Diagnostic Routine I

Diagnostic Routine I

Diagnostic Overview

The Power Liftgate Chime Is Inoperative

Refer to Wiring Diagram Set 109 for schematic and connector information Electrical Diagrams.

Normal Operations and Fault Conditions

The LTM (Liftgate/Trunk Module) controls the power liftgate chime. To activate the chime, the LTM (Liftgate/Trunk Module) supplies a fluctuating AC voltage to the chime.

DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: LTM (Liftgate/Trunk Module) C4174B.

3. Disconnect: Power Liftgate Chime.

4. Ignition ON.

5. Measure:





Is any voltage present?








2. CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR A SHORT TO GROUND

1. Ignition OFF.

2. Measure:





Are the resistances greater than 10,000 ohms?








3. CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR AN OPEN

1. Measure:





Are the resistances less than 3 ohms?








4. CHECK FOR CORRECT LTM (Liftgate/Trunk Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all LTM (Liftgate/Trunk 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 all the LTM (Liftgate/Trunk 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?