Rear Spoiler Limit Switch Failure

Rear Spoiler Limit Switch Failure:

WHEN MONITORED
Continuous.

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

POSSIBLE CAUSES
- Spoiler limit switch signal (up) circuit shorted to voltage
- Spoiler limit switch signal (down) circuit shorted to voltage
- Spoiler limit switch signal (up) circuit shorted to ground
- Spoiler limit switch signal (down) circuit shorted to ground
- Spoiler limit switch signal (up) circuit open
- Spoiler limit switch signal (down) circuit open rear
- Spoiler limit switch ground circuit open rear
- Spoiler limit switch

Diagnostic Test




1. MEASURE THE RESISTANCE OF THE SPOILER LIMIT SWITCH SIGNAL (UP) CIRCUIT

Turn the ignition off.
Disconnect the BCM harness connector.
Disconnect the Rear Spoiler Limit Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary. Measure the resistance of the Spoiler Limit Switch Signal (Up) circuit from the BCM harness connector to the Rear Spoiler Limit Switch harness connector.

Q: Is the resistance below 5.0 ohms?

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




2. MEASURE THE RESISTANCE OF THE SPOILER LIMIT SWITCH SIGNAL (DOWN) CIRCUIT

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

Q: Is the resistance below 5.0 ohms?

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




3. MEASURE THE VOLTAGE OF THE SPOILER LIMIT SWITCH SIGNAL (UP) CIRCUIT

Turn the ignition on.
Measure the voltage of the Spoiler Limit Switch Signal (Up) circuit at the Rear Spoiler Limit Switch harness connector.

Q: Is voltage present?

YES: Repair the Spoiler Limit Switch Signal (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 SPOILER LIMIT SWITCH SIGNAL (DOWN) CIRCUIT

Measure the voltage of the Spoiler Limit Switch Signal (Down) circuit at the Rear Spoiler Limit Switch harness connector.

Q: Is voltage present?

YES: Repair the Spoiler Limit Switch Signal (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 SPOILER LIMIT SWITCH SIGNAL (UP) CIRCUIT

Turn the ignition off.
Measure the resistance between ground and the Spoiler Limit Switch Signal (Up) circuit at the Rear Spoiler Limit Switch harness connector.

Q: Is the resistance below 10K ohms?

YES: Repair the Spoiler Limit Switch Signal (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 SPOILER LIMIT SWITCH SIGNAL (DOWN) CIRCUIT

Measure the resistance between ground and the Spoiler Limit Switch Signal (Down) circuit at the Rear Spoiler Limit Switch harness connector.

Q: Is the resistance below 10K ohms?

YES: Repair the Spoiler Limit Switch Signal (Down) circuit for a short to ground. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Go to 7




7. MEASURE THE RESISTANCE OF THE REAR SPOILER LIMIT SWITCH GROUND CIRCUIT

Measure the resistance between ground and the Rear Spoiler Limit Switch Ground circuit.

Q: Is the resistance below 5.0 ohms?

YES: Replace the Rear Spoiler Limit Switch. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
NO: Repair the Rear Spoiler Limit Switch Ground circuit for an open. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test