ground124 ........... Passenger Compartment Temp. Sensor, Short Circuit To Supply Voltage135 ............ ECT Sensor, Open Circuit Or Short Circuit To Ground136 ................. ECT Sensor, Short Circuit To Reference Voltage137 ...... Evaporator Temp. Sensor, Open Circuit Or Short Circuit To Ground138 .... Evaporator Temp. Sensor, Short Circuit To Reference Voltage139 .................................... Generator D+ Signal Missing140 ............................ Speedometer Signal, Signal Too High211 .... Temp. Damper Motor Position Sensor, Short Circuit To Ground212 ...... Temp. Damper Motor Position Sensor, Open Circuit Or Short Circuit To Supply Voltage221 ........... Air Distribution Damper Motor Position Sensor, Short Circuit To Ground222 ............ Air Distribution Damper Motor Position Sensor, Open Circuit Or Short Circuit To Supply Voltage311 .......... Temp. Damper Motor, Short Circuit To Ground Or Supply Voltage312 ............ Temp. Damper Motor, Open Circuit Or Active Too Long321 ...... Air Distribution Damper Motor, Short Circuit To Ground Or Supply Voltage322 ...... Air Distribution Damper Motor, Open Circuit Or Active Too Long323 ......... Recirculation Damper Motor, Short Circuit To Ground Or Supply Voltage411 ............................... Blower Fan Motor, Signal Missing412 ...................... Blower Fan Motor, Short Circuit To Ground421 ............................... Blower Fan Relay, Signal Missing422 .............. Blower Fan Relay, Short Circuit To Supply Voltage431 ................. Blower Fan Speed Selector Switch, Open Circuit432 ...... Blower Fan Speed Selector Switch, Short Circuit To Ground433 ....................... Blower Fan Motor, Overcurrent Or Blocked440 ............................. ECC Control Module, Internal Fault

DIAGNOSTIC TROUBLE CODES (2001 MODELS) DTC Condition/Affected Circuit

0006 ............................ Temp. Damper Motor Position Sensor0007 ............................ Temp. Damper Motor Position Sensor000A ................. Air Distribution Damper Motor Position Sensor000B ................. Air Distribution Damper Motor Position Sensor0012 ............................................ Temp. Damper Motor0013 ................................. Air Distribution Damper Motor001B .............................................. Blower Fan Motor001F .............................................. Blower Fan Motor0020 ............................... Blower Fan Speed Control Module0021 ............................... Blower Fan Speed Control Module0045 .............................................. Blower Fan Relay0046 .............................................. Blower Fan Relay0063 .............................................. A/C, ECC Request0064 .............................................. A/C, ECC Request0065 .............................. Temp./Recirculation Damper Motor0067 .................................... Recirculation Damper Motor0068 .................................... Recirculation Damper Motor0071 ........................... Temp./Air Distribution Damper Motor0073 ................................. Air Distribution Damper Motor0079 .................................................... ECT Sensor007A .................................................... ECT Sensor007C ....................................... Evaporator Temp. Sensor007D ....................................... Evaporator Temp. Sensor007E .......................................... Outside Temp. Sensor007F .......................................... Outside Temp. Sensor0080 ................................. Air Distribution Damper Motor0081 ............................................ Temp. Damper Motor0085 ............................................... 30-Power Supply0087 .................................................... A/C Switch0088 .................................................... REC Switch008B ............................ Passenger Compartment Temp. Sensor

RETRIEVING DIAGNOSTIC TROUBLE CODES

Diagnostic Trouble Codes (DTCs) can be retrieved using VolvoCommunication Tool 2000 (VCT 2000). Connect scan tool to Data LinkConnector (DLC) located on driver's side of center console. See Fig. 6. Follow scan tool manufacturer's instructions for retrievingDiagnostic Trouble Codes (DTCs). SeeDIAGNOSTIC TROUBLE CODES (2000 MODELS) orDIAGNOSTIC TROUBLE CODES (2001 MODELS) table.

NOTE: Generic scan tool may not be able to perform all diagnostic functions.

DIAGNOSTIC TROUBLE CODES (2000 MODELS) DTC Condition/Affected Circuit

Fig. 6: Identifying DLC LocationCourtesy of Volvo Cars of North America.

CLEARING DIAGNOSTIC TROUBLE CODES

Follow scan tool manufacturer's instructions to erase DTCs.If display shows 111, DTCs have been erased/cleared. If a DTC will noterase/clear, perform that particular diagnosis again.

DIAGNOSTIC TESTS (2000 MODELS)

DTC 121: OUTSIDE TEMPERATURE SENSOR

Condition DTC 121 is set when ECC control module detects that outsidetemperature sensor signal is missing or there is a short-circuit toground in signal cable.

Possible Cause* Open circuit in outside temperature sensor or harness.* Short circuit to ground in harness.

DTC 122: OUTSIDE TEMPERATURE SENSOR

Condition DTC 122 is stored when ECC control module detects a shortcircuit in supply voltage circuit in outside temperature sensorharness.

Possible Cause* Short circuit in outside temperature sensor.* Short circuit in reference voltage circuit between

outside temperature sensor and ECC control module.

DTC 123: INTERIOR TEMPERATURE SENSOR

Condition DTC 123 is set when ECC control module detects that there isno interior temperature sensor signal or short circuit to ground inharness.

