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 each diagnostic category.
Circuit/System Description
The FUEL DOOR relay switch and coil terminals are supplied with battery voltage at all times via the DOOR CONTROLS 30-amp circuit breaker from the BATT 1 fuse. When the fuel door release switch is activated, ground is applied to the coil side of the FUEL DOOR relay. This energizes the coil causing the switch contacts to close. With the switch contacts closed, battery voltage is supplied to the fuel door release actuator, opening the fuel door. Ground for the fuel door release switch is supplied at G201 and the fuel door release actuator is provided ground at G302.
Reference Information
Schematic Reference
Release Systems Schematics (Release Systems 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)
Circuit/System Testing
1. Ignition OFF, disconnect the fuel door relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal A5 and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage.
3. Verify that a test lamp illuminates between the B+ circuit terminal A2 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal A5 for a short to ground. If the circuit tests normal, test or replace the fuel door relay.
4. Verify that a test lamp illuminates between the B+ circuit terminal A3 and ground.
• If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
5. Disconnect the harness connector at the fuel door release actuator.
6. Ignition OFF, test for less than 5.0 ohms of resistance between the fuel door release actuator ground circuit terminal B and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
7. Connect the harness connector at the fuel door release actuator.
8. Connect a 30-A fused jumper wire between the B+ circuit terminal A3 and the control circuit terminal A5. Verify the fuel door release actuator is activated.
• If the fuel door release actuator does not activate, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the fuel door release actuator.
9. Disconnect the harness connector at the fuel door release switch.
10. Ignition OFF, test for less than 5.0 ohms of resistance between the fuel door release switch ground circuit terminal A and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
11. Connect the harness connector at the fuel door release switch.
12. Connect a test lamp between the B+ circuit terminal A2 and the control circuit terminal A1.
13. Activate the fuel door release switch ON and OFF. The test lamp should turn ON and OFF as the fuel door release switch is activated.
• If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the fuel door release switch.
• If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the fuel door release switch.
14. If all circuits test normal, test or replace the fuel door relay.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (Relay Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (Relay Replacement (Within an Electrical Center))
* Fuel Tank Filler Door Lock Actuator Replacement (Service and Repair)
* Fuel Tank Filler Door Lock Release Switch Replacement (Service and Repair)