Circuit/System Testing
IMPORTANT:
Before performing this diagnostics, make sure no indicator(s) are illuminated after the IPC performs a lamp test. If any indicators are illuminated after the bulb test, perform the indicator diagnostics before this diagnostics.
- Ignition ON, headlamp switch OFF, verify the scan tool Headlamp Switch parameter is Inactive.
- If not Inactive, refer to Headlamps Malfunction .
- Ignition ON, park lamp switch OFF, verify the scan tool Park Lamps Switch parameter is Inactive.
- If not Inactive refer to Park, License, and Tail Lamps Always On .
- Ignition ON, doors closed, verify the scan tool All Door Lock Command is On.
- If not On, refer to Courtesy Lamps Always On .
- Ignition OFF, key out of the ignition, verify the scan tool Key In Ignition Status parameter is Inactive.
- If not Inactive, test the key in ignition switch signal circuit for a short to ground. If the circuits tests normal, replace the ignition switch.