Possible Cause* Open circuit in interior temperature sensor.* Short circuit to ground in interior temperature sensor.

Condition DTC 124 is set when ECC control module detects a shortcircuit in supply voltage circuit of interior temperature sensorharness.

Possible Cause* Short circuit in interior temperature sensor supply

voltage circuit.

DTC 135: COOLANT TEMPERATURE SENSOR

Condition DTC 135 is set when ECC control module detects that enginecoolant temperature sensor signal is missing or there is a shortcircuit to ground in harness.

Possible Cause* Open circuit in engine coolant temperature sensor or

harness.* Short circuit to ground in harness.

DTC 136: COOLANT TEMPERATURE SENSOR

Condition DTC 136 is set when ECC control module detects a shortcircuit in engine coolant temperature supply voltage circuit.

Possible Cause* Short circuit in engine coolant temperature sensor.* Short circuit in supply voltage circuit between engine

coolant temperature sensor and ECC control module.

DTC 137: EVAPORATOR TEMPERATURE SENSOR

Condition DTC 137 is set when ECC control module detects thatevaporator sensor signal is missing or there is a short circuit toground in harness.

Possible Cause* Open circuit in evaporator sensor or harness.* Short circuit to ground in sensor harness.

DTC 138: EVAPORATOR TEMPERATURE SENSOR

Condition DTC 138 is set when ECC control module detects a shortcircuit in evaporator sensor supply voltage circuit.

Possible Cause* Short circuit in evaporator sensor.* Short circuit in supply voltage circuit between evaporator

sensor and ECC control module.

DTC 139: GENERATOR (D+) SIGNAL

Condition DTC 139 is set when ECC control module detects no voltagefrom generator (GEN) D+ signal. DTC is only stored if vehicle speed isabove 31 MPH.

Possible Cause* Open circuit in harness between generator (GEN) D+

connection and ECC control module.

DTC 140: SPEEDOMETER SIGNAL

Condition DTC 140 is set when ECC control module detects vehicle speedsignal from combined instrument panel is 155 MPH or greater for aprolonged period of time.

Possible Cause* Defective engine speed (RPM) sensor.* Defective speedometer/combined instrument panel.

DTC 124: INTERIOR TEMPERATURE SENSOR

Possible Cause* Short circuit to ground in harness.

DTC 212: TEMPERATURE DAMPER MOTOR POSITION SENSOR

Condition DTC 212 is set if ECC control module detects a short circuitin temperature damper motor position sensor supply voltage circuit orsignal is missing.

Possible Cause* Open circuit between damper motor potentiometer and

ECC control module.* Open circuit in potentiometer.* Short circuit in supply voltage circuit.

DTC 221: AIR DISTRIBUTION DAMPER MOTOR POSITION SENSOR

Condition DTC 221 is set when ECC control module detects a shortcircuit to ground in air distribution damper motor position sensorharness.

Possible Cause* Short circuit to ground in harness.

DTC 222: AIR DISTRIBUTION DAMPER MOTOR POSITION SENSOR

Condition DTC 222 is set when ECC control module detects a shortcircuit in air distribution damper motor position sensor supplyvoltage circuit or signal is missing.

Possible Cause* Open circuit between damper motor potentiometer and

ECC control module.* Open circuit in potentiometer.* Short circuit in supply voltage circuit.

DTC 311: TEMPERATURE DAMPER MOTOR

Condition DTC 311 is set when ECC control module detects low powersupply voltage from ECC control module to temperature damper motor.

Possible Cause* Short circuit in power supply circuit to temperature

damper motor.


Condition DTC 312 is set when ECC control module detects signal totemperature damper motor is not within correct value parameter within12 seconds.

Possible Cause* Temperature damper motor binding.

DTC 321: AIR DISTRIBUTION DAMPER MOTOR

Condition DTC 321 is set when ECC control module detects low powersupply voltage from ECC control module to air distribution dampermotor.

Possible Cause* Short circuit in power supply circuit to air distribution

damper motor.


Condition DTC 322 is set when ECC control module detects signal to airdistribution damper motor is not within correct value parameter within12 seconds.

Possible Cause* Temperature damper motor binding.


Condition DTC 211 is set when ECC control module detects a shortcircuit to ground in temperature damper motor position sensor harness.

Condition DTC 323 is set when ECC control module detects low powersupply voltage from ECC control module to recirculation damper motor.

Possible Cause* Short circuit in power supply circuit to recirculation

damper motor.

DTC 411: BLOWER FAN MOTOR

Condition DTC 411 is set if fan motor control signal is missing or isfaulty.

Possible Cause* Fault in blower fan speed control unit circuit.* Open circuit in harness between ECC control module

and blower fan speed control unit.* Fault in blower fan motor.


Condition DTC 412 is set when ECC control module detects control signalis incorrect.

Possible Cause* Short circuit to ground in harness between terminal

No. 28 on ECC control module and terminal No. 3 on blower fan motor speed regulator.

* Fault in blower fan speed control unit.

DTC 421: FAN RELAY

Condition DTC 421 is set when ECC control module detects no voltage.

Possible Cause* Fault in blower fan relay.* Open circuit in harness between terminal No. 29 on

ECC control module and terminal No. 3 on maximum speed blower fan relay.

* Fault in blower fan motor.

DTC 422: FAN RELAY

Condition DTC 422 is set if ECC control module detects power supplyvoltage is incorrect.

