Pinpoint Test X: The Reversing Lamps Are On Continuously

Reversing Lamps

Pinpoint Tests

Pinpoint Test X: The Reversing Lamps Are On Continuously

Refer to Wiring Diagram Set 93, Reversing Lamps for schematic and connector information. Diagrams By Number

Normal Operation - Automatic Transaxle

When the transaxle is placed in REVERSE (R), the Transmission Control Module (TCM) sends gear status information (through the Instrument Cluster (IC) gateway) to the Smart Junction Box (SJB). When the SJB receives a message indicating the transaxle is in REVERSE (R), the SJB provides ground to an internal relay, which routes the voltage to circuit CBP12 (GN/WH) to the reversing lamps and the electrochromatic rear view mirror (if equipped).

Manual Transaxle

Voltage is supplied to the reversing lamp switch through circuit CBP18 (GY/OG). When the transaxle is placed in REVERSE (R), the reversing lamp switch routes the voltage to circuit CBP12 (GN/WH) to the reversing lamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Reversing lamp switch
- Rear view mirror
- SJB



PINPOINT TEST X: THE REVERSING LAMPS ARE ON CONTINUOUSLY

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X1 CHECK THE TRANSAXLE TYPE


- Ignition OFF.
- Check the transaxle type on the vehicle.
- Is the vehicle equipped with a manual transaxle?

Yes
GO to X2.

No
GO to X3.

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X2 CHECK THE REVERSING LAMP SWITCH


- Disconnect: Reversing Lamp Switch C169.
- Ignition ON.
- Do the reversing lamps continue to illuminate?

Yes
For vehicles equipped with an auto-dimming mirror, GO to X4.

No
INSTALL a new reversing lamp switch. REFER to Reversing Lamp Switch Service and Repair. TEST the system for normal operation.

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X3 CHECK FOR TCM DTCs


- Ignition ON.
- Carry out the TCM on-demand self-test.
- Are any TCM DTCs present?

Yes
REFER to Transmission Control Systems. Testing and Inspection

No
For vehicles equipped with an auto-dimming mirror, GO to X4.

For vehicles not equipped with an auto-dimming mirror, GO to X5.

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X4 CHECK THE REAR VIEW MIRROR


- Ignition OFF.
- Disconnect: Rear View Mirror C911 or C9030.
- Ignition ON.
- Do the reversing lamps continue to illuminate?

Yes
For vehicles with an automatic transaxle, GO to X5.

For vehicles with an manual transaxle, REPAIR circuit CPB12 (GN/WH) for a short to voltage. TEST the system for normal operation.

No
INSTALL a new rear view mirror. REFER to Mirrors. TEST the system for normal operation.

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X5 CHECK CIRCUIT CBP12 (GN/WH) FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: SJB C2280e.
- Ignition ON.
- Do the reversing lamps continue to illuminate?

Yes
REPAIR the circuit. TEST the system for normal operation.

No
GO to X6.

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X6 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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