Test readings, control module connections
| Test readings, control module connections |
| Scope |
Values and directions for measuring the voltage levels in the control module are given under the relevant heading.
| Points to remember |
| • |
Note the test conditions, use common sense when assessing the test results.
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|
| • |
The specified values are with the ignition ON unless otherwise stated.
|
|
| • |
First check that the control module is supplied with current and is grounded.
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| • |
Then check all the sensor inputs and signals from other systems.
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|
| • |
Finally, check the control module outputs. Remember that the test values do not say anything about whether or not the actuator is functioning.
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|
| • |
If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which ought to be checked more thoroughly.
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|
| • |
The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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|
| • |
Test values % (+) and ms (+) indicate the pulse ratio and pulse rate of the signal respectively. A scan tool for measuring pulse ratio and pulse width respectively must be used. The (+) indicates positive trigger pulse, TRIG+.
|
|
| Connector |
> =greater than ; < = less than ; ~ = alternating current (LP: LOGIC PROBE P = select pulse ; p = visible pulses)
|
Pin no.
|
Cable colour
|
Component/
function |
In/out
|
Test conditions
|
Test between
|
Test reading
|
See
|
|
1
|
|
No connection
|
|
|
|
|
|
|
2
|
BU/RD
|
Luggage compartment lighting
|
Out
|
Boot lid/tailgate open.
|
2-57
|
B+
|
Lighting and signalling systems
|
|
3
|
OG
|
Hazard flasher, switch
|
In
|
Hold switch depressed (closed).
|
3-26
|
B+
|
Lighting and signalling systems
|
|
4
|
GN
|
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
|
BN/RD
|
Ignition +B, logic
|
In
|
Key turned in ignition switch
|
7-57
|
B+
|
|
|
8
|
|
No connection
|
|
|
|
|
|
|
9
|
GN
|
A/C pressure sensor in
|
In
|
Ignition ON
|
9-54
|
0.4-4.6V
(2-30 bar) |
Heating and ventilation, A/C
|
|
10
|
GN/GY
|
Evaporator temperature, sensor.
Power supply |
In
|
Ignition ON
|
10-30
|
6°C = 2.8-3.7V
|
Heating and ventilation, A/C
|
|
11
|
GY
|
Main beam relay
|
Out
|
Main beam, light switch in pos. 2.
Ignition ON |
11-26
|
B+
|
Lighting and signalling systems
|
|
12
|
YE
|
Headlamp wipers, relay
|
Out
|
Activate with diagnostic tool
|
26-12
|
B+
|
Wash/wipe systems
|
|
13
|
|
No connection
|
|
|
|
|
|
|
14
|
GN
|
I-bus (+).
|
In/Out
|
Bus active
|
14-57
|
2-3V
|
|
|
15
|
GN/RD
|
Light switch, pos. 2
|
In
|
Light switch in pos. 2.
Ignition ON |
15-57
|
B+
|
Lighting and signalling systems
|
|
16
|
GY/RD
|
Rear fog lights, switch
|
In
|
Light switch in pos. 2.
Ignition ON. Switch held depressed (closed). |
16-57
|
B+
|
Lighting and signalling systems
|
|
17
|
|
No connection
|
|
|
|
|
|
|
18
|
GY/BK
|
Electrically heated rear window from MCC
|
In
|
Switch held depressed (closed).
|
18-57
|
B+
|
Glass, windows and mirrors
|
|
19
|
BK/RD
|
Intermittent wiper, rear window, switch.
|
In
|
Ignition ON. Switch in intermittent position.
|
19-57
|
B+
|
Wash/wipe systems
|
|
20
|
BN/OG
|
Direction indicators LH, switch
|
In
|
Switch to the left.
|
20-57
|
B+
|
Lighting and signalling systems
|
|
21
|
BU/WH
|
Intermittent wiper, windscreen, switch.
|
In
|
Ignition ON. Switch in intermittent position.
|
21-57
|
B+
|
Wash/wipe systems
|
|
22
|
RD/WH
|
Direction indicators, power supply +30
|
In
|
Always +30.
|
22-57
|
B+
|
Lighting and signalling systems
|
|
23
|
GY/GN
|
Interior Lighting
|
Out
|
Door open
|
23-57
|
B+
|
Lighting and signalling systems
FLASH |
|
24
|
BU/RD
|
Comfort lighting in cabin, power supply +30.
|
In
|
Always +30.
|
24-57
|
B+
|
Lighting and signalling systems
|
|
25
|
BU/BN
|
Rear fog light bulb.
|
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
|
BU
|
Intermittent wiper, rear window, relay.
|
Out
|
Activate function with diagnostics instrument.
|
27-B+
|
B+
|
Wash/wipe systems
|
|
28
|
YE/BU
|
Diagnostics KW 2000
|
In/Out
|
Communication with DICE or a bus system
|
28-57
|
11V
|
|
|
29
|
YE/RD
|
Front fog lights; relay.
|
Out
|
Market dependent or activate with diagnostics instrument.
