4/9/2019 climate control module (ccm) • 2011 volvo v50 ......to the climate control module (ccm)...

4/9/2019 Climate control module (CCM) • 2011 Volvo V50 • MotoLogic

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2011 Volvo V50

System overviewControl module

The climate control module (CCM) controls the climate control system and the buttons in the dashboardenvironment panel.

The climate control module (CCM) is located in the center console. There are four different versions of thecontrol module (market dependent). These are:

ECC (Electronic Climate Control) with switches for the carphone in the keypadECC without switches for the carphone in the keypadMCC (Manual Climate Control) with switches for the carphone in the keypadMCC without switches for the carphone in the keypad.

ECC is a fully automatic climate control system with air conditioning. It also allows manual settings. MCC is amanual climate control system with air conditioning.

The climate control module (CCM) communicates with components which are directly connected and also withother control modules and components via LIN and CAN communication.

Climate control module (CCM) communicates via two separate LIN busses with:

damper motorsair quality sensor (AQS)switch, tunnel console, front and rear (2008-)seat heaters

The number of components on the LIN buses varies, depending on the equipment level of the vehicle(ECC/MCC and any options) and whether the vehicle is left or right-hand drive. The following componentscommunicate on LIN bus 1:

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the damper motor module (DMM) for air distributionthe damper motor module (DMM) for temperature leftthe damper motor module (DMM) for recirculation (right-hand drive cars only)the air quality sensor (AQS) (right-hand drive cars only)the left-hand seat heaterswitch, tunnel console, front and rear (2008-)

The following components communicate on LIN bus 2:

the damper motor module (DMM) for the defrosterthe damper motor module (DMM) for temperature right (ECC only)the damper motor module (DMM) for recirculation (left-hand drive cars only)the air quality sensor (AQS) (left-hand drive cars only)the right-hand seat heater.

The control module checks activations and input and output signals via an integrated diagnostic system. Adiagnostic trouble code (DTC) is stored in certain cases if the control module detects a fault.

Any diagnostic trouble codes (DTCs) are stored in the control module memory. The data can be read off usingVIDA.

A simple check to determine that the climate control module (CCM) is powered and grounded is to activate oneof the functions controlled by the buttons on the dashboard environment panel and to check that the LEDs comeon or go out.

For further information, also see Signal specifications.

Signals

The table below summarizes the input signals to and output signals from the climate control module (CCM). Thesignal types are divided into directly connected signals, LIN and CAN communication. The illustration belowdisplays the same information with the Volvo component designations.

Input signals Output signals

Directly connected: Directly connected: (Power supply unless otherwisestated)

Switch DSTC/STC (3/95) (-2006, does notapply to C70)Switch BLIS (3/286) (2007-, does not applyto the C70)Passenger compartment temperature sensor(6/117)Evaporator temperature sensor for ECC(7/41)

Switch DSTC/STC (3/95) (-2006, does notapply to C70)Switch BLIS (3/286) (2007-, does not applyto the C70)Fan, passenger compartment temperaturesensor (6/117).



Via LIN communication: Via LIN communication:

Damper motor module (DMM) for ECC(6/48, 6/95-96, 6/102-103)Damper motor module (DMM) for MCC(6/48, 6/95, 6/102-103)Air quality sensor (AQS) (7/159)Seat heating module (SHM), passenger side(9/13)Seat heating module (SHM), driver's side(9/12).Switch, tunnel console, front and rear(2008-) (3/286)

Damper motor module (DMM) for ECC (6/48,6/95-96, 6/102-103)Damper motor module (DMM) for MCC(6/48, 6/95, 6/102-103)Air quality sensor (AQS) (7/159)Seat heating module (SHM), passenger side(9/13)Seat heating module (SHM), driver's side(9/12).Switch, tunnel console, front and rear(2008-) (3/286)

Via Controller Area Network (CAN) communication: Via Controller Area Network (CAN) communication:

Brake control module (BCM) (4/16)Central electronic module (CEM) (4/56)Combustion preheater module (CPM) (4/7)Driver door module (DDM) (3/126)Driver information module (DIM) (5/1)Engine control module (ECM) (4/46)Infotainment control module (ICM) (16/1)Passenger door module (PDM) (3/127)Steering wheel module (SWM) (3/254).Convertible Roof Module (CRM) (4/59) (onlyapplies to C70)Parking Assistance Module (PAM) (4/86)(2008-)

