Pinpoint Test A: The Courtesy Lamps Do Not Illuminate With A Door Open
Interior Lighting
Pinpoint Test A: The Courtesy Lamps Do Not Illuminate With A Door Open
Refer to Wiring Diagrams Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Electrical Diagrams
Refer to Wiring Diagrams Set 89, Interior Lamps for schematic and connector information. Electrical Diagrams
Normal Operation
When any door is opened, the door ajar switch opens the circuit to the Smart Junction Box (SJB). The SJB (Smart Junction Box) monitors the door ajar circuits, and based on the status, the SJB (Smart Junction Box) supplies voltage to the courtesy lamps.
The SJB (Smart Junction Box) also sends a voltage reference signal to the instrument panel dimmer switch to monitor the dome defeat input request. When the instrument panel dimmer switch is in the DOME DEFEAT position, the signal is routed to ground, indicating a request for the dome defeat feature.
When any door is opened, a correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the SJB (Smart Junction Box) provides voltage to the courtesy lamps unless the dome defeat from the instrument panel dimmer switch is detected.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch (part of the door latch)
- Instrument panel dimmer switch
- SJB (Smart Junction Box)
PINPOINT TEST A : THE COURTESY LAMPS DO NOT ILLUMINATE WITH A DOOR OPEN
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Make sure the dimmer switch is not in the DEFEAT position before continuing diagnostics.
A1 CHECK THE OPERATION OF ALL THE INTERIOR COURTESY LAMPS
- Ignition OFF.
- Rotate the instrument panel dimmer switch to the DOME LAMP position and observe the interior courtesy lamps.
Do the interior courtesy lamps illuminate?
Yes
GO to A2.
No
GO to Pinpoint Test D. Pinpoint Test D: All The Interior Courtesy Lamps Are Inoperative
A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- NOTE: The DOME_DEF PID should indicate All if the switch is in the DOME DEFEAT position and Undefined if it is not.
Monitor the SJB (Smart Junction Box) instrument panel dimmer switch PID (DOME_DEF).
Does the PID indicate Undefined?
Yes
GO to A5
No
GO to A3.
A3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
- Disconnect: SJB (Smart Junction Box) Instrument Panel Dimmer Switch C2298.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- Monitor the SJB (Smart Junction Box) instrument panel dimmer switch PID (DOME_DEF).
Does the PID indicate Undefined?
Yes
INSTALL a new instrument panel dimmer switch. TEST the system for normal operation.
No
GO to A4.
A4 CHECK THE DOME DEFEAT INPUT CIRCUIT FOR A SHORT TO GROUND
- Disconnect: Instrument Panel Dimmer Switch C2065.
- Measure the resistance between the instrument panel dimmer switch C2065-2, circuit CLN27 (WH/BN), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to A8.
No
REPAIR circuit CLN27 (WH/BN) for a short to ground. CLEAR the DTCs. REPEAT the self-test.
A5 CHECK THE DOOR AJAR PIDs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- Check the SJB (Smart Junction Box) 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 A8.
No
GO to A6.
A6 CHECK THE DOOR AJAR SWITCH OPERATION
- Disconnect: Suspect Door Latch.
Do the courtesy lamps illuminate?
Yes
INSTALL a new door latch in question. TEST the system for normal operation.
No
GO to A7.
A7 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the suspect door latch, harness side and ground as follows:
Location Connector-Pin Circuit LH front C525-5 CPL26 (GN/VT) RH front C609-5 CPL31 (WH) LH rear C704-5 CPL36 (GN) RH rear C804-5 CPL39 (YE)
Is the resistance greater than 10,000 ohms?
Yes
GO to A8.
No
REPAIR the circuit in question for a short to ground. TEST the system for normal operation.
A8 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect all the SJB (Smart Junction Box) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB (Smart Junction Box) 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 (Smart Junction Box). 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.