| Scope |
| Note | ||
When measuring values at the pins the connector must remain plugged into the electrical centre. The pins can be accessed by lifting up the protective cover on the connector. |
| Remember: |
| • | Pay attention to the measurement requirements, use common sense when judging the measurement result. | |
| • | Check first that there is a voltage supply to the control module and that it is grounded. | |
| • | Then check all sensor inputs and signals from other systems. | |
| • | Lastly check the outputs of the control module. Remember that the output values do not say anything about the functioning of the related actuator.
| |
| • | If any measurement value is incorrect, use the wiring diagram to determine which cables, connectors or components should also be checked. | |
| • | The given measurement values are as measured with a calibrated Fluke 88/97. | |
| • | The measurement values %(+) and ms(+) show respectively the pulse ratio and the pulse length. A test instrument with pulse ratio and pulse width measurement must be used. The plus sign (+) denotes a positive trigger pulse, TRIG+.
| |
| Connector Body 1 to main wiring harness |
Connector section A (in the diagram = B1-A)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Door control module, RL and RR |
|
Out |
Ignition on |
1 to B- |
B+ |
|
2 |
DVD unit |
|
Out |
Ignition on |
2 to B- |
B+ |
|
3 |
Entry point junction to T-A pin 2 |
microswitch, boot lid lock - BCM |
|
|
|
|
|
4 |
Control module, TPS |
|
Out |
Ignition on |
4 to B- |
B+ |
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Entry point junction to H2 pin 3 |
interior lighting - BCM |
|
|
|
|
|
9 |
Entry point junction to H2 pin 4 |
interior lighting - BCM |
|
|
|
|
Connector section B (in the diagram = B1-B)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Not connected |
|
|
|
|
|
|
4 |
AMP2 |
|
Out |
Ignition on |
4 to B- |
B+ |
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Entry point junction to TR-WH pin 4 |
trailer connection - IPRC |
|
|
|
|
Connector section C (in the diagram = B1-C)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Entry point junction to H2 pin 1 |
interior lighting - BCM |
|
|
|
|
|
2 |
Electrical heating, RH front seat |
|
|
Ignition on/off |
2 to B- |
B+/0V |
|
3 |
Electrical heating, LH front seat |
|
|
Ignition on/off |
3 to B- |
B+/0V |
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Not connected |
|
|
|
|
|
Connector section D (in the diagram = B1-D)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Not connected |
|
|
|
|
|
|
4 |
Entry point junction to T-A pin 6 |
4D. OnStar CV: microswitch, load holder - STC |
|
|
|
|
|
5 |
Rear CD changer |
|
|
Ignition on |
5 to B- |
B+ |
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Not connected |
|
|
|
|
|
|
9 |
Not connected |
|
|
|
|
|
| Connector Body 2 to main wiring harness |
Connector section A (in the diagram = B2-A)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Not connected |
|
|
|
|
|
|
4 |
I-bus |
|
In |
Ignition on |
4 to B- |
0.3 - 0.5 V. Test lamp should blink |
|
5 |
I-bus |
|
Out |
Ignition on |
5 to B- |
0.3 - 0.5 V. Test lamp should blink |
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Entry point junction to H2 pin 3 |
interior lighting |
|
|
|
|
|
9 |
Entry point junction to H1 pin 15 |
anti-theft alarm sensor - BCM |
|
|
|
|
|
10 |
Not connected |
|
|
|
|
|
|
11 |
Not connected |
|
|
|
|
|
|
12 |
Not connected |
|
|
|
|
|
Connector section B (in the diagram = B2-B)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Entry point junction to H1 pin 11 |
anti-theft alarm sensor - BCM |
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Entry point junction to T-B pin 3 |
crash signal - ACM |
|
|
|
|
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Entry point junction to T-B pin 1 |
microswitch, boot lid handle - BCM |
