Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of the diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Fuel Door Latch Lock Control | 1 | 1 | 1 | -- |
Fuel Door Latch Unlock Control | 1 | 1 | 1 | -- |
1. Fuel Door Latch Inoperative | ||||
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
Connector End View Reference
Description and Operation
Fuel Fill Door Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References 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
- Ignition OFF, disconnect the harness connector at the fuel door latch actuator.
- Connect a test lamp between control circuit terminal 1 and control circuit terminal 2.
- 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 all circuits test normal, test or replace the fuel door latch actuator.
| ⇒ | 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. |
Component Testing
- Ignition OFF, disconnect the harness connector at the fuel door latch actuator.
- 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.
- 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. |
| ⇒ | If the function does not perform as specified, replace the fuel door latch actuator. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Fuel Tank Filler Door Lock Actuator Replacement
Control Module References for rear fuse block replacement, setup, and programming
