Test readings, control module connections
| Test readings, control module connections |
| Remember: |
| • |
All readings should be obtained with the use of a Breakout Box (BOB) connected between the control module and the control module connector.
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| • |
Several voltage levels should be regarded as guiding values only. Use your common sense when judging whether a particular reading is correct or not.
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| • |
If a test reading is wrong, consult the wiring diagram to find out which cables, connectors or components should be checked further.
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| • |
Page references in the table indicate the page on which the principle of operation of the signal in question is described.
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| • |
All test readings are with the engine at normal operating temperature.
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| • |
Unless otherwise stated, the ignition should be switched on.
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| • |
Specified readings apply to a calibrated FLUKE 88/97.
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Pin
|
Component/function
|
Test conditions
|
In/Out
|
Test reading
|
Between
|
|
1
|
LH DIRECT. INDIC.
|
Direction indicators activated
|
Output
|
12/0 V
|
1-70
|
|
2
|
Not used
|
|
|
|
|
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3
|
RH parking lights
|
Parking lights activated
|
Output
|
12 V
|
3-70
|
|
4
|
LH parking lights, power supply
|
Parking lights activated
|
Input
|
12 V
|
4-70
|
|
5
|
Coolant temperature sensor
|
|
Input
|
about 0-12 V
|
5-58
|
|
6
|
RH brake light
|
Brake pedal depressed
|
Output
|
12 V
|
6-70
|
|
7
|
Relay, rear wiper
|
Rear wiper activated
|
Output
|
12/0 V
|
47-7
|
|
8
|
Dipswitch relay
|
Main beam activated
|
Output
|
12 V
|
47-8
|
|
9
|
Relay, radiator fan, high speed
|
Radiator fan, high speed, activated
|
Output
|
12 V
|
47-9
|
|
10
|
Idling speed increase signal
|
Idling speed increase activated
|
Output
|
12 V
|
47-10
|
|
11
|
AC
|
AC activated
|
Output
|
12 V
|
11-70
|
|
12
|
Relay, radiator fan, low speed
|
Radiator fan, low speed, activated
|
Output
|
12 V
|
47-12
|
|
13
|
Relay, electrically heated rear seat
|
Electrically heated rear seat activated
|
Output
|
12 V
|
47-13
|
|
14
|
Coolant temperature signal (main instrument display panel 2)
|
|
Output/ PWM
|
about 122 Hz 8-92%% duty
|
14-70
|
|
15
|
Rear window washer switch
|
Rear washer button depressed
|
Input
|
12 V
|
15-70
|
|
16
|
Parking lights switch
|
Parking lights activated
|
Input
|
12 V
|
16-70
|
|
17
|
Extra fog lights switch
|
Switch, extra fog lights, activated
|
Input
|
12 V
|
17-70
|
|
18
|
LH direction indicator switch
|
LH direction indicator switch activated
|
Input
|
12 V
|
18-70
|
|
19
|
RH direction indicator switch
|
RH direction indicator switch activated
|
Input
|
12 V
|
19-70
|
|
20
|
Seat-belt warning switch
|
Seat belt not in
|
Input
|
12 V
|
47-20
|
|
21
|
Hazard flasher switch
|
Hazard flasher switch activated
|
Input
|
12 V
|
47-21
|
|
22
|
Pressure switch, AC fan
|
If pressure switch not closed, > 15 bar
|
Input
|
12 V
|
47-22
|
|
23
|
Interior lighting
|
Interior lighting on
|
Output
|
12 V
|
47-23
|
|
24
|
Power supply, direction indicators
|
Always
|
Input
|
12 V
|
24-70
|
|
Pin
|
Component/function
|
Test conditions
|
In/Out
|
Test reading
|
Between
|
|
25
|
Power supply, brake lights (brake light switch)
|
