Body Control System Diagnostic System Check
- Connect scan tool to Data Link Connector (DLC). If scan tool powers up, go to next step. If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP .
- Turn ignition on. Attempt to establish communication with BCM. If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE .
- If any communication DTCs exist (DTCs beginning with a "U"), go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE . If no communication DTCs exist, perform appropriate test under DIAGNOSTIC TESTS . See BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE INDEX table.
BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE INDEX
| DTC (1) | Description | ||
|---|---|---|---|
| B1000 | BCM Malfunction | ||
| B1001 | Option Configuration Error | ||
| B1369 | Ignition 0 Fault | ||
| B1374 | Ignition 1 Fault | ||
| B1379 | Ignition 3 Fault | ||
| B2965 | Key In Ignition Fault | ||
| U1000 & U1255 | Class 2 Communication Malfunction | ||
| U1001-U1254 | Loss Of Communications With XXX | ||
| U1300 | Class 2 Data Link Low | ||
| U1301 | Class 2 Data Link High | ||
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