Possible Cause* Short circuit in harness between terminal No. 29 on

ECC control module and terminal No. 3 on maximum speed blower fan relay.

DTC 431: BLOWER FAN SWITCH

Condition DTC 431 is set if ECC control module detects no signal fromblower fan switch.

Possible Cause* Open circuit between blower fan switch and ECC control

module.* Internal fault in ECC control module.

DTC 432: BLOWER FAN SWITCH

Condition DTC 432 is set when ECC control module detects a shortcircuit to ground in harness from blower fan switch.

Possible Cause* Short circuit to ground between blower fan switch and

ECC control module.* Internal fault in ECC control module.

DTC 323: RECIRCULATION DAMPER MOTOR

is drawing excessive current.

Possible Cause* Fault in blower motor.

DTC 440: ECC CONTROL MODULE

Condition DTC 440 is stored when ECC control module detects internalsignals are incorrect.

Possible Cause* Fault in ECC control module.

DIAGNOSTIC TEST (2001 MODELS)


Condition DTC 0006 is set when climate control module detects thattemperature damper motor position sensor signal is less thanapproximately 0.25 volts (5% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in position sensor power supply circuit.* Open circuit in position sensor signal circuit.* Short circuit to ground in position sensor power supply

circuit.* Short circuit to ground in position sensor signal circuit.* Defective damper motor.


Condition DTC 0007 is set when climate control module detects thattemperature damper motor position sensor signal is greater thanapproximately 4.75 volts (95% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open or short circuit in ground lead.* Short circuit to supply voltage in position sensor

harness.* Defective damper motor.

DTC 000A: AIR DISTRIBUTION DAMPER MOTOR POSITION SENSOR

Condition DTC 000A is set when climate control module detects that airdistribution damper motor position sensor signal is less thanapproximately 0.25 volts (5% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in position sensor power supply circuit.* Open circuit in position sensor signal circuit.* Short circuit to ground in position sensor power supply

circuit.* Short circuit to ground in position sensor signal circuit.* Defective damper motor.

DTC 000B: AIR DISTRIBUTION DAMPER MOTOR POSITION SENSOR

Condition DTC 000B is set when climate control module detects that airdistribution damper motor position sensor signal is greater thanapproximately 4.75 volts (95% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open or short circuit in ground lead.* Short circuit to supply voltage in position sensor harness.* Defective damper motor.


Condition DTC 0012 is set when climate control module detects thattemperature damper motor is on and damper motor position sensor hasnot changed position after 6 minutes.


Condition DTC 433 is set if ECC control module detects blower fan motor

Possible Cause* Blocked damper motor.* Defective damper motor.


Condition DTC 0013 is set when climate control module detects that airdistribution damper motor is on and damper motor position sensor hasnot changed position after 6 minutes.

Possible Cause* Blocked damper motor.* Defective damper motor.

DTC 001B: BLOWER FAN MOTOR

Condition DTC 001B is set when climate control module detects thatdiagnostic signal from blower fan motor is less than 1.3 volts formore than 8 seconds when blower fan motor is on, but not set tomaximum position.

Possible Cause* Short circuit to ground in motor harness.* Defective power stage for blower fan motor.* Defective maximum relay for blower fan motor.

DTC 001F: BLOWER FAN MOTOR

Condition DTC 001F is set when climate control module detects thatdiagnostic signal from blower fan motor is high for more than 2seconds when blower fan motor is on.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in diagnostic signal circuit.* Open circuit in blower motor ground.* Short circuit to diagnostic signal supply voltage circuit.* Defective fan speed control module.

DTC 0020: BLOWER FAN SPEED CONTROL MODULE

Condition DTC 0020 is set when climate control module detects thatsignal for blower fan speed is greater than 4.8 volts for more than 3seconds when blower fan is on.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in signal circuit.* Short circuit to supply voltage in signal circuit.* Defective fan speed control module.

DTC 0021: BLOWER FAN SPEED CONTROL MODULE

Condition DTC 0021 is set if climate control module detects that fanspeed control module signal is less than 0.5 volts for more than 8seconds when blower fan is on.

Possible Cause* Short circuit to ground in signal circuit.* Defective fan speed control module.

DTC 0045: BLOWER FAN RELAY

Condition DTC 0045 is set when climate control module detects thatblower fan relay signal for maximum fan speed is high for more than 6seconds and fan speed selector is in full speed position.

Possible Cause* Short circuit to supply voltage in signal circuit.* Defective blower fan relay.


Condition DTC 0046 is set when climate control system detects thatblower fan relay signal for maximum fan speed is low for more than 6 second and fan speed selector is full speed selection.


Condition DTC 0012 is set when climate control module detects thattemperature damper motor is on and damper motor position sensor hasnot changed position after 6 minutes.

seconds, although blower fan relay has not been activated by controlmodule.

Possible Cause* Defective fuse No. 1 (25-amp) or fuse No. 12 (15-amp)

in integrated relay/fuse box, in passenger compartment.* Terminal contact resistance or oxidation.* Open or short circuit to ground in harness between

fuse box and blower fan relay.* Open or short circuit to ground in harness between

blower fan relay and climate control module.* Open circuit in ground circuit for A/C system relay.* Open circuit in power supply circuit for A/C system relay.* Defective A/C system relay.* Defective blower maximum speed fan relay.

