Pinpoint Test F: All The Courtesy Lamps Stay On Continuously
Interior Lighting
Pinpoint Test F: All The Courtesy Lamps Stay On Continuously
Refer to Wiring Diagram Set 71, Cluster and Panel Illumination for schematic and connector information Electrical Diagrams.
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information Electrical Diagrams.
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information Electrical Diagrams.
Normal Operation - Door Ajar Input
The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches. The door ajar switch is closed with the door closed. When the door is opened, the signal to ground is interrupted indicating an open door to the SJB (Smart Junction Box).
Liftgate/Liftgate Window Ajar Input
The SJB (Smart Junction Box) sends a voltage signal to the liftgate ajar switch. The voltage signal passes through the liftgate ajar switch to the liftgate window ajar switch. The signal is then routed to ground.
The liftgate and the liftgate window ajar switches are wired in series and are monitored from a single circuit by the SJB (Smart Junction Box). The liftgate and liftgate window ajar switches are closed when the liftgate and liftgate window are closed. When the liftgate or liftgate window is opened, the signal to ground is interrupted indicating an open liftgate or liftgate window (the SJB (Smart Junction Box) cannot determine which is open).
Instrument Panel Dimmer Switch Input
The SJB (Smart Junction Box) monitors the instrument panel dimmer switch status to determine if the courtesy lamps are requested. When the instrument panel dimmer switch is rotated to the DOME LAMP position, ground is supplied.
The SJB (Smart Junction Box) supplies voltage to the interior courtesy lamp(s) when any of the following conditions exist:
- Any door, liftgate or liftgate window is opened.
- The instrument panel dimmer switch is place in the DOME LAMP position.
- A correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Instrument panel dimmer switch
- Liftgate ajar switch (integrated into the liftgate latch)
- Liftgate window ajar switch (integrated into the liftgate window latch)
- Door ajar switch (integrated into the door latch)
- SJB (Smart Junction Box)
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 FOR SJB (Smart Junction Box) OUTPUT DTCs
- Ignition OFF.
- Use the recorded results from the SJB (Smart Junction Box) self-test.
Is DTC B2A35 present?
Yes
GO to F2.
No
GO to F3.
F2 CHECK THE SJB (Smart Junction Box) INTERIOR COURTESY LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: SJB (Smart Junction Box) C2280A.
- Ignition ON.
- Observe the interior courtesy lamps.
Do the interior courtesy lamps continue to illuminate?
Yes
REPAIR circuit VLN33 (GY/VT) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
No
GO to F16.
F3 CHECK THE SJB (Smart Junction Box) INSTRUMENT PANEL DIMMER SWITCH DOME LAMP REQUEST PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- Monitor the SJB (Smart Junction Box) 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 F4.
No
GO to F6.
F4 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 F5.
No
INSTALL a new instrument panel dimmer switch. CLEAR the DTCs. REPEAT the self-test.
F5 CHECK THE DOME LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
- Disconnect: SJB (Smart Junction Box) C2280B.
- Measure the resistance between the instrument panel dimmer switch C2065-5, circuit CLN17 (BN), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to F16.
No
REPAIR circuit CLN17 (BN) for a short to ground. CLEAR the DTCs. REPEAT the self-test.
F6 CHECK THE SJB (Smart Junction Box) DOOR AJAR PIDs
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- Monitor 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 F10.
No
GO to F7.
F7 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH
- Ignition OFF.
- Disconnect: Suspect Door Ajar Switch.
- Measure the voltage between the suspect door ajar switch, harness side and ground as follows:
Suspect Door Ajar Switch Connector-Pin Circuit LH front C525-5 CPL26 (GN/VT) RH front C609-5 CPL31 (WH) LH rear C704-5 CPL39 (YE) RH rear C804-5 CPL39 (YE)
Is the voltage greater than 10 volts?
Yes
GO to F8.
No
GO to F9.