Accessory electronic module (AEM) (4/78)Brake control module (BCM) (4/16)Combustion preheater module (CPM) (4/7)Driver information module (DIM) (5/1)Driver door module (DDM) (3/126)Engine control module (ECM) (4/46)Infotainment control module (ICM) (16/1)Passenger door module (PDM) (3/127)Parking Assistance Module (PAM) (4/86)(2008-)



DesignDamper motor module (DMM)



The damper motor module (DMM) consists of a control unit and a stepper motor. The different versions of theclimate control system have up to 5 damper motor modules (DMM). These are for the different functions such asdefroster and recirculation. The climate control module (CCM) communicates with the other damper motormodules (DMM) via two LIN buses, LIN bus 1 and LIN bus 2. The position of the damper motors on the LINbuses depends on whether the vehicle is left or right-hand drive.

When regulating the different dampers, the climate control module (CCM) transmits a request for a new damperposition to the each damper motor module (DMM). The damper motor module (DMM) calculates and thenregulates the required direction and number of steps required to obtain the requested position. The dampermotor module (DMM) then transmits information to the climate control module (CCM) indicating the actualdamper position and status.

When replacing the damper motor module (DMM), the new damper motor must be identified by the climatecontrol module (CCM). This is carried out via VIDA. When replacing the damper motors, ensure that identificationis carried out.

Each damper motor module (DMM) is powered via a relay in the central electronic module (CEM).

There are diagnostics for the damper motor module (DMM).

Evaporator temperature sensor (only ECC)

The evaporator temperature sensor is installed on the heater. Its role is to inform the climate control module(CCM) of the temperature of the refrigerant. The climate control module (CCM) controls the request from the



evaporator temperature sensor to activate the air conditioning compressor. The evaporator temperature sensor isdirectly connected to the climate control module (CCM).

There are diagnostics for the evaporator temperature sensor.

Switch STC/DSTC/BLIS (-2007) (Does not apply to C70)

The switch for STC/DSTC (-2006) and BLIS (2007-) is located in the center console. The switch and its LED aredirectly connected to the Climate control module (CCM).

There are diagnostics for the switch.

Switch, tunnel console, front and rear (2008-)

Switch, tunnel console, available in two versions, tunnel console front (1) and tunnel console rear (2) (only C70).Both these are keypads with room for two switches in each.

The following applies to the C70: If the vehicle is equipped with "blind spot" warning (BLIS), and/or parkingassistance (PAS), the tunnel console front, switch (1) is used to open and close the roof. In this case, the switchis directly connected to the Convertible Roof Module (CRM) and is then not a LIN node. Switch, tunnel consolerear (2) communicates with Climate control module (CCM) via LIN communication and controls activation anddeactivation of "blind spot" warning (BLIS) and/or parking assistance system (PAS). If the vehicle is not equippedwith "blind spot" warning (BLIS) or parking assistance system (PAS), there is no switch, tunnel console rear (2).For further information, see Design and Function, Door control modules and Design and Function, ParkingAssistance Module (PAM).



The following applies to the S40/V50/C30: 1. If the vehicle is equipped with all three functions, acc. to below, theswitch tunnel console front controls (1) activation and deactivation of the functions "dead angle"-warning (BLIS)and automatic start/stop of engine. Switch tunnel console rear (2) controls activation and deactivation of thefunction parking assistance system (PAS). The functions are:

"dead angle"-warning (BLIS)parking assistance system (PAS)automatic start/stop of engine

2. If the vehicle is equipped with up to two of the mentioned functions above, switch tunnel console front (1)controls activation and deactivation of these functions. Switch, tunnel console front and rear are then connectedto the Climate control module (CCM) via LIN-communication. If the vehicle is not equipped with "dead angle"-warning (BLIS), parking assistance system (PAS) or automatic start/stop of engine, there is no switch in thetunnel console. For more information, see Design and Function, Door modules, Design and Function, ParkingAssistance Module (PAM), as well as Design and Function, Automatic start/stop of engine.

Passenger compartment temperature sensor (ECC only)

The passenger compartment temperature sensor is behind the dashboard environment panel on the left-handside. The climate control module (CCM) (for ECC) receives the value indicating the present passengercompartment temperature from the sensor. There is also a fan on the sensor. The fan supplies the sensor withair from the passenger compartment. This prevents the value from the sensor from being distorted by heatgenerated by surrounding electronics.

The passenger compartment temperature sensor and fan are directly connected to the climate control module(CCM).