DTC 0063: A/C, ECC REQUEST

Condition DTC 0063 is set when climate control module detects that ECMA/C request signal is low when AC is on.

Possible Cause* Short circuit to ground in signal circuit.

DTC 0064: A/C, ECC REQUEST

Condition DTC 0064 is set when climate control module detects that ECMA/C request signal is high when AC is not on.

Possible Cause* Short circuit to supply voltage in signal circuit.

DTC 0065: TEMPERATURE/RECIRCULATION DAMPER MOTOR

Condition DTC 0065 is set when climate control module detectsrecirculation positive damper motor power supply or temperaturenegative damper motor power supply is less than 3 volts whenrecirculation damper motor moves toward recirculation.

Possible Cause* Short circuit to ground in recirculation positive damper

motor power supply circuit.* Short circuit to ground in temperature negative damper

motor power supply circuit.* Defective damper motor.


Condition DTC 0067 is set when climate control module detects thatthere is no current to recirculation damper motor when motor is on.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in recirculation positive or negative

damper motor circuit.* Defective damper motor.


Condition DTC 0068 is set when climate control module detects thatpower supply to recirculation negative damper motor is less than 0.1volt when motor moves toward fresh air mode.

Possible Cause* Short circuit to ground in recirculation negative damper

motor power supply circuit.* Defective damper motor.


Condition DTC 0046 is set when climate control system detects thatblower fan relay signal for maximum fan speed is low for more than 6

* Short circuit to ground in air distribution positive damper motor power supply.

* Short circuit to ground in temperature positive damper motor power supply.

* Defective damper motor.


Condition DTC 0073 is set when climate control module detects that airdistribution negative damper motor power supply is less than 0.1 voltwhen motor moves toward defrost mode.

Possible Cause* Short circuit to ground in air distribution negative

damper motor power supply.* Defective damper motor.

DTC 0079: ECT SENSOR

Condition DTC 0079 is set when climate control module detects that ECTsensor signal is less than approximately 0.25 volts (5% of powersupply).

Possible Cause* Short circuit to ground in harness.* Defective ECT sensor.

DTC 007A: ECT SENSOR

Condition DTC 007A is set when climate control module detects that ECTsignal is greater than approximately 4.75 volts (95% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in signal circuit or in ground circuit.* Short circuit to battery voltage in signal or ground

circuit.* Defective ECT sensor.

DTC 007C: EVAPORATOR TEMPERATURE SENSOR

Condition DTC 007C is set when climate control module detects thatevaporator temperature sensor signal is less than approximately 0.25volts (5% of power supply).

Possible Cause* Short circuit to ground in signal circuit.* Defective evaporator temperature sensor.

DTC 007D: EVAPORATOR TEMPERATURE SENSOR

Condition DTC 007D is set when climate control module detects thatevaporator temperature sensor signal is greater than approximately 4.75 volts (95% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in signal circuit or in ground circuit.* Short circuit to supply voltage in signal circuit or

ground circuit.* Defective evaporator temperature sensor.

DTC 007E: OUTSIDE TEMPERATURE SENSOR

Condition DTC 007E is set when climate control module detects thatoutside temperature sensor signal is less than approximately 0.25volts (5% of power supply).

Possible Cause* Short circuit to ground in signal circuit.* Defective outside temperature sensor.

DTC 0071: TEMPERATURE/AIR DISTRIBUTION DAMPER MOTOR

Condition DTC 0071 is set when climate control module detects that airdistribution positive damper motor or temperature positive dampermotor power supply is less than 3 volts when air distribution motormoves toward ventilation.

Possible Cause

outside temperature sensor signal is greater than approximately 4.75volts (95% of power supply).

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in signal circuit or in ground circuit.* Short circuit to supply voltage in signal circuit or

ground circuit.* Defective outside temperature sensor.


Condition DTC 0080 is set when climate control module detects thatthere is no current to air distribution damper motor when damper motoris on.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in air distribution positive or negative

damper motor signal circuit.* Defective damper motor.


Condition DTC 0081 is set when climate control module detects thatthere is no current to temperature damper motor when damper motor isactivated.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in temperature positive or negative damper

motor signal circuit.* Defective damper motor.

DTC 0085: 30-POWER SUPPLY

Condition DTC 0067 is set when climate control module detects that 30-power supply for climate control module is missing when ignition isswitched on.

Possible Cause* Terminal contact resistance or oxidation.* Open circuit in climate control module harness.* Defective fuse No. 8 (10-amp) in integrated relay/fuse

box, in engine compartment.* Short circuit to ground in climate control module harness.

DTC 0087: A/C SWITCH

Condition DTC 0087 is set when climate control module detects thatswitch has been depressed for at least 3 minutes.

Possible Cause* Climate control module panel switch is stuck.* Defective climate control module.

DTC 0088: REC SWITCH

Condition DTC 0088 is set when climate control module detects that RECswitch has been depressed for at least 3 minutes.

Possible Cause* Climate control module panel switch is stuck.* Defective climate control module.

DTC 008B: PASSENGER COMPARTMENT TEMPERATURE SENSOR

Condition DTC 008B is set when climate control module detects thatsignal from internal passenger compartment temperature sensor inclimate control module is faulty.

Possible Cause* Defective climate control module passenger compartment

temperature sensor.

