Diagnostic Routine AK

Diagnostic Routine AK

Diagnostic Overview

The Chime Sounds When The Driver Door Is Ajar (No Key In Ignition And Headlamps Off)

Refer to Wiring Diagram Set 13 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Key-In-Ignition Warning Chime and REFER to Headlamps On Warning Chime .

BCM (Body Control Module) DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK THE EXTERIOR LIGHTING

1. Ignition ON.

2. Place the headlamp switch in the OFF position.

3. Close all doors.

4. Wait one minute.

5. Observe the exterior lights.

Are the headlamps off?







2. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE BCM (Body Control Module) SELF-TEST

1. Using a scan tool, perform the BCM (Body Control Module) self-test.

Are any DTCs (Diagnostic Trouble Codes) present?







3. CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE

1. Ignition OFF.

2. Remove the key from the ignition cylinder.

3. Disconnect: BCM (Body Control Module) C2280C.

4. Measure:





Is any voltage present?







4. CHECK KEY-IN-IGNITION INPUT CIRCUIT FOR A SHORT TO VOLTAGE

1. Disconnect: Ignition Switch.

2. Measure:





Is any voltage present?







5. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all 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?