F8 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the suspect door ajar switch connector, harness side as follows:
Suspect Door Ajar Switch Connector-Pin Circuit LH front C525-5 CPL26 (GN/VT) C525-6 GD182 (BK/GY) RH front C609-5 CPL31 (WH) C609-6 GD182 (BK/GY) LH rear C704-5 CPL39 (YE) C704-6 GD182 (BK/GY) RH rear C804-5 CPL39 (YE) C804-6 GD182 (BK/GY)
Is the voltage greater than 10 volts?
Yes
INSTALL a new door latch in question. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the ground circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.
F9 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the suspect door ajar switch, harness side and the SJB (Smart Junction Box), harness side as follows:
Suspect Door Ajar Switch Connector-Pin/ Circuit SJB (Smart Junction Box) Connector-Pin/ Circuit LH front C525-5 CPL26 (GN/VT) C2280C-14 CPL26 (GN/VT) RH front C609-5 CPL31 (WH) C2280C-2 CPL31 (WH) LH rear C704-5 CPL39 (YE) C2280C-3 CPL36 (GN) RH rear C804-5 CPL39 (YE) C2280C-15 CPL39 (YE)
Is the resistance less than 5 ohms?
Yes
GO to F16.
No
REPAIR the circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.
F10 CHECK THE SJB (Smart Junction Box) LIFTGATE/LIFTGATE WINDOW AJAR PID
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.
- Monitor the SJB (Smart Junction Box) liftgate/liftgate window ajar switch PID (DECKLID) while opening and closing the liftgate and then the liftgate window.
Does the liftgate/liftgate window ajar switch PID value agree with the liftgate and liftgate window positions?
Yes
GO to F16.
No
GO to F11.
F11 CHECK FOR VOLTAGE TO THE LIFTGATE WINDOW AJAR SWITCH
- Ignition OFF.
- Disconnect: Liftgate Window Ajar Switch C479.
- NOTE: Make sure the liftgate is closed for correct test results.
Measure the voltage between the liftgate window ajar switch C479-3, circuit CPL44 (YE/OG), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to F12.
No
GO to F13.
F12 CHECK FOR VOLTAGE TO THE LIFTGATE WINDOW AJAR SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the liftgate window ajar switch C479-3, circuit CPL44 (YE/OG), harness side and the liftgate window ajar switch C479-2, circuit GD182 (BK/GY), harness side.
Is the voltage greater than 10 volts?
Yes
INSTALL a new liftgate window latch. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR circuit GD182 (BK/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
F13 CHECK FOR VOLTAGE TO THE LIFTGATE AJAR SWITCH
- Disconnect: Liftgate Ajar Switch C478.
- Measure the voltage between the liftgate ajar switch C478-2, circuit CPL58 (GY/OG), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to F14.
No
GO to F15.
F14 CHECK FOR VOLTAGE TO THE LIFTGATE WINDOW AJAR SWITCH USING THE CONNECTOR GROUND
NOTE: Make sure the liftgate window switch is connected and the liftgate window is closed for correct test results.
- Connect: Liftgate Window Ajar Switch C479.
- Measure the voltage between the liftgate ajar switch C478-2, circuit CPL58 (GY/OG), harness side and the liftgate ajar switch C478-1, circuit CPL44 (YE/OG), harness side.
Is the voltage greater than 10 volts?
Yes
INSTALL a new liftgate ajar switch. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR circuit CPL44 (YE/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
F15 CHECK THE LIFTGATE/LIFTGATE WINDOW AJAR INPUT CIRCUIT FOR AN OPEN
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the SJB (Smart Junction Box) C2280C-16, circuit CPL58 (GY/OG), harness side and the liftgate ajar switch C478-2, circuit CPL58 (GY/OG), harness side.
Is the resistance less than 5 ohms?
Yes
GO to F16.
No
REPAIR circuit CPL58 (GY/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
F16 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.