187 passive

V-ECU (MID187) Vehicle control unit, passive measuring conditions

Figure 1 Passive resistance measurement against cable harness, vehicle control unit (V-ECU) disconnected

Service Information

Document Title: Function Group: Information Type: Service Information

Date: 10/08/2009

Profile: EXC, EC210B LC (Volvo) [GB]

Conditions 1) Control unit disconnected

2) Multi-pin breaker box connected against cable harness

3a) Turn master switch to the ON position,

NOTE For measuring voltage, the following applies:

3b) Turn start switch to the OFF position, turn master switch to the OFF position and measure the resistance with the multimeter.

NOTE For measuring resistance, the following applies:

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V-ECU Passive measuring

turn start switch to the ON position and measure the voltage with the multimeter.

NOTE During all resistance measurements, the master switch must be turned OFF.

4)Engine off

Abbreviation Explanation U Direct voltage in volts (V) Ubat Battery voltage Ulow Voltage near to 0 volt or 0 volt

R Resistance in ohm (Ω)

Pin Signal / component Measuring points Correct value Miscellaneous

JA1 Contronics key “V” See active measuring. JA2 Contronics clock See active measuring. JA3 Preheater indicator See active measuring. JA4 Not connected

JA5 MA9102, power shift proportional valve ground JA5 - JA32 R ≈ 15–20 Ω

JA6 Not connected

JA7 FU25, fuse for auxiliary proportional valve See active measuring.

JA8 JA9 JA10 JA11 JA12

Not connected

JA13 RE3701, EMS power cut off relay JA13 - JB8 R ≈ 315 Ω ± 10 %

JA14 Rotary switch ground JA15 JA16 Not connected

JA17 Float position pilot pressure switch JA17 - JB8 See active measuring.

JA18 SW9103, travel speed selection switch See active measuring.

JA19 SE9101, attach pilot pressure switch See active measuring.

JA20 Safety lever switch See active measuring. JA21 Not connected

JA22 SW2704, emergency RPM control and stop switch (EMS power check)

See active measuring.

JA23 SW9104, quickfit switch See active measuring. JA24 Contronics key “#” See active measuring. JA25 Contronics key “>” See active measuring. JA26 Contronics data See active measuring. JA27 Coolant level indicator See active measuring. JA28 Coolant temperature indicator See active measuring. JA29 Not connected

JA30 MA9101, flow control proportional valve ground JA30 - JA56 R ≈ 15–20 Ω

JA31 Not connected

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JA32 MA9102, power shift proportional valve signal JA32 - JA5 R ≈ 15–20 Ω

JA33 FU25, fuse for proportional valve See active measuring.

JA34 VECU status JA34 - JB8 R ≈ 320–345 KΩ

JA35 FU27, fuse for conflux shut off See active measuring.

JA36 MA9107, power boost solenoid valve JA36 - JB8 R ≈ 20–30 Ω

JA37 MA9105 / MA9106, conflux shut off solenoid valve JA37 - JB8 R ≈ 10–15 Ω

JA38 RE9102, travel motor relay JA38 - JB8 R ≈ 315 Ω ± 10 %

JA39 SW2701, engine speed control switch JA39 - JA14 R ≈ 46.5–47.5 KΩ

JA40 JA41 Not connected

JA42 SW9105, quickfit switch (confirm) See active measuring.

JA43 SE9103, travel pilot pressure switch See active measuring.

JA44 SW2702, Power max mode select switch JA44 - JB8 R ≈ 0 Ω (power max mode

select switch: ON only) See active measuring.


JA47 SW2704, emergency RPM control and stop switch (IVS) JA47 - JB8 R ≈ 2.89–2.91 KΩ

JA48 Contronics key "*” See active measuring. JA49 Contronics enable See active measuring. JA50 Not connected JA51 Air cleaner indicator See active measuring. JA52 Float position indicator JA53 JA54 JA55

Not connected

JA56 MA9101, flow control proportional valve signal JA56 - JA30 R ≈ 15–20 Ω


JA59 Float position solenoid valve JA59 - JB8 R ≈ 20–30 Ω

JA60 FU27, fuse for power boost solenoid valve See active measuring.

JA61 RE3101, battery relay cut off signal See active measuring.

JA62 SW9101, flow control switch signal See active measuring.

JA63 JA64 JA65

Not connected

JA66 SE9102, hammer pilot pressure switch See active measuring.

JA67 SW2703, auto idle select switch See active measuring.

JA68 MA9117, hammer selection solenoid valve (hammer select check) (option)

JA69 Float position switch See active measuring.

JA70 SW9109 / SW9110, Rotator switch, left / right (option) See active measuring.

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JB1 SW9107, boost / hammer / shear selecting switch See active measuring.

JB2 SW3301, engine start key (R2) See active measuring.

JB3 Not connected JB4 J1587 B (white color) See active measuring. JB5 Shield ground (J1939) JB6 CAN L (J1939 L, green color) JB6 - JB14 R ≈ 60 Ω JB7 Battery ground JB8 Battery ground

JB9 SW3301, engine start key (ACC) See active measuring.

JB10 Not connected JB11 Rotary switch power (option) See active measuring. JB12 J1587 A (red color) See active measuring. JB13 Shield ground (J1587)

JB14 CAN H (J1939 H, yellow color) JB14 - JB6 R ≈ 60 Ω

JB15 Battery +24 V See active measuring. JB16 Battery +24 V See active measuring.

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187 passive

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