Pinpoint Test H: The Interior Courtesy Lamps Stay On Continuously

Interior Lighting

Pinpoint Tests

Pinpoint Test H: The Interior Courtesy Lamps Stay On Continuously

Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

When the Smart Junction Box (SJB) detects a request for the courtesy lamps (such as open door or from the instrument panel dimmer switch), the SJB supplies voltage to the interior courtesy lamps.

- DTC B2A35 (Interior Lighting Output Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage from the courtesy lamp output circuit.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- SJB



PINPOINT TEST H: THE INTERIOR COURTESY LAMPS STAY ON CONTINUOUSLY

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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H1 CHECK FOR RECORDED SJB DTCs


- Review the recorded results from the SJB self-test.
- Are any DTCs present?

Yes
For DTC B2A35, GO to H2.

For all other DTCs, REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures

No
GO to H2.

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H2 CHECK THE SJB INTERIOR COURTESY LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: SJB C2280a .
- Ignition ON.
- Observe the courtesy lamps.
- Do the interior courtesy lamps continue to illuminate?

Yes
REPAIR circuit VLN33 (GY/VT) for a short to voltage. TEST the system for normal operation.

No
GO to H3.

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H3 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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