• | 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 each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
FUEL/DR/RELSE Relay Coil B+ | 1 | 1 | 1 | -- |
FUEL/DR/RELSE Relay Switch B+ | 1 | 1 | 1 | -- |
Fuel Door Actuator Control | 1 | 1 | 1 | -- |
Spare Relay Coil Control | 1 | 1 | 1 | -- |
FUEL/DR/RELSE Relay Ground | -- | 1 | -- | -- |
1. Fuel Door Release Malfunction |
The FUEL/DR/RELSE relay switch and relay coil is supplied with B+ at all times via the DR/LCK fuse. The locking and unlocking of the fuel door is a function of the power door lock system. When the vehicles doors are unlocked, the body control module (BCM) will respond by applying voltage to the FUEL/DR/RELSE relay coil control circuit. This energizes the coil causing the switch contacts to close. With the switch contacts closed, B+ is supplied to the fuel door release actuator, unlocking the fuel door.
Fuel Fill Door Description and Operation
• | Circuit Testing |
• | Wiring Repairs |
Control Module References for scan tool information
Observe the operation of the power door locks while using the power door lock switch. All doors should LOCK and UNLOCK as commanded.
⇒ | If the power door locks do not lock and unlock, refer to Power Door Latch System Malfunction. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the FUEL/DR/RELSE relay. |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the LCK relay. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the FUEL/DR/RELSE relay. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the LCK relay. |
⇒ | If not within the specified range, replace the relay. |
• | 30 and 86 |
• | 30 and 87 |
• | 30 and 85 |
• | 85 and 87 |
⇒ | If not the specified value, replace the relay. |
⇒ | If greater than the specified range, replace the relay. |
Important: When performing the following tests, make sure that the device is not all ready in the position the test is attempting to produce.
⇒ | If the function does not perform as specified, replace the fuel door release actuator. |
⇒ | If the function does not perform as specified, replace the fuel door release actuator. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |