Rear Spoiler Limit Switch Signal (Down) Circuit
Spoiler Limit Switch Signal (down) Circuit:
WHEN MONITORED
Continuous.
SET CONDITION
The Body Control Module (BCM) reports a short to power, ground, or an open circuit failure on the Spoiler Limit Switch Signal (Down) circuit.
POSSIBLE CAUSES
- Spoiler limit switch signal (down) circuit shorted to voltage
- Spoiler limit switch signal (down) circuit shorted to ground
- Spoiler limit switch signal (down) circuit open
- Body control module
Diagnostic Test
1. MEASURE THE RESISTANCE OF THE SPOILER LIMIT SWITCH SIGNAL (DOWN) 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 (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 2
NO: Repair the Spoiler Limit Switch Signal (Down) circuit for an open. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test
2. MEASURE THE VOLTAGE OF THE SPOILER LIMIT SWITCH SIGNAL (DOWN) CIRCUIT
Turn the ignition on.
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 3
3. MEASURE THE RESISTANCE OF THE SPOILER LIMIT SWITCH SIGNAL (DOWN) CIRCUIT
Turn the ignition off.
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: Replace the Body Control Module. Perform REAR SPOILER VERIFICATION TEST. Rear Spoiler Verification Test