Diagnostic Routine H
Diagnostic Routine H
Diagnostic Overview
The Start-Stop Switch Illumination Is Inoperative or Always On - Intelligent Access (IA)
Refer to Wiring Diagram Set 71 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
REFER to Dimmable Backlighting .
NOTE: The start/stop switch illumination is ground side switched by the BCM (Body Control Module).
DTC Fault Trigger Conditions
Pinpoint Test
1. VERIFY ILLUMINATION OPERATION
1. Ignition ON.
2. Place the headlamp switch in the PARKING LAMPS ON position.
3. Monitor the illumination level of the start/stop switch and a non-networked (hard-wired) illumination source such as an overhead lamp switch.
4. Place the headlamp switch in the OFF position while monitoring the illumination level of both switches.
Does the illumination for both switches operate incorrectly?
2. CHECK FOR ILLUMINATION GROUND AT THE START/STOP SWITCH
1. Ignition OFF.
2. Disconnect: Start/Stop Switch.
3. Ignition ON.
4. Press and hold the instrument panel dimmer switch to the full illumination position.
5. Measure:
Is the voltage greater than 11 volts?
3. CHECK THE ILLUMINATION GROUND CIRCUIT FOR AN OPEN
1. Ignition OFF.
2. Disconnect: BCM (Body Control Module) C2280C.
3. Measure:
Is the resistance less than 3 ohms?
4. CHECK THE ILLUMINATION GROUND CIRCUIT FOR A SHORT TO GROUND
1. Ignition OFF.
2. Disconnect: BCM (Body Control Module) C2280C.
3. Measure:
Is the resistance greater than 10,000 ohms?
5. CHECK FOR CORRECT BCM (Body Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all the BCM (Body Control Module) connectors.
3. Repair:
- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins- install new pins as necessary
4. Reconnect the BCM (Body Control Module) connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
