Diagnostic System Check
- Connect scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see appropriate
BODY CONTROL MODULES article.
- Turn ignition switch to ON position, engine off. Using scan tool, attempt to establish communication with BCM, IPC and PCM. If scan tool communicates with BCM, IPC and PCM, go to next step. If scan tool does not communicate with BCM, IPC and PCM, diagnose and repair communication problem as necessary. See appropriate
BODY CONTROL MODULES article.
- Check for BCM, IPC and PCM DTCs. If DTCs exist, go to next step. If DTCs do not exist, diagnose by symptom. See SYMPTOM TESTS .
- If no DTCs begin with "U", go to next step. If any DTCs begin with "U", see appropriate
BODY CONTROL MODULES article.
- If DTCs B1000 or B1004 exist, see appropriate
BODY CONTROL MODULES article. If DTCs B1000 or B1004 do not exist, see DIAGNOSTIC TROUBLE CODE INDEX table.
DIAGNOSTIC TROUBLE CODE INDEX
| DTC |
Description |
| B2947 |
Passlock™ Sensor Power Circuit Low |
| B2948 |
Passlock™ Sensor Power Circuit High |
| B2957 |
Passlock™ Sensor Data Circuit Low |
| B2958 |
Passlock™ Sensor Data Circuit High |
| B2960 |
Passlock™ Sensor Data Incorrect But Valid |
| B2964 |
Key In Ignition Circuit High |
| B3031 |
Controller In Learn Mode |
| B3033 |
System Indicates Tamper |