Fuel Filler Door Release Malfunction
Fuel Filler Door Release Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The locking and unlocking of the fuel door is a function of the power door lock system. The fuel door unlatch actuator shares the circuit with the door latch unlock control circuit. The body control module (BCM), upon receipt of a lock switch lock or unlock signal, will switch the appropriate door latch, as well as a fuel filler door unlatch actuator control circuits to B+ voltage. The opposing side of the door latch and fuel filler door unlatch actuator is connected to ground provided by the BCM through the other the door latch control circuits, along with the fuel filler door unlatch actuator, will lock or unlock as commanded.
Reference Information
Schematic Reference
Release Systems Schematics Release Systems Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Fuel Fill Door Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the operation of the fuel door lock actuator does not release the fuel filler door when commanding the All Doors Lock/Unlock to Lock with a scan tool.
• If the fuel door lock actuator releases the fuel filler door
Refer to Circuit/System Testing.
• If the fuel door lock actuator does not release the fuel filler door
3. Verify the operation of the fuel door unlatch actuator releases the fuel filler door when commanding the All Doors Lock/Unlock to Unlock with a scan tool.
• If the fuel door lock actuator does not release the fuel filler door
Refer to Circuit/System Testing.
• If the fuel door lock actuator releases the fuel filler door
4. All OK.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the M97 fuel door lock actuator.
2. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2, ignition ON.
3. Verify the test lamp turns ON when commanding the All Doors Lock/Unlock to Lock and Unlock with a scan tool.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, disconnect the harness connector at the K9 body control module.
2. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 body control module.
3. Test for less than 2 ohms in each control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 body control module.
• If the test lamp turns ON during each of the commands
4. Test or replace the M97 fuel door lock actuator.
Component Testing
Fuel Door Latch
1. Ignition OFF, disconnect the harness connector at the M97 fuel door lock actuator.
2. Install a 25 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M97 fuel door lock actuator should perform the LOCK and UNLOCK function.
• If the actuator does not perform the LOCK and UNLOCK function
Replace the M97 fuel door lock actuator.
• If the actuator performs the LOCK and UNLOCK function
3. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Fuel Tank Filler Pipe Housing Replacement