System Tests: Notes
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Electronic modules are sensitive to static electrical charges. Proper grounding of technician and workplace is essential to prevent damage.
NOTE:
DO NOT replace Body Control Module (BCM) unless a DTC remains current after all DTC repairs have been performed. DO NOT replace BCM if only history DTCs are set.
NOTE:
Always check module ground and power circuits prior to replacing a control module. See GROUND DISTRIBUTION and/or POWER DISTRIBUTION articles in WIRING DIAGRAMS.
SYMPTOM INDEX
| Symptom | Perform System Test |
|---|---|
| Retained Accessory Power Inoperative | A |
| Retained Accessory Power On After Time-Out | B |
| Scan Tool Does Not Communicate With Class 2 Device | C |
| Scan Tool Does Not Power Up | D |
| Power Mode Mismatch | E |