Fuel Filler Door Release Inoperative

Fuel Filler Door Release Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of the diagnostic category.



Diagnostic Fault Information






Circuit/System Description

The rear fuse block, upon receipt of a lock switch lock or unlock signal, will switch the fuel filler door release actuator control circuits to battery positive voltage. The opposing side of the fuel filler door release actuator is connected to ground provided by the rear fuse block through the other door lock actuator control circuit and will lock or unlock as commanded.


Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Fuel Fill Door Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

Ignition ON, command the doors to LOCK and UNLOCK with a scan tool. All doors and the fuel filler door should LOCK and UNLOCK when changing between the commanded states.


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the fuel door latch actuator.
2. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2.
3. Ignition ON, command the door locks to LOCK and UNLOCK with a scan tool. The test lamp should illuminate while commanding the LOCK and UNLOCK states.

• If the test lamp is always ON, test either control circuit for a short to voltage. If the circuit tests normal, replace the rear fuse block.
• If the test lamp remains OFF, test either control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the rear fuse block.

4. If all circuits test normal, test or replace the fuel door latch actuator.



Component Testing

1. Ignition OFF, disconnect the harness connector at the fuel door latch actuator.
2. Install a 15A fused jumper wire between the lock control terminal 1 and 12 volts. Momentarily install a jumper wire between the unlock control terminal 2 and ground. The fuel door latch actuator should perform the LOCK/UNLOCK function.

• If the function does not perform as specified, replace the fuel door latch actuator.

3. Reverse the jumper wires. The fuel door latch actuator should perform the UNLOCK/LOCK function.

• If the function does not perform as specified, replace the fuel door latch actuator.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Fuel Tank Filler Door Lock Actuator Replacement (Service and Repair)


Control Module References (Programming and Relearning) for rear fuse block replacement, setup, and programming