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Test readings, control module connections

Test readings, control module connections




Scope

Readings and directions for measuring control module voltage levels can be found under this heading.

Remember:


Note the test conditions and use common sense when assessing the test result.

The specified readings are with the ignition in position ON unless otherwise stated.

First check that the control module has a power supply and is grounded.

Then check all sensor inputs and signals from other systems.

Finally, check the control module outputs. Remember that the readings do not determine whether the actuator is working.

If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.

The specified test readings refer to those obtained with a calibrated Fluke 88/97.

Test readings in % (+) and ms (+) show the pulse ratio and pulse duration of the signal. A test instrument capable of giving pulse ratio and pulse duration readings must be used. The (+) sign indicates a positive trigger pulse, TRIG+.



Control module connector


Pin No.

Cable colour

Component/

function

In/Out

Test conditions

Across

Test reading

See

1

RD/YE

Courtesy / floor lighting

Out

Door open

1-57

B+

Lighting and signalling systems





2

BU/WH

Luggage compartment lighting

Out

Boot lid open

2-57

B+

Lighting and signalling systems



3

RD/BU

Hazard flashers, switch

In

Switch depressed (closed)

3-26

B+

Lighting and signalling systems



4

GN/GY

Dipped beam relay

Out

Light switch in pos. 2.

Ignition ON

4-26

B+

Lighting and signalling systems



5

WH

I-bus (-)

In/Out

Bus active

5-57

2-3V



6



No connection











7

OG

Ignition +B, logic

In

Key turned in ignition switch

7-57

B+

,

8



No connection











9

GN/BU

A/C pressure sensor in

In

Ignition ON

9-54

0.4-4.6 V (2-30 bar)

Heating and ventilation, A/C



10

BU/WH

Evaporation temperature sensor. Power supply

In

Ignition ON

10-30

6°C = 2.8-3.7V

Heating and ventilation, A/C



11

OG/WH

Main beam relay

Out

Main beam, light switch in pos. 2.

Ignition ON

11-26

B+

Lighting and signalling systems



12

RD/YE

Rear window intermittent wiper, relay

Out

Activate with diagnostic tool

12-26

B+

Wash/wipe systems



13



No connection











14

GN

I-bus (+)

In/Out

Bus active

14-57

2-3V



15

YE/BU

Light switch, pos. 2

In

Light switch in pos. 2.

Ignition ON

15-57

B+

Lighting and signalling systems



16

BK/GN

Rear fog lights, switch

In

Light switch in pos. 2.

Ignition ON. Hold switch depressed (closed)

16-57

B+

Lighting and signalling systems



17



No connection











18

YE/GN

Electrically heated rear window from MCC

In

Hold switch depressed (closed)

18-57

B+

Glass, windows and mirrors



19

BK/GN

Rear window intermittent wiper, switch

In

Ignition ON. Switch in intermittent position.

19-57

B+

Wash/wipe systems



20

WH

Direction indicators LH, switch

In

Switch to the left.

20-57

B+

Lighting and signalling systems



21

GN

Intermittent wiper, switch

In

Ignition ON. Switch in intermittent position.

21-57

B+

Wash/wipe systems



22

RD

Direction indicators, power supply +30

In

Always +30.

22-57

B+

Lighting and signalling systems



23

RD/GN

Interior lighting

Out

Door open

23-57

B+

Lighting and signalling systems



24

RD

Comfort lighting in cabin, power supply +30

In

Always +30

24-57

B+

Lighting and signalling systems



25

RD/WH

Rear fog light, lamp

Out

Light switch in pos. 2.

Ignition ON. Hold switch depressed (closed).

25-57

B+

Lighting and signalling systems



26

RD

DICE, power supply +30

In

Always +30

26-57

B+



27

YE

Headlamp wiper, relay

Out

Activate with diagnostic tool.

26-27

B+

Wash/wipe systems



28

BU

Diagnostics KW 2000

In/Out

Communication with DICE or a bus system

28-57

11V

,

29

GN

Front fog lights, relay

Out

Market dependent or activate with diagnostic tool.

