Pinpoint Test G: All The Courtesy Lamps Stay On Continuously
Interior Lighting
Pinpoint Test G: All the Courtesy Lamps Stay On Continuously
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
The Smart Junction Box (SJB) sends a voltage signal to each door ajar switch, the Liftgate/Trunk Module (LTM) (vehicles with a power liftgate), the liftgate glass ajar switch and the liftgate ajar switch (vehicles with a manual liftgate). The voltage signal is routed to ground when the door, liftgate glass or liftgate are closed. When a door, liftgate or liftgate glass is opened, the signal to ground is interrupted, indicating an open door or liftgate.
The SJB (Smart Junction Box) also sends a voltage signal to the instrument panel dimmer switch to monitor for a dome lamp request. When the signal is routed to ground, the SJB (Smart Junction Box) interprets this as a request for the courtesy lamps.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Instrument panel dimmer switch
- Door ajar switch
- Liftgate ajar switch (integrated into the liftgate latch)
- Liftgate glass ajar switch (integrated into the liftgate latch)
- LTM (Liftgate/Trunk Module)
- SJB (Smart Junction Box)
PINPOINT TEST G : 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.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
G1 CHECK THE SJB (Smart Junction Box) DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS
- Use the recorded results from the SJB (Smart Junction Box) continuous and the on-demand self-test.
Are any SJB (Smart Junction Box) DTCs recorded?
Yes
For DTC B2A39, GO to Pinpoint Test H. Pinpoint Test H: The Puddle Lamps Stay On Continuously
For DTC B1320, B1328, B1336 or B1572, GO to G2.
For DTC B1688, GO to G5.
For DTC B2A35, GO to G7.
For DTC B2077 (manual liftgate), GO to G8.
For DTC B2077 (power liftgate), GO to G13.
No
If equipped with a power liftgate, GO to G13.
If equipped with a manual liftgate, GO to G19.
G2 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH
- Ignition OFF.
- Disconnect: Suspect Ajar Switch.
- Measure the voltage between the suspect door ajar switch, harness side and ground as follows:
Location Connector-Pin Circuit LH front C526-2 CPL26 (GN/VT) RH front C602-2 CPL31 (WH) LH rear C715-2 CPL36 (GN) RH rear C820-2 CPL36 (GN)
Is the voltage greater than 10 volts?
Yes
GO to G3.
No
GO to G4.
G3 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:
Location Connector-Pin/ Circuit Connector-Pin/ Circuit LH front C526-2 CPL26 (GN/VT) C526-1 GD143 (BK/VT) RH front C602-2 CPL31 (WH) C602-1 GD138 (BK/WH) LH rear C715-2 CPL36 (GN) C715-1 GD138 (BK/WH) RH rear C820-2 CPL36 (GN) C820-1 GD138 (BK/WH)
Is the voltage greater than 10 volts?
Yes
INSTALL a new door ajar switch for the switch 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.
G4 CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the suspect ajar switch connector, harness side and the SJB (Smart Junction Box) connector, harness side as follows:
Location Suspect Ajar Switch Connector-Pin/ Circuit SJB (Smart Junction Box) Connector-Pin/ Circuit LH front C526-2 CPL26 (GN/VT) C2280C-14 CPL26 (GN/VT) RH front C602-2 CPL31 (WH) C2280C-2 CPL31 (WH) LH rear C715-2 CPL36 (GN) C2280C-3 CPL39 (YE) RH rear C820-2 CPL36 (GN) C2280C-15 CPL36 (GN)
Is the resistance less than 5 ohms?
Yes
GO to G19.
No
REPAIR the circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.
G5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
NOTE: Make sure the doors are closed.
- Ignition OFF.
- Disconnect: Instrument Panel Dimmer Switch C2065.
- Wait 30 seconds and observe the courtesy lamps.
Are the courtesy lamps still illuminated?
Yes
GO to G6.
No
INSTALL a new instrument panel dimmer switch. CLEAR the DTCs. REPEAT the self-test.
G6 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 CLN28 (GN/BU), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to G19.
No
REPAIR circuit CLN28 (GN/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test.
G7 CHECK THE SJB (Smart Junction Box) INTERIOR COURTESY LAMP CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280A.
- Ignition ON.
- Observe the courtesy lamps.
Are the courtesy lamps still illuminated?
Yes
REPAIR circuit VLN33 (GY/VT) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
No
GO to G19.
G8 CHECK THE LIFTGATE AJAR SWITCH (MANUAL LIFTGATE)
- Ignition OFF.
- Disconnect: Liftgate Ajar Switch C457.
- Connect a fused jumper wire between the liftgate ajar switch C457-4, circuit CPL58 (GY/OG), harness side and the liftgate ajar switch C457-3, circuit CPR50 (BN/BU), harness side.
- Wait 30 seconds and observe the courtesy lamps.
Do the courtesy lamps turn off?
Yes
REMOVE the jumper wire. INSTALL a new liftgate latch. CLEAR the DTCs. REPEAT the self-test.
No
REMOVE the jumper wire. GO to G9.
G9 CHECK THE LIFTGATE GLASS AJAR SWITCH (MANUAL LIFTGATE)
- Connect: Liftgate Ajar Switch C457.
- Disconnect: Liftgate Glass Ajar Switch C4040.
- NOTE: Make sure the liftgate is closed.