|
26-29
|
B+
|
Lighting and signalling systems
|
|
30
|
BK
|
Evaporator temperature sensor, ground
|
In
|
Always
|
26-30
|
B+
|
Heating and ventilation, A/C
|
|
31
|
BN/GY
|
Ignition +54, logic.
|
In
|
Key in “ON” position
|
31-57
|
B+
|
|
|
32
|
|
No connection
|
|
|
|
|
|
|
33
|
RD/WH
|
Intermittent wiper potentiometer, ground.
|
In
|
Always
|
26-33
|
B+
|
Wash/wipe systems
|
|
34
|
|
No connection
|
|
|
|
|
|
|
35
|
BN/RD
|
Radiator fan low speed, relay
|
Out
|
Activate function with diagnostics instrument.
|
26-35
|
B+
|
Cooling system
|
|
36
|
|
No connection
|
|
|
|
|
|
|
37
|
|
No connection
|
|
|
|
|
|
|
38
|
GN/GY
|
A/C pressure sensor, power supply
|
Out
|
Ignition ON
|
38-57
|
5V
|
Heating and ventilation, A/C
|
|
39
|
YE/GY
|
Light switch in zero position
|
In
|
Light switch in zero position. Ignition ON
|
39-57
|
B+ (fuse 15 fitted)
0V (fuse 15 not fitted) |
Lighting and signalling systems
|
|
40
|
|
Rear window wiper, parking position
|
In
|
Rear window wiper not in parked position.
Ignition ON |
40-57
|
B+
|
Wash/wipe systems
|
|
41
|
BU/WH
|
Main/dipped beam
|
In
|
Move stalk switch to farthest position
|
41-57
|
B+
|
Lighting and signalling systems
|
|
42
|
BU/YE
|
Rear window washer, switch.
|
In
|
Ignition ON. Switch activated.
|
42-57
|
B+
|
Wash/wipe systems
|
|
43
|
|
No connection
|
|
|
|
|
|
|
44
|
GY/OG
|
Direction indicators RH, switch
|
In
|
Switch to the right
|
44-57
|
B+
|
Lighting and signalling systems
|
|
45
|
WH
|
Reversing-light switch
|
In
|
Reverse gear selected/engaged.
|
45-57
|
B+
|
Lighting and signalling systems
|
|
46
|
RD
|
Map/compartment lighting, power supply +30
|
In
|
Always +30.
|
46-57
|
B+
|
Lighting and signalling systems
|
|
47
|
BK/GN
|
Right direction indicator, bulb.
|
Out
|
Switch to the right
Ignition ON |
47-57
|
B+
|
Lighting and signalling systems
|
|
48
|
RD
|
Rear fog lights, power supply +30.
|
In
|
Always +30.
|
48-57
|
B+
|
Lighting and signalling systems
|
|
49
|
GN/WH
|
Button illumination
|
Out
|
Light switch in pos. 2.
Ignition ON. Rheostat on max. |
49-57
|
PWM 3.5V to B+
|
Lighting and signalling systems
|
|
50
|
|
No connection
|
|
|
|
|
|
|
51
|
|
No connection
|
|
|
|
|
|
|
52
|
GN/RD
|
Electrically heated rear window, relay
|
Out
|
Ignition ON
Hold switch depressed (closed). |
26-52
|
B+
|
Glass, windows and mirrors
|
|
53
|
BN/GY
|
Radiator fan high speed, relay
|
Out
|
Activate function with diagnostics instrument.
|
26-53
|
B+
|
Cooling system
|
|
54
|
VT/WH
|
A/C pressure sensor, ground.
|
In
|
Always
|
26-54
|
B+
|
Heating and ventilation, A/C
|
|
55
|
WT/WH
|
Intermittent wiper, potentiometer.
|
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
|
GY/RD
|
Intermittent wiper, windscreen, relay.
|
Out
|
Activate function with diagnostics instrument.
|
58-B+
|
B+
|
Wash/wipe systems
|
|
59
|
|
No connection
|
|
|
|
|
|
|
60
|
|
No connection
|
|
|
|
|
|
|
61
|
|
No connection
|
|
|
|
|
|
|
62
|
BN/BK
|
Front fog lights, switch
|
In
|
Ignition ON
Hold switch depressed (closed). |
62-57
|
B+
|
Lighting and signalling systems
|
|
63
|
BN
|
Windscreen wipers, parking position.
|
In
|
Windscreen wiper not in parked position.
Ignition ON |
63-57
|
B+
|
Wash/wipe systems
|
|
64
|
YE/GY
|
Ignition +15, logic.
|
In
|
Ignition ON
|
64-57
|
B+
|
|
|
65
|
GY
|
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
|
GN/WH
|
Windscreen washers, switch
|
In
|
Ignition ON. Switch activated.
|
68-57
|
B+
|
Lighting and signalling systems
|
|
69
|
GY/BK
|
Direction indicators LH, lamp
|
Out
|
Ignition ON. Switch to the left.
|
69-57
|
B+
|
Lighting and signalling systems
|
|
70
|
GN/BU
|
Reading lamp
|
Out
|
Ignition ON
|
70-57
|
B+
|
Lighting and signalling systems
|
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