26-29

B+

Lighting and signalling systems



30

RD/GN

Evaporator temperature sensor, ground

In

Always

26-30

B+

Heating and ventilation, A/C



31

VT

Ignition +54, logic

In

Key in “ON” position

31-57

B+



32



No connection











33

GN/GY

Intermittent wiper potentiometer, ground

In

Always

26-33

B+

Wash/wipe systems



34



No connection











35

RD/WH

Radiator fan, low speed, relay

Out

Activate with diagnostic tool

26-35

B+

Cooling system

LINK.



36



No connection











37



No connection











38

YE/BU

A/C pressure sensor, power supply

Out

Ignition ON

38-57

5V

Heating and ventilation, A/C



39

PK

Light switch in zero position

In

Light switch in zero position. Ignition ON

39-57

B+ (fuse 35 fitted)

0V (fuse 35 not fitted)

Lighting and signalling systems



40



No connection











41

BK/VT

Main/dipped beam

In

Move stalk switch to farthest position

41-57

B+

Lighting and signalling systems



42

GY/WH

Rear window washer, switch

In

Ignition ON. Switch activated.

42-57

B+

Wash/wipe systems



43



No connection











44

YE

Direction indicators RH, switch

In

Switch to the right

44-57

B+

Lighting and signalling systems



45

GN

Reversing-light switch

In

Reverse gear selected

45-57

B+

Lighting and signalling systems



46

RD

Map/cabin lighting, power supply +30

In

Always +30

46-57

B+

Lighting and signalling systems



47

YE/GY

Direction indicators RH, lamp

Out

Switch to the right

Ignition ON

47-57

B+

Lighting and signalling systems



48

RD

Rear fog light, power supply +30

In

Always +30

48-57

B+

Lighting and signalling systems



49

BU/WH

Button illumination

Out

Light switch in pos. 2.

Ignition ON. Rheostat in max. position.

49-57

PWM 3.5V to B+

Lighting and signalling systems



50



No connection











51

GN/WH

Radiator fan, high, relay 2

Out

Activate with diagnostic tool

26-51

B+

Cooling system





52

BU/WH

Electrically heated rear window, relay

Out

Ignition ON. Hold switch depressed (closed).

26-52

B+

Glass, windows and mirrors



53

GY/WH

Radiator fan, high, relay 1

Out

Activate with diagnostic tool.

26-53

B+

Cooling system





54

OG

A/C pressure sensor, ground

In

Always

26-54

B+

Heating and ventilation, A/C



55

VT/WH

Intermittent wiper, rheostat

In

Ignition ON

55-57

2 sec: 0V 15 sec: 6.3V

Wash/wipe systems



56



No connection











57

BK

Ground

In

Always

57-B+

B+



58

RD/BU

Intermittent wiper, relay

Out

Activate with diagnostic tool.

58-B+

B+

Wash/wipe systems



59



No connection











60



No connection











61



No connection











62

BU

Front fog lights, switch

In

Ignition ON. Hold switch depressed (closed).

62-57

B+

Lighting and signalling systems



63

BK/YE

Front wiper, park position

In

Windscreen wiper not in parked position.

Ignition ON

63-57

B+

Wash/wipe systems



64

RD/BU

Ignition +15, logic

In

Ignition ON

64-57

B+



65

GN/WH

A/C request MCC

In

Ignition ON

Hold A/C switch depressed (closed).

65-57

B+

Heating and ventilation, A/C



66



No connection











67



No connection











68

YE

Windscreen washers, switch

In

Ignition ON. Switch activated.

68-57

B+

Wash/wipe systems



69

YE

Direction indicators LH, lamp

Out

Ignition ON. Switch to the left.

69-57

B+

Lighting and signalling systems



70

RD/WH

Reading lamp

Out

Ignition ON

70-57

B+

Lighting and signalling systems