Connect a fused jumper wire between the liftgate glass ajar switch C4040-1, circuit CPR50 (BN/BU), harness side and the liftgate glass ajar switch C4040-3, circuit GD150 (BK/WH), harness side.
- Wait 30 seconds and observe the courtesy lamps.
Do the courtesy lamps turn off?
Yes
REMOVE the jumper wire. INSTALL a new liftgate glass ajar switch. CLEAR the DTCs. REPEAT the self-test.
No
REMOVE the jumper wire. GO to G10.
G10 CHECK THE LIFTGATE GLASS AJAR SWITCH GROUND CIRCUIT FOR AN OPEN (MANUAL LIFTGATE)
- Disconnect: Negative Battery Cable.
- Measure the resistance between the liftgate glass ajar switch C4040-3, circuit GD150 (BK/WH), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to G11.
No
REPAIR circuit GD150 (BK/WH) for an open. CLEAR the DTCs. REPEAT the self-test.
G11 CHECK THE LIFTGATE AJAR SWITCH GROUND CIRCUIT FOR AN OPEN (MANUAL LIFTGATE)
- Connect: Liftgate Glass Ajar Switch C4040.
- Disconnect: Liftgate Ajar Switch C457.
- NOTE: Make sure the liftgate glass is closed.
Measure the resistance between the liftgate ajar switch C457-3, circuit CPR50 (BN/BU), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to G12.
No
REPAIR circuit CPR50 (BN/BU) for an open. CLEAR the DTCs. REPEAT the self-test.
G12 CHECK THE LIFTGATE AJAR SWITCH INPUT CIRCUIT FOR AN OPEN (MANUAL LIFTGATE)
- Connect: Liftgate Ajar Switch C457.
- Disconnect: SJB (Smart Junction Box) C2280C.
- NOTE: Make sure the liftgate is closed.
Measure the resistance between the SJB (Smart Junction Box) C2280C-16, circuit CPL58 (GY/OG), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to G19.
No
REPAIR circuit CPL58 (GY/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
G13 CHECK THE LTM (Liftgate/Trunk Module) DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS
- Use the recorded results from the LTM (Liftgate/Trunk Module) continuous and on-demand self-tests.
Are any LTM (Liftgate/Trunk Module) DTCs recorded?
Yes
For DTC B2718 or DTC B2721, GO to G14.
For DTC B2723, GO to G16.
No
GO to G14.
G14 CHECK THE LTM (Liftgate/Trunk Module)
- Disconnect: LTM (Liftgate/Trunk Module) C4174B.
- NOTE: If the fuse fails, repair the circuit for a short to voltage.
Connect a fused jumper wire between the LTM (Liftgate/Trunk Module) C4174B-2, circuit CPL58 (GY/OG), harness side and ground.
- Wait 30 seconds and observe the courtesy lamps.
Do the courtesy lamps turn off?
Yes
REMOVE the jumper wire. GO to G20.
No
LEAVE the jumper wire connected. GO to G15.
G15 CHECK THE LIFTGATE AJAR SWITCH INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the SJB (Smart Junction Box) C2280C-16, circuit CPL58 (GY/OG), harness side and ground.
Is the resistance less than 5 ohms?
Yes
REMOVE the jumper wire. GO to G19.
No
REMOVE the jumper wire. REPAIR circuit CPL58 (GY/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
G16 CHECK THE LIFTGATE GLASS AJAR SWITCH
- Ignition OFF.
- Disconnect: Liftgate Glass Ajar Switch C4040.
- Connect a fused jumper wire between the liftgate glass ajar switch C4040-1, circuit CPR50 (BN/BU), harness side and the liftgate glass ajar switch C4040-3, circuit GD150 (BK/WH), harness side.
- Wait 30 seconds and observe the courtesy lamps.
Do the courtesy lamps turn off?
Yes
REMOVE the jumper wire. INSTALL a new liftgate glass ajar switch. CLEAR the DTCs. REPEAT the self-test.
No
REMOVE the jumper wire. GO to G17.
G17 CHECK THE LIFTGATE GLASS AJAR SWITCH GROUND CIRCUIT FOR CONTINUITY (POWER LIFTGATE)
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: Liftgate Glass Ajar Switch C4040.
- Measure the resistance between the liftgate glass ajar switch C4040-3, circuit GD150 (BK/WH), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to G18.
No
REPAIR circuit GC150 (BK/WH) for an open. CLEAR the DTCs. REPEAT the self-test.
G18 CHECK THE LIFTGATE GLASS AJAR SWITCH SIGNAL CIRCUIT FOR AN OPEN
- Connect: Liftgate Glass Ajar Switch C4040.
- Disconnect: LTM (Liftgate/Trunk Module) C4174B.
- NOTE: Make sure the liftgate glass is closed.
Measure the resistance between the LTM (Liftgate/Trunk Module) C4174B-18, circuit CPR50 (BN/BU), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to G20.
No
REPAIR circuit CPR50 (BN/BU) for an open. CLEAR the DTCs. REPEAT the self-test.
G19 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.
G20 CHECK FOR CORRECT LTM (Liftgate/Trunk Module) OPERATION
- Disconnect all the LTM (Liftgate/Trunk Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LTM (Liftgate/Trunk Module) 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 LTM (Liftgate/Trunk Module). 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.