DTC 007F: OUTSIDE TEMPERATURE SENSOR

Condition DTC 007F is set when climate control module detects that


A/C SYSTEM PERFORMANCE

1) Ensure compressor drive belt is okay, fan motor runs atall speeds, and that temperature vents shut completely withtemperature switch in full cooling position. 2) Ensure that all air comes from panel vents with modecontrol on vent position, recirculation motor is working, andcondenser fan and cooling fan are working. 3) Start and warm engine to normal operating temperature.Ensure compressor clutch engages when A/C is turned on. Settemperature switch to full cold position, place mode control to ventposition, turn on recirculate air switch and blower fan switch highspeed. 4) Close engine hood, doors and windows. Run engine at 1500-1600 RPM. Place thermometer in one of the center panel vents. Allowsystem to stabilize for at least 8 minutes. Check temperature incenter panel vent. See A/C SYSTEM PERFORMANCE SPECIFICATIONS table.

A/C SYSTEM PERFORMANCE SPECIFICATIONS Ambient Temp. - °F (°C) (1) Outlet Air Temp. - °F (°C)

68 (20) ................................................ 41-46 (5-8)86 (30) ................................................ 41-46 (5-8)104 (40) .............................................. 46-54 (8-12)

(1) - With relative humidity at 40-60 percent.

PIN VOLTAGE TESTS

NOTE: Perform all voltage tests using a DVOM with a minimum 10-megohm input impedance.

Checking pin voltage at ECC control module determines whetherit is receiving or transmitting proper voltage signals. Tests may alsohelp determine if control unit wiring harness has short or opencircuit. See ECC CONTROL MODULE PIN VOLTAGES (2000 MODELS) orECC CONTROL MODULE PIN VOLTAGES (2001 MODELS) table.

ECC CONTROL MODULE PIN VOLTAGES (2000 MODELS)+--------------------------------------------------------------------+¦Pin No.¦ Function/Description ¦ Value ¦¦ (1) ¦ ¦ ¦+-------+---------------------------------------+--------------------¦¦ 1 ¦ Power Supply ¦ Battery Voltage ¦+-------+---------------------------------------+--------------------¦¦ 3 ¦ Power Ground ¦ Zero volts ¦+-------+---------------------------------------+--------------------¦¦ 4 ¦ Speedometer Input Signal ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 5 ¦ Rheostat Input Signal ¦ 2-10 Volts ¦+-------+---------------------------------------+--------------------¦¦ 6 ¦ Supply Voltage To Air Distribution ¦ 5 Volts ¦+-------+---------------------------------------+--------------------¦¦ ¦ Damper Motor Potentiometer ¦ ¦+-------+---------------------------------------+--------------------¦¦ 7 ¦ Temp. Damper Motor Positive Signal ¦ 0-10 Or 10-0 Volts ¦+-------+---------------------------------------+--------------------¦¦ 8 ¦ Temp. Damper Motor Negative Signal ¦ 0-10 Or 10-0 Volts ¦+-------+---------------------------------------+--------------------¦¦ 9 ¦ Air Distribution Damper ¦ 0-10 Or 10-0 Volts ¦¦ ¦ Motor Positive Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 10 ¦ Air Distribution Damper ¦ 0-10 Or 10-0 Volts ¦¦ ¦ Motor Negative Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 11 ¦ Recirculation Damper ¦ 0-10 Or 10-0 Volts ¦¦ ¦ Motor Positive Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 12 ¦ Recirculation Damper ¦ 0-10 Or 10-0 Volts ¦¦ ¦ Motor Negative Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 13 ¦ Communication ¦ About 10 Volts ¦+-------+---------------------------------------+--------------------¦¦ 14 ¦ Outside Temp. Sensor Supply Voltage ¦ 5 Volts ¦+-------+---------------------------------------+--------------------¦

SYSTEM TESTS

¦ 15 ¦ Evaporator Sensor Input Signal ¦ About 2.5 Volts ¦+-------+---------------------------------------+--------------------¦¦ 16 ¦ Engine Coolant Temp. Sensor ¦ 5 Volts ¦¦ ¦ Reference Voltage ¦ ¦+-------+---------------------------------------+--------------------¦¦ 17 ¦ Outside Temp. Sensor Input Signal ¦ About 2.5 Volts ¦+-------+---------------------------------------+--------------------¦¦ 18 ¦ Engine Coolant Sensor Input Signal ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 19 ¦ Sun Sensor Input Signal ¦ 5-300 mV ¦+-------+---------------------------------------+--------------------¦¦ 20 ¦ Temp. Potentiometer Input Signal ¦ .2-4.7 Volts ¦+-------+---------------------------------------+--------------------¦¦ 21 ¦ Air Distribution Damper ¦About .25-4.5 Volts ¦¦ ¦ Motor Potentiometer ¦ ¦+-------+---------------------------------------+--------------------¦¦ 22 ¦ Temp. Damper Motor Potentiometer & ¦ 5 Volts ¦¦ ¦ Evaporator Reference Voltage ¦ ¦+-------+---------------------------------------+--------------------¦¦ 23 ¦ Temp., Air Distribution Damper Motor ¦ Zero Volts ¦¦ ¦ Potentiometer & Sun Sensor Ground ¦ ¦+-------+---------------------------------------+--------------------¦¦ 24 ¦Heated Rear Door Mirror Control Signal ¦ Zero Or ¦¦ ¦ ¦ Battery Voltage ¦+-------+---------------------------------------+--------------------¦¦ 26 ¦ Condenser Fan Relay Control Signal ¦ Battery Voltage ¦+-------+---------------------------------------+--------------------¦¦ 27 ¦ Fan Motor Signal ¦ .2-12 Volts ¦+-------+---------------------------------------+--------------------¦¦ 28 ¦ Blower Motor Speed Regulator ¦ 0-1.7 Volts ¦¦ ¦ Unit Output Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 29 ¦ Fan Relay Output Signal ¦ 0-13 Volts ¦+-------+---------------------------------------+--------------------¦¦ 30 ¦ Charging Signal ¦Battery Voltage With¦¦ ¦ ¦ Engine Running ¦+--------------------------------------------------------------------¦¦(1) - Pin assignments not listed are not used. For terminal ¦¦ identification, see Fig. 7. ¦+--------------------------------------------------------------------+

