Rear Spoiler Motor Failure

REAR SPOILER MOTOR FAILURE

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 B(+)
- Rear spoiler driver (down) circuit shorted to B(+)
- 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. OPEN REAR SPOILER DRIVER (UP) CIRCUIT




Turn the ignition off.
Disconnect the BCM C4 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 C4 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. OPEN REAR SPOILER DRIVER (DOWN) CIRCUIT




With the ignition off.
Measure the resistance of the Rear Spoiler Driver (Down) circuit from the BCM C4 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. REAR SPOILER DRIVER (UP) CIRCUIT SHORT TO B(+)




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

Q: Is the voltage above 1.0 volt?

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

4. REAR SPOILER DRIVER (DOWN) CIRCUIT SHORT TO B(+)




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

Q: Is the voltage above 1.0 volt?

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

5. REAR SPOILER DRIVER (UP) CIRCUIT SHORT TO GROUND




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 100k 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. REAR SPOILER DRIVER (DOWN) CIRCUIT SHORT TO GROUND




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

Q: Is the resistance below 100k 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. Rear Spoiler Verification Test