Diagnostic Routine H

Diagnostic Routine H

Diagnostic Overview

The Delayed Accessory Does Not Turn Off

Refer to Wiring Diagram Set 100 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The accessory delay relay is controlled by the BCM (Body Control Module). REFER to Delayed Accessory Power for normal system operation.

DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- Visually inspect the accessory delay relay.

Pinpoint Test

1. CHECK FOR STUCK/STICKING ACCESSORY DELAY RELAY

1. Disconnect: Accessory Delay Relay.

Do the power windows still operate?








2. CHECK THE ACCESSORY DELAY RELAY

1. Carry out the accessory delay relay component test.

Did the accessory delay relay pass the component test?








3. CHECK THE DELAYED ACCESSORY RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280D.

3. Disconnect: LH (Left Hand) Front Window Control Switch C535B (Base) or C504 (XLT or Limited).

4. Ignition ON.

5. Measure:





Is any voltage present?








4. 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 as necessary
- 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?