ECC CONTROL MODULE PIN VOLTAGES (2001 MODELS)+--------------------------------------------------------------------+¦Pin No.¦ Function/Description ¦ Value ¦¦ (1) ¦ ¦ ¦+--------------------------------------------------------------------¦¦ 30-Pin Connector ¦+--------------------------------------------------------------------¦¦ 1 ¦ Power Supply ¦ Battery Voltage ¦+-------+---------------------------------------+--------------------¦¦ 5 ¦ Power Supply ¦ Battery Voltage ¦+-------+---------------------------------------+--------------------¦¦ 6 ¦ Input Signal From Engine ¦ Battery Voltage ¦¦ ¦ Block Heater Timer ¦ ¦+-------+---------------------------------------+--------------------¦¦ 7 ¦ Rheostat Input Signal ¦ 2-10 Volts ¦+-------+---------------------------------------+--------------------¦¦ 8 ¦ Ground ¦ ¦+-------+---------------------------------------+--------------------¦¦ 9 ¦ Communication Cable - ¦ 0-14 Volts, Pulse ¦¦ ¦ Left Seat Heater Module ¦ ¦+-------+---------------------------------------+--------------------¦¦ 10 ¦ Communication Cable - ¦ 0-10 Volts, Pulse ¦¦ ¦ Left Seat Heater Module ¦ ¦+-------+---------------------------------------+--------------------¦¦ 11 ¦ Output Signal From Dynamic ¦Less Than 5 Volts Or¦¦ ¦ Stability Assistance Switch ¦ Greater Than ¦¦ ¦ ¦ 5.6 Volts ¦+-------+---------------------------------------+--------------------¦¦ 12 ¦ Air Distribution Damper ¦ 10-12 Volts ¦¦ ¦ Motor Positive Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 13 ¦ Air Distribution Damper ¦ 10-12 Volts ¦¦ ¦ Motor Negative Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 14 ¦ Temp. Damper Motor Positive Signal ¦ 10-12 Volts ¦+-------+---------------------------------------+--------------------¦¦ 15 ¦ Temp. Damper Motor Negative Signal ¦ 10-12 Volts ¦+-------+---------------------------------------+--------------------¦¦ 16 ¦ Recirculation Damper ¦ 10-12 Volts ¦¦ ¦ Motor Positive Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 17 ¦ Recirculation Damper ¦ 10-12 Volts ¦¦ ¦ Motor Positive Signal ¦ ¦

+-------+---------------------------------------+--------------------¦¦ 18 ¦ Temp. Damper Motor Position ¦ 4.6-5.2 Volts ¦¦ ¦ Sensor Power Supply ¦ ¦+-------+---------------------------------------+--------------------¦¦ 19 ¦ Temp. Damper Motor Position ¦ 0-5 Volts ¦¦ ¦ Sensor Input Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 20 ¦ Temp. Damper Motor Position ¦ N/A ¦¦ ¦ Sensor Ground Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 21 ¦ Air Distribution Damper Motor ¦ 4.6-5.2 Volts ¦¦ ¦ Position Sensor Power Supply ¦ ¦+-------+---------------------------------------+--------------------¦¦ 22 ¦ Air Distribution Damper Motor ¦ 0-5 Volts ¦¦ ¦ Position Sensor Input Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 23 ¦ Air Distribution Damper Motor ¦ N/A ¦¦ ¦ Position Sensor Ground Signal ¦ ¦+-------+---------------------------------------+--------------------¦¦ 24 ¦ Blower Fan Relay Maximum ¦ Zero Or Battery ¦¦ ¦ Speed Control Signal ¦ Voltage ¦+-------+---------------------------------------+--------------------¦¦ 24 ¦ Defroster Relay Control Signal ¦ Zero Or Battery ¦¦ ¦ ¦ Voltage ¦+-------+---------------------------------------+--------------------¦¦ 26 ¦ Fan Motor Signal ¦ .2-12 Volts ¦+-------+---------------------------------------+--------------------¦¦ 27 ¦ Blower Fan Motor Diagnostic Signal ¦ 0-14 Volts ¦+-------+---------------------------------------+--------------------¦¦ 30 ¦ Diagnostic Lead ¦ 10-14 Volts ¦+--------------------------------------------------------------------¦¦ 16-Pin Connector ¦+--------------------------------------------------------------------¦+-------+---------------------------------------+--------------------¦¦ 1 ¦ Outside Temp. Sensor Signal ¦ 0-4.85 Volts ¦+-------+---------------------------------------+--------------------¦¦ 2 ¦ Outside Temp. Sensor Ground ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 3 ¦ Evaporator Temp. Sensor Signal ¦ 0-4.85 Volts ¦+-------+---------------------------------------+--------------------¦¦ 4 ¦ Evaporator Temp. Sensor Ground ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 5 ¦ Engine Coolant Temp. Sensor Signal ¦ 0-4.85 Volts ¦+-------+---------------------------------------+--------------------¦¦ 6 ¦ Engine Coolant Temp. Sensor Ground ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 7 ¦ Sun Sensor Signal ¦ 0-4.85 Volts ¦+-------+---------------------------------------+--------------------¦¦ 8 ¦ Sun Sensor Ground ¦ N/A ¦+-------+---------------------------------------+--------------------¦¦ 10 ¦ Instrument Panel Speed Signal ¦ 0-12 Volts, Pulse ¦+-------+---------------------------------------+--------------------¦¦ 11 ¦ Windshield Wiper Signal ¦ 10-12 Volts ¦+-------+---------------------------------------+--------------------¦¦ 12 ¦ Generator D+ Signal ¦Battery Voltage With¦¦ ¦ ¦ Engine Running ¦+-------+---------------------------------------+--------------------¦¦ 13 ¦ A/C Request Signal From ECM ¦ 0-14 Volts ¦+--------------------------------------------------------------------¦¦(1) - Pin assignments not listed are not used. For terminal ¦¦ identification, see Fig. 7. ¦+--------------------------------------------------------------------+

