Refer to Body Control Modules in System Wiring Diagrams .
Body Control Module (BCM) C1 Connector End Connector Part Information 12084945 16-Way F Micro-Pack 100 Series (GY) Pin Wire Color Circuit Number Function A1 - - Not Used A2 L-GN 1391 Driver Door Unlock Relay Control (w/AU0) A3 L-BU 195 Door Lock Relay Control (w/AU0) A4 WH 194 Door Unlock Relay Control (w/AU0) A5-A6 - - Not Used A7 OG/BK 781 Driver Door Lock Switch Unlock Signal (w/AU0) A8 RD/BK 780 Driver Door Lock Switch Lock Signal (w/AU0) B1 - - Not Used B2 D-BU 1201 Headlamp Low Beam Signal B3 - - Not Used B4 GY 731 EVAP Temperature Sensor Signal B5 L-GN/BK 1137 DRL Ambient Light Sensor Signal (w/HAA) B6 YE/BK 1138 DRL Ambient Light Sensor Low Referencel (w/HAA) B7 - - Not Used B8 L-GN 66 A/C Request Signal
Body Control Module (BCM) C2 Connector End Connector Part Information 12110088 24-Way F Micro-Pack 100 Series (GY) Pin Wire Color Circuit Number Function A1 - - Not Used A2 L-BU 1134 Park Brake Switch Signal A3 PK 1200 Headlamp High Beam Signal A4 - - Not Used A5 PU 333 Brake Fluid Level Switch Signal A6 BN 96 Windshield Wiper Switch Pulse Delay Signal A7 - - Not Used A8 PK 94 Windshield Washer Switch Signal A9 RD 228 Windshield Washer Pump Control A10 PK 339 Ignition 1 Voltage A11 L-GN 80 Key In Ignition Switch Signal A12 BK/WH 746 Passenger Doors Ajar Switch Signal B1 YE 749 Security Indicator Control B2 GY/BK 745 Left Front Door Ajar Switch Signal B3 L-BU 292 Rear Defog Switch Signal B4 RD/BK 744 Liftgate Ajar Switch Signal B5 D-GN 392 Rear Window Washer Switch Signal B6 L-BU 74 Park Lamp Switch Signal (w/ T82/HAA) B7 OG 192 Fog Lamp Switch Signal (w/ T96) B8 - - Not Used B9 YE 743 Accessory Voltage B10 BN 9 Park Lamp Supply Voltage B11 L-GN 1478 Coolant Level Switch Signal B12 PU 719 Low Reference
Body Control Module (BCM) C3 Connector End Connector Part Information 12110244 24-Way F Micro-Pack 100 Series (PK) Pin Wire Color Circuit Number Function A1 WH 156 Dome Lamp Control A2 RD/WH 812 12 Volt Reference A3 WH 352 Headlamp Relay Coil Supply Voltage(w/ T82/HAA) A4 YE 317 Fog Lamp Relay Control (w/ T96) A5 OG/BK 1445 BCM Program Enable Signal A6 RD 2445 Rear Wiper Relay Control A7 WH 1080 Park Lamp Relay Control (w/ T82/HAA) A8 L-GN/BK 592 DRL Relay Control A9 BN/WH 230 I/P Lamps Dimming Control A10 PU 1807 Class 2 Serial Data A11 - - Not Used A12 TN 2501 CAN Low B1 TN/WH 816 A/T Shift Lock Switch Signal B2 BK 28 Horn Relay Control B3 OG/BK 1057 Low Reference B4 GY 112 Windshield Wiper Switch Signal 1 B5 TN 470 Low Reference B6 WH 193 Rear Defog Relay Control B7 YE 1836 Security System Sensor Signal B8 D-GN 113 Windshield Wiper Switch Signal 2 B9 PU 1807 Class 2 Serial Data B10 PU 1807 Class 2 Serial Data B11 - - Not Used B12 TN/WH 2500 CAN High
Body Control Module (BCM) C4 Connector End Connector Part Information 12110626 8-Way F Metri-Pack 280 Series (GY) Pin Wire Color Circuit Number Function A OG 1732 Courtesy Lamps Supply Voltage B-C - - Not Used D OG 2540 Battery Positive Voltage E GY 8 I/P Lamps Dimmer Switch Signal F BK/WH 151 Ground G - - Not Used H OG 1640 Battery Positive Voltage
Begin the diagnosis of the body control system by performing the Diagnostic System Check for the system in which the customer concern is apparent. The Diagnostic System Check will direct you to the correct procedure for diagnosing the system and where the procedure is located.
Test Description
The number below refers to the step number on the diagnostic table.
- 3: If DTC B1001 is set as current, reprogram the module.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Body Control System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check for the system exhibiting the symptom? | Go to Step 2 | Go to Control Module References for the applicable Diagnostic System Check |
| 2 | Install the scan tool. Turn ON the ignition, with the engine OFF. Retrieve the DTCs. Is the DTC retrieved as current? | Go to Step 3 | Go to Diagnostic Aids |
| 3 | Perform the programming or set up procedure for the module. Refer to Control Module References for the proper procedure. Does the DTC reset? | Go to Step 4 | System OK |
| 4 | IMPORTANT: Perform the programming or setup procedure for the replaced control module. Replace the module. Refer to Control Module References for applicable replacement procedure.Did you complete the replacement? | System OK | |
| IMPORTANT |
|---|
| Perform the programming or setup procedure for the replaced control module. |
DTC B1001
Scheme 5
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step tests the inactive signal circuit for an open or a high resistance.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Body Control System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check for the system exhibiting the symptom? | Go to Step 2 | Go to Control Module References for the applicable Diagnostic System Check |
| 2 | Turn ON the ignition, with the engine OFF. With a scan tool, observe the Ignition 1 Input parameter in BCM security data display. Does the Ignition 1 Input parameter display High? | Go to Diagnostic Aids | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the body control module (BCM) connector C2. Turn ON the ignition, with the engine OFF. Connect a test lamp between the inactive ignition 1 voltage signal circuit and a good ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
| 4 | Inspect for poor connections and terminal tension at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
| 5 | Repair the inactive ignition 1 voltage signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 7 | |
| 6 | IMPORTANT: Perform the programming or set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration. Replace the BCM. Refer to Body Control Module Replacement for applicable replacement procedure.Did you complete the replacement? | Go to Step 7 | |
| 7 | Use a scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| Perform the programming or set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration. |
DTC B1372
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step tests the inactive signal circuit for an open or a high resistance.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Body Control System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check for the system exhibiting the symptom? | Go to Step 2 | Go to Control Module References for the applicable Diagnostic System Check |
| 2 | Turn ON the ignition, with the engine OFF. With a scan tool, observe the Ignition 2 Input parameter in BCM security data display. Does the Ignition 2 Input parameter display High? | Go to Diagnostic Aids | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the body control module (BCM) connector C2. Turn ON the ignition, with the engine OFF. Connect a test lamp between the inactive accessory voltage signal circuit and a good ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
| 4 | Inspect for poor connections and terminal tension at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
| 5 | Repair the inactive accessory voltage signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 7 | |
| 6 | IMPORTANT: Perform the programming or set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration. Replace the BCM. Refer to Body Control Module Replacement for applicable replacement procedure.Did you complete the replacement? | Go to Step 7 | |
| 7 | Use a scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| Perform the programming or set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration. |
DTC B1382
See also:
• Service Programming System (SPS)