Pinpoint Test F: All The Courtesy Lamps Stay On Continuously
Interior Lighting
Pinpoint Tests
Pinpoint Test F: All The Courtesy Lamps Stay On Continuously
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a voltage signal to each door ajar switch, which is routed to ground when the door is closed (the door ajar switch is closed when the door is closed). When the door is opened, the signal to ground is interrupted indicating an open door to the SJB.
The SJB also sends a voltage signal to the instrument panel dimmer switch. When the instrument panel dimmer switch is rotated to the DOME LAMP position, the voltage signal is routed to ground indicating a request for the courtesy lamps.
When the SJB detects an open door or a request from the instrument panel dimmer switch, voltage is provided to the courtesy lamps.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Instrument panel dimmer switch
- Ajar switch
- SJB
PINPOINT TEST F: ALL THE 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.
-------------------------------------------------
F1 CHECK THE SJB DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS
- Use the recorded results from the SJB continuous and on-demand self-tests.
- Is DTC B2A35, B2A37 or B2A39 present?
Yes
For DTC B2A35, GO to Pinpoint Test G. Pinpoint Test G: The Interior Courtesy Lamps Stay On Continuously
For DTC B2A37, GO to Pinpoint Test H. Pinpoint Test H: The Running Board Lamps Stay On Continuously
For DTC B2A39, GO to Pinpoint Test I. Pinpoint Test I: The Cargo Lamp Stays On Continuously
No
GO to F2.
-------------------------------------------------
F2 CHECK THE SJB INSTRUMENT PANEL DIMMER SWITCH DOME LAMP REQUEST PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB instrument panel dimmer switch dome lamp request PID (DOMELM_SW).
- Does the PID indicate the instrument panel dimmer switch is in the DOME LAMP position?
Yes
GO to F3.
No
GO to F5.
-------------------------------------------------
F3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
- Ignition OFF.
- Disconnect: Instrument Panel Dimmer Switch C2065.
- Close all the doors and wait 30 seconds.
- Do the courtesy lamps continue to illuminate?
Yes
GO to F4.
No
INSTALL a new instrument panel dimmer switch. REFER to Instrument Panel, Gauges and Warning Indicators. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------
F4 CHECK THE INTERIOR COURTESY LAMP REQUEST CIRCUIT FOR A SHORT TO GROUND
- Disconnect: SJB C2280b.
- Measure the resistance between the instrument panel dimmer switch C2065-2, circuit CLN28 (GN/BU), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to F9.
No
REPAIR circuit CLN28 (GN/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------
F5 CHECK THE DOOR AJAR PIDs
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB door ajar switch PIDs (D_DR_SW, P_DR_SW, LRDR_SW, and RRDR_SW) while opening and closing all the doors.
- Do all the door ajar switch PID values agree with the door positions?
Yes
GO to F9.
No
GO to F6.
-------------------------------------------------
F6 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH
- Ignition OFF.
- Disconnect: Suspect Ajar Switch.
- Measure the voltage between the suspect ajar switch connector, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
GO to F7.
No
GO to F8.
-------------------------------------------------
F7 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the suspect ajar switch connector, harness side as follows:
- Is the resistance less than 5 ohms?
Yes
INSTALL a new ajar switch in question. REFER to Doors, Hood and Trunk &/or Locks. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR circuit GD179 (BK/VT) for an open. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------
F8 CHECK THE DOOR AJAR SWITCH INPUT CIRCUITS
- Disconnect: SJB C2280c.
- Measure the resistance between the suspect ajar switch connector, harness side and the SJB connector, harness side as follows:
- Is the resistance less than 5 ohms?
Yes
GO to F9.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------
F9 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. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------