Fig. 7: Identifying ECC Control Module TerminalsCourtesy of Volvo Cars of North America.

BLOWER MOTOR FAN REGULATOR

Disconnect blower fan motor regulator. See Fig. 3. UsingDVOM, measure resistor between specified terminals. SeeBLOWER FAN MOTOR REGULATOR RESISTANCE SPECIFICATIONS. Replaceregulator as needed.

BLOWER FAN MOTOR REGULATOR RESISTANCE SPECIFICATIONS Measure Between Terminals No. (1) Resistance (Ohms)

1 & 3 .......................................................... 1.22 & 3 ........................................................... .72 & 4 ........................................................... .4

(1) - For terminal identification, see Fig. 8.

Fig. 8: Identifying Blower Motor Speed Regulator TerminalsCourtesy of Volvo Cars of North America.

ENGINE COOLANT TEMPERATURE SENSOR

Disconnect sensor connector. Using DVOM, measure betweensensor connector terminals. SeeENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table. Replace outsidetemperature sensor as needed. See ENGINE COOLANT TEMPERATURE SENSORunder REMOVAL & INSTALLATION.

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE Temperature - °F (°C) k/Ohms

-4 (-20) ........................................... 29.7414 (-10) ........................................... 19.0632 (0) ............................................. 11.7150 (10) ............................................. 7.4568 (20) ............................................. 4.8986 (30) ............................................. 3.30104 (40) ............................................ 2.28122 (50) ............................................ 1.60140 (60) ............................................ 1.15158 (70) ............................................. .85176 (80) ............................................. .63194 (90) ............................................. .52212 (100) ............................................ .40

COMPONENT TESTS

EVAPORATOR TEMPERATURE SENSOR

Disconnect sensor connector. Using DVOM, measure betweensensor connector terminals. SeeEVAPORATOR TEMPERATURE SENSOR RESISTANCE table. Replace evaporatortemperature sensor as needed. SeeEVAPORATOR & OUTSIDE TEMPERATURE SENSORS under REMOVAL & INSTALLATION.

EVAPORATOR TEMPERATURE SENSOR RESISTANCE Temperature - °F (°C) k/Ohms

14 (-10) ........................................... 18.0832 (0) ............................................. 11.3650 (10) ............................................. 7.3268 (20) ............................................. 4.8477 (25) ............................................. 4.0086 (30) ............................................. 3.28104 (40) ............................................ 2.28

OUTSIDE TEMPERATURE SENSOR

Disconnect sensor connector. Using DVOM, measure betweensensor connector terminals. See OUTSIDE TEMPERATURE SENSOR RESISTANCEtable. Replace outside temperature sensor as needed. SeeEVAPORATOR & OUTSIDE TEMPERATURE SENSORS under REMOVAL & INSTALLATION.

OUTSIDE TEMPERATURE SENSOR RESISTANCE Temperature - °F (°C) k/Ohms

14 (-10) ........................................... 18.0832 (0) ............................................. 11.3650 (10) ............................................. 7.3268 (20) ............................................. 4.8477 (25) ............................................. 4.0086 (30) ............................................. 3.28104 (40) ............................................ 2.28

REMOVAL & INSTALLATION


NOTE: Obtain radio anti-theft code from vehicle owner before disconnecting negative battery cable. Radio anti-theft code must be re-entered into radio once negative battery cable is reconnected. To re-enter radio anti-theft code, turn ignition and radio on. When input CODE **** is displayed on radio, re-enter radio anti-theft code by using 1-20/DISC knob.