Brake pedal depressed
|
Input
|
12 V
|
25-70
|
|
26
|
High-level brake light
|
Brake pedal depressed
|
Output
|
12 V
|
26-70
|
|
27
|
LH parking lights
|
Parking lights activated
|
Output
|
12 V
|
27-70
|
|
28
|
Power supply, RH parking lights
|
Parking lights activated
|
Input
|
12 V
|
28-70
|
|
29
|
LH brake lights
|
Brake pedal depressed
|
Output
|
12 V
|
29-70
|
|
30
|
Dipswitch
|
Hold dipswitch in shift position
|
Input
|
12 V
|
30-70
|
|
31
|
"Door open" indicator lamp
|
Door open
|
Output
|
12 V
|
47-31
|
|
32
|
Relay, electrically heated seats
|
Door open or ignition on
|
Output
|
12 V
|
47-32
|
|
33
|
Relay, headlamps
|
Headlamps activated
|
Output
|
12 V
|
47-33
|
|
34
|
Power supply +15
|
Ignition, drive position
|
Input
|
12 V
|
34-70
|
|
35
|
Relay, electrically heated rear window
|
Electrically heated rear window on
|
Output
|
12 V
|
47-35
|
|
36
|
Not used
|
|
|
|
|
|
37
|
SID module communication
|
|
Output
|
about 8 V
|
37-70
|
|
38
|
Windscreen/headlamp washer switch
|
Windscreen washer activated
|
Input
|
12 V
|
38-70
|
|
39
|
Switch, intermittent wipe, front
|
Intermittent wipe activated
|
Input
|
12 V
|
39-70
|
|
40
|
Lights switch, headlamps
|
Lights switch in position 2
|
Input
|
12 V
|
40-70
|
|
41
|
Power supply +54
|
Ignition switch in drive position
|
Input
|
12 V
|
41-70
|
|
42
|
Not used
|
|
|
|
|
|
43
|
Switch, electrically heated rear seat
|
Keep switch depressed
|
Input
|
12 V
|
43-70
|
|
44
|
Driver's door
|
Driver's door closed Driver's door open
|
Input
|
0 V 12 V
|
47-44
|
|
45
|
Parking switch Wiper motor, front
|
Wipers in parked position
|
Input
|
12 V
|
47-45
|
|
Pin
|
Component/function
|
Test conditions
|
In/Out
|
Test reading
|
Between
|
|
46
|
Reading lamps
|
Always
|
Output
|
12 V
|
47-46
|
|
47
|
Power supply +30
|
Always
|
Input
|
< 0.5 V
|
B+ -47
|
|
48
|
RH direction indicators
|
RH direction indicators activated
|
Output
|
12/0 V
|
48-70
|
|
49
|
Not used
|
|
|
|
|
|
50
|
Not used
|
|
|
|
|
|
51
|
Not used
|
|
|
|
|
|
52
|
Not used
|
|
|
|
|
|
53
|
Signal ground
|
Engine running
|
Input
|
< 0.1 V
|
53-batt
|
|
54
|
Not used
|
|
|
|
|
|
55
|
Relay, extra fog lights
|
Extra fog lights activated
|
Output
|
12 V
|
47-55
|
|
56
|
Seat belt warning lamp
|
Lamp on Lamp off
|
Output
|
12 V 0 V
|
47-56
|
|
57
|
Not used
|
|
|
|
|
|
58
|
Coolant temperature sensor, grounded side
|
Always
|
Input
|
12 V
|
47-58
|
|
59
|
Relay, windscreen wiper
|
Intermittent wipe activated
|
Output
|
12/0 V
|
47-59
|
|
60
|
Diagnosis
|
Scan tool not connected Scan tool connected + contact with ICE
|
In/Out
|
0 V 12 V
|
60-70
|
|
61
|
Coolant temperature signal (main instrument display panel 1)
|
|
Output
|
500 Hz 8-92%% duty
|
61-70
|
|
62
|
Rear wiper, intermittent operation
|
Rear intermittent wipe activated
|
Input
|
12 V
|
62-70
|
|
63
|
Lights off
|
Dipswitch in position 0
|
Input
|
12 V
|
63-70
|
|
64
|
AC
|
AUTO on ACC or AC activation
|
Input
|
12 V
|
64-70
|
|
65
|
Power supply B
|
Key in position B
|
Input
|
12 V
|
65-70
|
|
66
|
REAR WINDOW HEATER
|
Electrically heated rear window switch activated *)
|
Input
|
12 V
|
66-70
|
|
67
|
Passenger doors
|
All passenger doors closed One open
|
Input
|
0 V 12 V
|
47-67
|
|
68
|
Not used
|
|
|
|
|
|
69
|
Pressure switch, AC
|
Pressure switch closed > 22 bar
|
Input
|
12 V
|
47-69
|
|
70
|
Power ground
|
Engine running
|
Input
|
< 0.1 V
|
70-batt
|
*) ACC: Sends only one 100 ms current pulse which can be measured with an instrument indicating maximum value.
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