There are diagnostics for the passenger compartment temperature sensor and fan.

Blower fanBlower fan0900c8af8135a539_674_505.jpeg

The blower fan is brushless, of the permanent magnet type. It supplies airflow through the vehicle, and must berunning for the climate control to connect.



The blower fan is controlled via a PWM signal from the Central electronic module (CEM). The Climate controlmodule (CCM) controls the speed of the blower fan with a request to the Central electronic module (CEM) via theCAN network.

The blower fan can be diagnosed via the Central electronic module (CEM), among others, via a PWM controlsignal that it sends back to the Central electronic module (CEM).

Air quality sensor (AQS) (ECC only, option)

An Air quality sensor (AQS) is available as an option for ECC. The Air quality sensor (AQS) is included with aparticle filter and a humidity sensor (2008-) in a system whose main task is to ensure that the air in thepassenger compartment is free of contaminants. The task of the Air quality sensor (AQS) is to transmit signals tothe Climate control module (CCM) if it registers increased amounts of contaminated outdoor air. The air qualitysensor (AQS) measures concentrations of COx and NOx.

The air quality sensor (AQS) compares the present values with previous ones and can calculate changes inpollutant concentrations. The air quality sensor (AQS) communicates with the climate control module (CCM) viaa LIN bus.

The signal from the air quality sensor (AQS) to the climate control module (CCM) has four steps, 0-3:

signal 0= no increase in or reduced pollutant levelsignal 1 = gradual increase in pollutant levelsignal 2 = medium increase in pollutant levelsignal 3 = rapid increase in pollutant level.

The climate control module (CCM) uses the signal to control the recirculation damper motor.

The air quality sensor (AQS) is under the cowl on the right-hand side of the fresh air intake.

There are diagnostics for the air quality sensor (AQS).

Humidity sensor (option, only ECC 2008-)

See Design and Function, Central electronic module (CEM).

Seat heaters



The system for the seat heaters consists of three different parts:

a seat heating module (SHM) which controls the function for communicating with the climate controlmodule (CCM)two heater padsa temperature sensor.

The seat heating module (SHM) is under the left and right-hand front seat. The heater pads are in the seat andbackrest. The temperature sensor is in the seat.

The seat heating module (SHM) is directly connected to the heater pad and temperature sensor. The seatheating module (SHM) communicates with the climate control module (CCM) via a LIN bus.

There are diagnostics for the seat heating module (SHM).

FunctionControlling the climate in the passenger compartment


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The way in which the climate in the passenger compartment is regulated depends on the type of climate controlmodule (CCM) in the car.



ECC Electronic climate control means that either manual settings or the AUTO function can be used. In the lattercase the control module automatically regulates heat, air conditioning, recirculation and air distribution until theselected temperature is achieved.

Manual climate control (MCC) Manual climate control means that heat, air conditioning, recirculation and airdistribution must be selected manually.

Climate control module (CCM) (3/112) regulates the following:

Activation of the air conditioning (A/C) compressor (8/3) using a request via the controller area network(CAN) to the engine control module (ECM) (4/46)Controlling the damper motors. For ECC (6/48), (6/95), (6/96), (6/102) and (6/103). For MCC (6/48),(6/95), (6/102) and (6/103)The speed of the blower fan (6/28) using a request to the central electronic module (CEM) (4/56) viathe controller area network (CAN).

The climate control module (CCM) regulates the climate in the passenger compartment based on the followinginput signals:

Passenger compartment temperature, signal from the passenger compartment temperature sensor(6/117)Outside temperature, signal from the outside temperature sensor (7/69) via the central electronicmodule (CEM) on the controller area network (CAN)Evaporator temperature (only ECC), signal from evaporator temperature sensor (7/41).Status of the side window, signals from the driver door module (DDM) (3/126) and passenger doormodule (PDM) (3/127) via the controller area network (CAN)Status of the doors, signal from the central electronic module (CEM) via the controller area network(CAN)The sun intensity, signal from sun sensor (7/12) via the central electronic module (CEM). After structureweek 200746, there are 2 signals, one for the right-hand side and one for the left-hand side.Speed, signal from the brake control module (BCM) (4/16) via the controller area network (CAN)Status of the windshield wipers, signal from the steering wheel module (SWM) (3/254) via the controllerarea network (CAN).