DASHBOARD

Removal & Installation 1) Disable air bag system. See AIR BAG SYSTEM SAFETY articlein GENERAL SERVICING. Ensure ignition is off. Disconnect negativebattery cable. Remove knee bolster below steering column. Remove sidepanels from front of center console. Remove lower dash panel underglove box. Disconnect and remove courtesy light harness. Open glovebox. Remove inner storage compartment. Remove panel under glove boxfrom dashboard. 2) Remove mounting screws from under steering column. Letsteering column hang down. Remove trim piece in front of instrumentpanel. Remove screws retaining instrument cluster. Remove instrumentcluster. Disconnect instrument harness connectors from dashboard.Disconnect and remove VGLA relay unit from behind dashboard. SeeFig. 9. 3) Remove driver's side ventilation vent assembly. Removespeaker grilles. Lift out speakers and disconnect harness connectors.Disconnect sun sensor from passenger's speaker grille. See Fig. 2. 4) Insert small screwdriver through vents on ECC controlpanel. See Fig. 10. Press up locking tab. Gently pull left corner ofpanel. Pull out right corner of panel. Using trim tools, pry out topcorner of control panel. Remove control panel. 5) Remove radio. Press in catches to release them. Gripcatches and pull out radio. Disconnect harness connector. Remove radiocompartment (if needed). Remove retaining screws from front of front

center console. Remove ECC control panel mount. Remove ECC controlunit. 6) Angle center ventilation vents down. Insert screwdriver ingrille. Press locking tab down and pull vent panel out. Remove buttonfor hazard warning flasher. Press switch locking tabs and push inswitch assembly. Remove vent assembly. 7) Pull out ashtray. Disconnect connectors for lighting andcigarette lighter. Remove retaining screws at rear of center console.Remove rear center console. Remove rear ashtray. Remove retainingscrews. On models equipped with manual transmissions, slide panel atgear selector lever forward. Disconnect it at rear. 8) On models equipped with automatic transmissions, slidepanel at selector lever backward. Disconnect panel at front. On allmodels, disconnect harness connector at parking brake. Remove 2 screwsfor parking brake lever. Move parking brake lever to one side. Pullcenter console backward until it releases from dashboard.

NOTE: Clip between instrument panel and vent panel must be cut off. Mark position of clip on cable harness.

9) Remove retaining screws around perimeter of dashboard.Remove central electronic module mounted near hood release and lethang by harness. See Fig. 11. Disconnect connectors for instrumentpanel, central locking system receiver, passenger air bag module (SRS)and glove box lighting. 10) Remove clips securing cable harnesses to dashboard. Coverupper steering shaft cover with a cloth to prevent damage. Disconnectdashboard and remove. To install, reverse removal procedure.

Fig. 9: Removing VGLA Relay UnitCourtesy of Volvo Cars of North America.

Fig. 10: Removing ECC Control PanelCourtesy of Volvo Cars of North America.

Fig. 11: Locating Central Electronic Control ModuleCourtesy of Volvo Cars of North America.

ECC CONTROL PANEL

Removal & Installation Insert small screwdriver through vents on ECC control panel.See Fig. 10. Press up locking tab. Gently pull left corner of panel.Pull out right corner of panel. Using trim tools, pry out top cornerof control panel. Remove control panel. To install, reverse removalprocedure.

ENGINE COOLANT TEMPERATURE SENSOR

Removal & Installation Remove dashboard assembly. See DASHBOARD. Engine CoolantTemperature (ECT) sensor is located on side of evaporator, in midsection of heating/air conditioning unit. Slide out and remove sensor.See Fig. 12. Install sensor in reverse order of removal.

Fig. 12: Removing ECT SensorCourtesy of Volvo Cars of North America.

Removal & Installation Remove dashboard assembly. See DASHBOARD. Sensors are locatedon either side of evaporator, in mid section of heating/airconditioning unit. Unclip and remove applicable sensor. See Fig. 13.Install sensors in reverse order of removal. Ensure sensors aremounted in correct location. See Figs. 14 and 15.

Fig. 13: Identifying Intermediate Section ComponentsCourtesy of Volvo Cars of North America.

Fig. 14: Locating Evaporator Temperature SensorCourtesy of Volvo Cars of North America.

EVAPORATOR & OUTSIDE TEMPERATURE SENSORS

Fig. 15: Locating Outside Temperature SensorCourtesy of Volvo Cars of North America.

PIPES & RECEIVER-DRIER

Removal & Installation To remove receiver-drier or refrigerant lines, see Fig. 16.

Fig. 16: Identifying Underhood A/C ComponentsCourtesy of Volvo Cars of North America.

Removal & Installation Remove lower dash panel under glove box. Remove filter coverand remove filter. See Fig. 17. To install, reverse removal procedure.

Fig. 17: Removing Ventilation FilterCourtesy of Volvo Cars of North America.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS---------------------------------------------------------------------Application Ft. Lbs. (N.m)

Compressor Bracket-To-Compressor .......................... 30 (40)Compressor Pipe Fitting ................................... 15 (20)Compressor Pipe Flange Bolt ............................... 18 (24)Condenser Inlet & Outlet .................................. 19 (25)Expansion Valve ........................................... 22 (30)Receiver-Drier Connector .................................. 22 (30)

INCH Lbs. (N.m)

High-Pressure Sensor Connector ............................. 7 (10)---------------------------------------------------------------------

VENTILATION FILTER

Fig. 18: Automatic A/C-Heater System Wiring Diagram (2000 S40 &V40 - 1 Of 2)

WIRING DIAGRAMS

automatic a/c-heater system - technosolution.eu

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