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Not connected |
|
|
|
|
|
|
9 |
Not connected |
|
|
|
|
|
|
10 |
Not connected |
|
|
|
|
|
|
11 |
Not connected |
|
|
|
|
|
|
12 |
Not connected |
|
|
|
|
|
Connector section D (in the diagram = B2-D)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Not connected |
|
|
|
|
|
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Brake light switch |
|
In |
Brake lights on |
5 to B- |
B+ |
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Not connected |
|
|
|
|
|
|
9 |
Ignition switch module, |
|
In |
Ignition on/off |
9 to B- |
12 V/0 V |
|
10 |
Entry point junction to R-A pin 7 |
locking, fuel filler flap - BCM |
|
|
|
|
|
11 |
Entry point junction to R-A pin 6 |
unlocking, fuel filler flap - BCM |
|
|
|
|
|
12 |
Entry point junction to R-A pin 5 |
anti-theft-alarm siren - BCM |
|
|
|
|
| Connector Body 3 (in the diagram = B3) to main wiring harness |
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
+30-supply |
|
In |
|
1 to B- |
B+ |
|
2 |
+30-supply |
|
In |
|
2 to B- |
B+ |
|
3 |
+30-supply |
|
In |
|
3 to B- |
B+ |
|
4 |
Electrically adjustable seats |
|
Out |
Ignition on |
4 to B- |
B+ |
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Door control module, RL |
|
Out |
|
6 to B- |
B+ |
|
7 |
Door control module, RR |
|
Out |
|
7 to B- |
B+ |
|
8 |
Seats |
|
Out |
|
8 to B- |
B+ |
|
9 |
Not connected |
|
|
|
|
|
| Connector Head 1 (in the diagram = H1) to roof wiring harness |
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Entry point junction to T-C pin 8 |
microphone cable screen (4D) |
|
|
|
|
|
2 |
Entry point junction to T-C pin 7 |
microphone+ (4D) |
|
|
|
|
|
3 |
Entry point junction to T-C pin 5 |
microphone (4D) |
|
|
|
|
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Sunroof module |
|
Instrument bus |
|
|
|
|
7 |
Interior lightning, sunroof module |
|
In |
Ignition on |
7 to B- |
B+ |
|
8 |
+ 30 power supply, sunroof module |
|
Out |
Ignition on |
8 to B- |
B+ |
|
9 |
Not connected |
|
|
|
|
|
|
10 |
+ 30 power supply, anti-theft alarm |
|
Out |
Ignition on |
10 to B- |
B+ |
|
11 |
Entry point junction to B2-B pin 1 |
anti-theft alarm sensor - BCM |
|
|
|
|
|
12 |
Sunroof module |
|
In |
Ignition on |
12 to B+ |
B+ |
|
13 |
Not connected |
|
|
|
|
|
|
14 |
Not connected |
|
|
|
|
|
|
15 |
Entry point junction to B2-A pin 9 |
anti-theft alarm sensor - BCM (signal) |
|
|
|
|
|
16 |
Not connected |
|
|
|
|
|
| Connector Head 2 (in the diagram = H2) to roof wiring harness |
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Entry point junction to B1-C pin 1 |
interior lighting |
|
|
|
|
|
2 |
+15 power supply, rain sensor |
|
Out |
Ignition on |
2 to B- |
B+ |
|
3 |
Entry point junction to B1-A pin 8 |
interior lighting |
|
|
|
|
|
4 |
Entry point junction to B1-A pin 9 |
interior lighting |
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Not connected |
|
|
|
|
|
|
9 |
Ground, rain sensor |
|
In |
|
9 to B+ |
B+ |
|
10 |
+15 power supply ADM |
|
Out |
Ignition on |
10 to B- |
B+ |
|
11 |
Reversing lights |
|
|
Ignition on. Reversing lights on. |
11 to B- |
B+ |
|
12 |
Not connected |
|
|
|
|
|
|
13 |
Not connected |
|
|
|
|
|
|
14 |
Not connected |
|
|
|
|
|
|
15 |
Elevated brake lights |
|
Out |
Ignition on. Elevated brake lights activated with Tech 2 |
15 to B- |
B+ |
|
16 |
Not connected |
|
|
|
|
|
|
17 |
Not connected |
|
|
|
|
|
|
18 |
Not connected |
|
|
|
|
|
|
19 |
Not connected |
|
|
|
|
|
|
20 |
Not connected |
|
|
|
|
|
|
21 |
Not connected |
|
|
|
|
|
|
22 |
Not connected |
|
|
|
|
|
|
23 |
Not connected |
|
|
|
|
|
|
24 |
Rain sensor |
|
|
|
|
|
| Rear connector to rear wiring harness |
Connector section A (in the diagram = R-A)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
+30-supply |
|
Out |
|
1 to B- |
B+ |
|
2 |
Luggage compartment lighting (CV) |
|
|
|
|
|
|
3 |
Signal ground |
|
Out |