The climate control module (CCM) (for ECC) uses information about the status of the side windows and doors todetermine how it should compensate for changes in the passenger compartment temperature. If any sidewindows or doors are opened, the climate control module (CCM) will not compensate for a change in thepassenger compartment temperature. Instead it maintains the same level of climate control for the compressorand blower fan as before.

The climate control module (CCM) (for ECC) uses the signal from the steering wheel module (SWM) indicatingthat the windshield wipers are on. This is to regulate the blower fan and the damper motor to remove any mistfrom the inside of the windshield when it rains.

For vehicles manufactured before structure week 200745, the following applies: The climate control module(CCM) (for ECC) uses the signal from the sun sensor to compensate for high sun intensity. This is done by



lowering the temperature of the ventilation air, altering air distribution and increasing the speed of the blower fan.

For vehicles manufactured after structure week 200746, the following applies: The Climate control module(CCM) (for ECC) registers the sun intensity on the left and right sides. Using these signals, the Climate controlmodule (CCM) compensates for the high sun intensity. This is done by reducing the temperature of theventilation air on the affected side. The distribution of air is altered and the speed of the passenger compartmentfan is increased.

The climate control module (CCM) (for ECC) uses the signal from the evaporator temperature sensor to controlthe activation of the air conditioning (A/C) compressor. If the signal from the evaporator temperature sensorindicates an evaporator temperature below 6 °C, the compressor is not permitted to start because of the risk offreezing.

To maintain a constant flow of air in the passenger compartment, the climate control module (CCM) (for ECC)uses the speed signal from the brake control module (BCM) to regulate the speed of the blower fan. Generally,as the speed of the car increases the speed of the blower fan decreases. At higher speeds the flow of air into thefresh air damper is adjusted.

When adjusting the climate settings manually, such as setting the temperature, this is displayed on theinfotainment control module (ICM). The climate control module (CCM) transmits a signal to the infotainmentcontrol module (ICM) (16/1) via the controller area network (CAN).

Electrical additional heaterVehicles with diesel engines have an electrical additional heater on certain markets. Climate control module(CCM) (3/112) checks the function of the electrical additional heater. The central electronic module (CEM)transmits information regularly to the climate control module (CCM), for example, about the permitted size of theoutput voltage. For further information, see Design and Function, central electronic module (CEM), and Designand Function, climate control module (CCM).

Regulating seat heat

The seat heaters are activated using the switches on the climate control module (CCM) (3/112). The function isnormally switched off. When activating the seat heaters, the first position is high temperature. If the button ispressed again, the temperature will be low. The status of the indication is displayed via LEDs. The climate controlmodule (CCM) transmits information about the selected temperature to the relevant seat heating module (SHM)



on the relevant LIN bus. The seat heating module (SHM) then controls the current to the heater pads. Each seatheating module (SHM) then transmits its present status to the climate control module (CCM).

Communication between the climate control module (CCM) and each seat heating module (SHM) takes place inthe following way:

seat heating module (SHM), left (9/12) on LIN bus 1seat heating module (SHM), right (9/13) on LIN bus 2.

The climate control module (CCM) receives information from the central electronic module (CEM) (4/56) aboutthe type of seat and upholstery via the controller area network (CAN). The levels for high and low temperatureare adapted for the relevant seat and upholstery by the climate control module (CCM). To a certain extent, thelevels for high and low temperature can be adapted to the wishes of the customer using VIDA.

Recirculation control (electronic climate control only)

For ECC, the climate control module (CCM) (3/112) controls the recirculation during the following conditions:

the recirculation switch is on (the LED lights orange)the system is in AUTO mode and there is a large difference between the desired and currenttemperaturethe car is equipped with an air quality sensor (AQS), and the recirculation switch is on (the LED lightsgreen).

The air quality sensor (AQS) (7/159) transmits a signal to the climate control module (CCM) if it detects raisedconcentrations of pollutants in the outside air. When this occurs, the climate control module (CCM) transmits asignal to the damper motor for recirculation (6/48) to close the fresh air damper and to use recirculated air.

The degree of recirculation is controlled by the signal from the air quality sensor (AQS):

signal 1 provides partial recirculation for speeds below 85 km/h, no recirculation for speeds exceeding85 km/hsignals 2 and 3 provide 100% recirculation.

If the high level of pollutants remains the system stays in recirculation for certain time, maximum of 10 minutes.The time that the system is recirculating is determined by the outside temperature, if air conditioning (A/C) is on



or the windshield wipers are activated. The system returns to fresh air for a short time before recirculation isresumed. The particle filter absorbs most of the pollutant entering the passenger compartment during this time.The maximum time prevents misting and musty air.

