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Test readings, control module connections

Test readings, control module connections


Test readings and instructions for measuring voltage levels on the main instrument unit and its control module are given below.

Remember:


• Readings should be taken via a BreakOut Box (BOB) connected between the control module and its connector.

• Several voltage levels should be regarded as guiding values only. Use your common sense when judging whether a particular reading is correct or not.

• If a test reading is wrong, consult the wiring diagram to find out which cables, connectors or components should be checked further.

• Pages referred to in the table contain a technical description of the signal in question.

• All test readings are with the engine at normal operating temperature.

• Unless otherwise stated, the ignition should be switched on.

• Specified readings refer to calibrated FLUKE 88/97.


Pin

Component/function

Test conditions

In/Out

Test reading

Between

See

1

Handbrake warning lamp

Handbrake off Handbrake on

Input

0 V 12 V

55-1



2

SRS warning lamp (central warning lamp)

Lamp out SRS OK

Input

approx. 1 V

55-2



3

SI-BUS -



In/Out

2.5 V

3-43



4

SI-BUS +



In/Out

2.5 V

4-43



5

Speed signal

Spin LH rear wheel 1/2 rev per sec.

Input

approx. 15 Hz

5-43



6

Rpm signal

Idling

Input

approx. 30 Hz (4-cyl.) approx. 40 Hz (6-cyl.)

6-43



7

Coolant temperature, signal



Input

122 Hz

7-43



8

Fuel contents, signal

Idling

Input

about 7 Hz

8-43



9

Turbo pressure signal

Ignition on

Input

approx. 1 V

9-10



10

Turbo pressure, ground

Idling

Input

12 V

55-10



11

Fuel level signal



Input

approx. 0-5 V

11-43



12

Fuel level, ground signal



Input

12 V

55-12



13

Indicator lamp EXH

On Off



12 V 0 V

13-43



14

Not used











15

Charging indicator lamp

Ignition on Engine running

Input

12 V 0 V

55-15



16

Warning lamp ABS (ANTI-LOCK)

On Off

Input

12 V 0 V

55-16



17

Warning lamp Oil pressure

On Off

Input

12 V 0 V

55-17



18

Warning lamp Brake fluid

Engine running Low Normal

Input

12 V 0 V

55-18



19

SRS 1+

Ignition on

Input

12 V

19-43



20

TCS OFF warning lamp

On Off

Input

12 V 0 V

55-20





Pin

Component/function

Test conditions

In/Out

Test reading

Between

See page

21

Repeater lamp direction indicators, RH

On Off

Input

12 V 0 V

21-43



22

CHECK ENGINE warning lamp (MIL)

On Off

Input

12 V 0 V

55-22



23

SPORT mode indicator lamp

On Off

Input

12 V 0 V

55-23



24

Reserved











25

Reserved











26

Warning lamp, SRS 1

On Off

Input

12 V 0 V

55-26



27

CHECK ACS warning lamp

On Off

Input

12 V 0 V

55-27



28

CHECK GEARBOX warning lamp

On Off

Input

12 V 0 V

55-28



29

Not used











30

Not used











31

Not used











32

Not used











33

Not used











34

Not used











35

Not used











36

Not used











37

Main beam indicator lamp

On Off

Input

12 V 0 V

37-43



38

Warning lamp Door open

On Off

Input

12 V 0 V

55-38



39

Indicator lamp SHIFT UP

On Off

Input

12 V 0 V

55-39



40

Reserved













Pin

Component/function

Test conditions

In/Out

Test reading

Between

See page

41

TCS indicator lamp

On Off

Input

12 V 0 V

55-41



42

WINTER mode indicator lamp

On Off

Input

12 V 0 V

55-42



43

Signal ground

Ignition on

Input

< 0.1 V

43-B-



44

Not used











45

Not used











46

Not used











47

Not used











48

Not used











49

Not used











50

Indicator lamp, Cruise Control CRUISE

On Off

Input

12 V 0 V

50-43



51

Repeater lamp, direction indicators

On Off

Input

12 V 0 V

51-43



52

Indicator lamp Rear fog light

On Off

Input

12 V 0 V

52-43



53

Lights-on indicator lamp

On Off

Input

12 V 0 V

53-43



54

Reserved







54-43



55

+ 15

Ignition on

Input

< 0.5 V

B+ -55



56

+ 30

Ignition on

Input

< 0.5 V

B+ -56