|
3 to B+ |
B+ |
|
4 |
Instrument bus |
|
|
|
|
|
|
5 |
Entry point junction to B2-D pin 12 |
Anti-theft-alarm siren |
|
|
|
|
|
6 |
Entry point junction to B2-D pin 11 |
fuel filler flap solenoid |
|
|
|
|
|
7 |
Entry point junction to B2-D pin 10 |
fuel filler flap solenoid |
|
|
|
|
|
8 |
Not connected |
|
|
|
|
|
|
9 |
+30 siren |
|
Out |
|
9 to B- |
B+ |
Connector section B (in the diagram = R-B)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Power ground |
|
Out |
|
1 to B+ |
B+ |
|
2 |
Power ground |
|
Out |
|
2 to B+ |
|
|
3 |
Not connected |
|
|
|
|
|
Connector section D (in the diagram = R-D)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Brake/tail light LH |
|
Out |
Brake light activated or lighting on |
2 to B- |
B+ |
|
3 |
Not connected |
|
|
|
|
|
|
4 |
Brake/tail light RH |
|
Out |
Brake light activated or lighting on |
4 to B- |
B+ |
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Direction indicators RH |
|
|
Direction indicators RH activated/ lighting on |
6 to B- |
test lamp blinks |
|
7 |
Not connected |
|
|
|
|
|
|
8 |
Direction indicators LH |
|
|
Direction indicators RH activated/ lighting on |
8 to B- |
test lamp blinks |
|
9 |
Not connected |
|
|
|
|
|
|
10 |
Rear parking light RH |
|
|
Tail light RH activated with Tech 2 |
10 to B- |
B+ |
|
11 |
Not connected |
|
|
|
|
|
|
12 |
Rear parking light LH |
|
|
Tail light LH activated with Tech 2 |
12 to B- |
B+ |
| Connector Tail to parcel shelf wiring harness (4D) or rear wiring harness (CV) |
Connector section A (in the diagram = T-A)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Entry point junction to B1-A pin 3 |
boot lid microswitch |
|
|
|
|
|
3 |
Not connected |
|
|
|
|
|
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Entry point junction to B1-D pin 4 |
4D: OnStar CU CV: microswitch, load holder |
|
|
|
|
|
7 |
CU/PU |
|
Out |
Ignition on |
7 to B- |
B+ |
|
8 |
Not connected |
|
|
|
|
|
|
9 |
Luggage compartment lighting |
|
Out |
Ignition on. Luggage compartment lighting on. |
9 to B- |
B+ |
Connector section B (in the diagram = T-B)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Entry point junction to B2-B pin 6 |
centrally operated lock, boot lid |
|
|
|
|
|
2 |
Not connected |
|
|
|
|
|
|
3 |
Entry point junction to B2-B pin 6 |
crash signal CU |
|
|
|
|
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Not connected |
|
|
|
|
|
|
6 |
Not connected |
|
|
|
|
|
|
7 |
Rear seat backrest |
|
Out |
Backrest RH locked/lowered |
7 to B- |
5 V/3.5 V |
|
8 |
Rear seat backrest LH |
|
Out |
Backrest LH locked/lowered |
8 to B- |
5 V/3.5 V |
|
9 |
Not connected |
|
|
|
|
|
|
10 |
Number plate lighting |
|
Out |
Number plate lighting activated or with Tech 2 |
10 to B- |
B+ |
|
11 |
Reversing light RH |
|
Out |
Reverse gear selected. Ignition on. |
1 to B- |
B+ |
|
12 |
Not connected |
|
|
|
|
|
Connector section C (in the diagram = T-C)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Reversing lights LH |
|
Out |
Reverse gear selected. Ignition on. |
1 to B- |
B+ |
|
2 |
Rear fog lights |
|
Out |
Rear fog light activated or with Tech 2 |
2 to B- |
B+ |
|
3 |
Boot lid lock (unlocking) |
|
Out |
Ignition on. Locking/unlocking |
3 to B- |
0/0.2 V |
|
4 |
Not connected |
|
|
|
|
|
|
5 |
Entry point junction to H1 pin 3 |
microphone+ to CU (4D) |
|
|
|
|
|
6 |
Boot lid lock (ground) |
|
In |
Ignition on |
6 to B- |
0.2 V |
|
7 |
Entry point junction to H1 pin 2 |
microphone to CU (4D) |
|
|
|
|
|
8 |
Entry point junction to H1 pin 1 |
microphone cable screen (4D) |
|
|
|
|
|
9 |
Not connected |
|
|
|
|
|
Connector section D (in the diagram = T-D)
| Pin | Component/Function | Component | In/Out | Measurement requirement. | Measure between | Measurement value |
|
1 |
Not connected |
|
|
|
|
|
|
2 |
Antenna amplifier |
|
In |
Ignition on |
2 to B+ |
B+ |
|
3 |
Power ground |
|
In |
|
3 to B+ |
B+ |