The air quality sensor (AQS) transmits information about the content of pollutants to the climate control module(CCM). This information is graded into four levels, and the information used for diagnosis.

Recirculation is never permitted if defroster is selected. The climate control module (CCM) (for ECC) alsorequests compressor activation when the evaporator temperature exceeds 3 °C.

Regulating humidity

The humidity sensor checks for condensation on the windscreen. In the event of a risk of condensation, it sendsa signal via serial communication to the Central electronic module (CEM) (4/56), which forwards the signal to viathe CAN network to the Climate control module (CCM). Climate control module (CCM) (3/112) receives the signaland reacts as follows:

1. Dries the incoming air by reducing the set point of the evaporator (for ECC).2. Starts taking in more fresh air. If the Air quality sensor (AQS) (7/159) has transmitted signals to the

Climate control module (CCM) to close the fresh air damper, the Climate control module (CCM)ignores the signal and opens the fresh air damper.

3. Transmits signals to the Damper motor module (DMM) defroster (6/102) to increase the air flow on thefront windscreen.

4. Increases the speed of the blower fan by transmitting a signal to the Central electronic module (CEM).

Heated rear windshield and door mirrors



The heated rear windshield and door mirrors are activated by pressing the switch on the climate control module(CCM) (3/112). The climate control module (CCM) transmits information via the controller area network (CAN)indicating the status of the electrical heating to the following:

central electronic module (CEM) (4/56)driver door module (DDM) (3/126)passenger door module (PDM) (3/127).

For further information, see Design and Function, door control modules (DDM/PDM) and Design and Function,central electronic module (CEM).

On vehicles with certain diesel engines the rear demist can start without manual activation. This means that theengine sometimes needs to reach a much greater working temperature to burn soot particles that are trapped inthe particle filter. By starting the rear demist, together with other actions, the vehicle's alternator is loaded and theengine coolant temperature rises. Read more detailed information about this function in Design and Function,Engine control module (ECM).

Regulating the climate in the passenger compartment of the C70

The climate control is regulated slightly differently in the C70 when operating the electric retractable roof. Whenthe roof is opened, the rear windshield defroster switches off. When the roof is then closed, the defrosterswitches on again. When the roof is open and the climate control is in the auto mode, the passengercompartment temperature sensor (6/117) is deactivated.

Switches on the keypad



In principle, the keypad on the climate control module (CCM) can be divided into an upper and lower section.The switches on the lower section directly affect the climate control module (CCM) (3/112) by activating thefollowing functions. For example:

climate controlactivation of the seat heatersetc.

The upper section covers functions of the infotainment system. When these switches are activated, the climatecontrol module (CCM) transmits a signal to the infotainment control module (ICM) (16/1) via the controller areanetwork (CAN). When switches on the keypad are activated, the climate control module (CCM) will light anyLEDs, even if the function is not available for any reason. For further information, see Design and Function,infotainment control module (ICM).

Activation of STC/DSTC (-2006, does not apply to C70)

The STC/DSTC function is activated using the switch (3/95) on the center console. The ignition key must be inposition II and the engine running for the climate control module (CCM) (3/112) to accept activation of thisfunction. During activation and deactivation, the climate control module (CCM) transmits a signal indicating theselected status for STC/DSTC to the brake control module (4/16) via the controller area network (CAN).

The brake control module (BCM) then transmits a signal to the climate control module (CCM) indicating that theSTC or DSTC function is on or off. The climate control module (CCM) uses this information to light and turn offthe LED in the switch.



For further information about STC/DSTC, see Design and Function, brake control module (BCM).

Activating BLIS (2007-, does not apply to C70 2007)

The function for "blind spot" warning (BLIS) is activated using the switch (3/286) located in the tunnel console.The ignition key must be in position II and the engine running for the climate control module (CCM) (3/112) toaccept activation of this function.

When activating BLIS, the Climate control module (CCM) transmits a signal, about the selected status via theCAN network to the Driver door module (DDM) / Passenger door module (PDM).

The Driver door module (DDM) / Passenger door module (PDM) then transmit a signal to the Climate controlmodule (CCM) about whether the BLIS function is on or off. The Climate control module (CCM) uses theinformation to light and extinguish the LED on the switch. For further information about BLIS, see Design andFunction, door control modules.

