Pinpoint Test D: The Courtesy Lamps Do Not Turn On With One Door Open

Interior Lighting

Pinpoint Tests

Pinpoint Test D: The Courtesy Lamps Do Not Turn On With One Door Open

Refer to Wiring Diagram Set 110, Power Door Locks for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 113, Luggage Compartment Lid Release for schematic and connector information. Diagrams By Number

Normal Operation

When any door is open, including the luggage compartment lid, the ajar switch opens the circuit to the Smart Junction Box (SJB). The SJB monitors the ajar circuits, and based on the ajar status, the SJB supplies voltage to the courtesy lamps on circuit CLN26 (BU).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Door ajar switch
- Luggage compartment lid ajar switch
- SJB



PINPOINT TEST D: THE COURTESY LAMPS DO NOT TURN ON WITH ONE DOOR OPEN

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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D1 CHECK THE COURTESY LAMP OPERATION USING THE INSTRUMENT PANEL DIMMER SWITCH


- Operate the courtesy lamps using the instrument panel dimmer switch.
- Do the courtesy lamps illuminate using the instrument panel dimmer switch?

Yes
GO to D2.

No
Go To Pinpoint Test A. Pinpoint Test A: The Courtesy Lamps Are Inoperative

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D2 CHECK THE DOOR AJAR SWITCH OPERATION


- Ignition OFF.
- Disconnect: Suspect Ajar Switch.
- Observe the interior lamps.
- Do the interior lamps illuminate with the suspect ajar switch disconnected?

Yes
INSTALL a new door latch or luggage compartment lid latch for the suspect ajar switch. REFER to Locks. TEST the system for normal operation.

No
GO to D3.

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D3 CHECK THE AJAR SWITCH CIRCUIT FOR A SHORT TO GROUND


- Disconnect: SJB C2280c.
- Measure the resistance between the suspect ajar switch, harness side and ground as follows:





- Is the resistance greater than 10,000 ohms?

Yes
GO to D4.

No
REPAIR the circuit. TEST the system for normal operation.

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D4 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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