Rear Spoiler Motor Failure

WHEN MONITORED
Continuous.

SET CONDITION
The Body Control Module (BCM) reports a Rear Spoiler Motor failure.

POSSIBLE CAUSES
- Rear spoiler driver (up) circuit shorted to voltage
- Rear spoiler driver (down) circuit shorted to voltage
- Rear spoiler driver (up) circuit shorted to ground
- Rear spoiler driver (down) circuit shorted to ground
- Rear spoiler driver (up) circuit open
- Rear spoiler driver (down) circuit open
- Rear spoiler motor

Diagnostic Test




1. MEASURE THE RESISTANCE OF THE REAR SPOILER DRIVER (UP) CIRCUIT

Turn the ignition off.
Disconnect the BCM harness connector.
Disconnect the Rear Spoiler Motor harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the Rear Spoiler Driver (Up) circuit from the BCM harness connector to the Rear Spoiler Motor harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 2
NO: Repair the Rear Spoiler Driver (Up) circuit for an open. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test




2. MEASURE THE RESISTANCE OF THE REAR SPOILER DRIVER (DOWN) CIRCUIT

Measure the resistance of the Rear Spoiler Driver (Down) circuit from the BCM harness connector to the Rear Spoiler Motor harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 3
NO: Repair the Rear Spoiler Driver (Down) circuit for an open. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test




3. MEASURE THE VOLTAGE OF THE REAR SPOILER DRIVER (UP) CIRCUIT

Turn the ignition on.
Measure the voltage of the Rear Spoiler Driver (Up) circuit at the Rear Spoiler Motor harness connector.

Q: Is voltage present?

YES: Repair the Rear Spoiler Driver (Up) circuit for a short to voltage. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Go to 4




4. MEASURE THE VOLTAGE OF THE REAR SPOILER DRIVER (DOWN) CIRCUIT

Measure the voltage of the Rear Spoiler Driver (Down) circuit at the Rear Spoiler Motor harness connector.

Q: Is voltage present?

YES: Repair the Rear Spoiler Driver (Down) circuit for a short to voltage. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Go to 5




5. MEASURE THE RESISTANCE OF THE REAR SPOILER DRIVER (UP) CIRCUIT

Turn the ignition off.
Measure the resistance between ground and the Rear Spoiler Driver (Up) circuit at the Rear Spoiler Motor harness connector.

Q: Is the resistance below 10K ohms?

YES: Repair the Rear Spoiler Driver (Up) circuit for a short to ground. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Go to 6




6. MEASURE THE RESISTANCE OF THE REAR SPOILER DRIVER (DOWN) CIRCUIT

Measure the resistance between ground and the Rear Spoiler Driver (Down) circuit at the Rear Spoiler Motor harness connector.

Q: Is the resistance below 10K ohms?

YES: Repair the Rear Spoiler Driver (Down) circuit for a short to ground. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Replace the Rear Spoiler Motor. Perform REAR SPOILER VERIFICATION TEST.