Activating the parking assistance system (PAS) (2008-)

The function for parking assistance system (PAS) is activated using the switch (3/286) located in the tunnelconsole. The ignition key must be in position II and the engine running for the climate control module (CCM)(3/112) to accept activation of this function.

When activating parking assistance system (PAS), the Climate control module (CCM) transmits a signal, aboutthe selected status via the CAN network to the Parking Assistance Module (PAM) (4/86).



Parking Assistance Module (PAM) then sends a signal to the Climate control module (CCM) stating whether theparking assistance function is on or off. The Climate control module (CCM) uses the information to light andextinguish the LED on the switch. For more information about the parking assistance system (PAS), see designand function, Parking Assistance Module (PAM).

Activating automatic start/stop of engine (only on vehicles with the function automaticstart/stop of engine)

The function automatic start/stop of engine is activated with the switch (3/286) located in the tunnel console. Theignition key must be in position II and the engine running for the climate control module (CCM) (3/112) to acceptactivation of this function.

When activating the function automatic start/stop of engine, Climate control module (CCM) sends a signal aboutchosen status of the function to Engine control module (ECM) (4/46) via the CAN-net.

Then, Engine control module (ECM) sends a signal to Climate control module (CCM) if the function automaticstart/stop of engine is on or off. The Climate control module (CCM) uses the information to light and extinguishthe LED on the switch.

For more information about the function automatic start/stop of engine, see Design and Function, Automaticstart/stop of engine.

Diagnostic functionsGeneral

The climate control module (CCM) has a built-in diagnostic system which continuously monitors internalfunctions and input and output signals.

Diagnostic trouble codes (DTCs)

Diagnostic trouble codes (DTCs) are stored in the control module if the climate control module (CCM) detects afault. Each diagnostic trouble code (DTC) has a counter which records the number of operating cycles whichhave been fault-free since the diagnostic trouble code (DTC) was last stored. A fault which is detected in thepresent operating cycle is defined as permanent. A fault which is detected in one or more operating cycles(although not the present one) is defined as intermittent. An operating cycle is the period from when the ignitionhas been off, then on for at least 10 seconds and finally off for at least 10 seconds.



Reading and erasing diagnostic trouble codes (DTCs)

Stored diagnostic trouble codes (DTCs) can be read off and erased using this function.

Reading off input and output signals

Using this function, the status or value of parameters can be read off. The presentation of the status or value canbe graphic or digital. For more information on the different parameters, see Vehicle communication informationunder Specifications, other.

Reading off extended fault-tracing information

This function can be used to read parameters, status identifiers and counters stored at the same time as adiagnostic trouble code (DTC). These are called frozen values. For more information, see Vehicle communicationinformation in Specifications, other.

Programming the climate control module (CCM), customer adaptation

Certain parameters for the climate control module (CCM) can be read off and programmed using this function.The purpose of this programming is to:

read the programmed parameters before replacing the control module. This is so the same parameterscan be entered into the new control moduleadapt the function of the control module to the requirements of the driver (customer adaptation).

Programming the seat temperatureEnter the setting for the high and low temperature levels for heating the front seat.

Identifying the damper motors

This function is used to identify the damper motor module (DMM) after a replacement. When replacing thedamper motor module (DMM), the new unit will have a general identity on the LIN bus. The damper motormodule (DMM) must then be run to its limit positions. The number of steps the motor can be run between thelimit positions is unique for each damper. This determines the functionality of the new damper motor module(DMM) for the climate control module (CCM).

Checking the LIN bus

This function is used to check the components communicating with the climate control module (CCM) via LINbus 1 and LIN bus 2. A diagnostic trouble code (DTC) between CCM-0070 and CCM-0072 will be stored,depending on the fault, if there is a fault in one of the LIN buses. These diagnostic trouble codes (DTCs) can onlybe stored for this diagnostic function.

Downloading software and replacing the control module

New software can be downloaded into the climate control module (CCM). When ordering software, the hardwareand the software in the car is compared to the information in the Volvo central database. If the comparison is OKthe software is downloaded to the control module.



If the comparison between the car and Volvo central database is not OK, the database is updated with the carconfiguration. When this is complete the software is downloaded.

The entire climate control module (CCM) must be replaced as one unit.

Two different customer parameters can be programmed into the climate control module (CCM). These customerparameters are stored in the control module but not in the Volvo central database. This means that the customerparameters must be reprogrammed when hardware is replaced. For further information about programmablecustomer parameters, see:

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