Pinpoint Test F: The Liftgate Window Latch Release Is Inoperative/Does Not Operate Correctly

Handles, Locks, Latches and Entry Systems

Pinpoint Test F: The Liftgate Window Latch Release Is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information Electrical Diagrams.

Normal Operation

When the Smart Junction Box (SJB) receives an open request from the liftgate window release switch, a Remote Keyless Entry (RKE) transmitter or the keyless entry keypad (if equipped), the SJB (Smart Junction Box) supplies voltage to the liftgate window latch. The liftgate window latch has a dedicated ground circuit.

The SJB (Smart Junction Box) sends a voltage signal to the liftgate window release switch through the input circuit. When the liftgate window release switch is pressed, the voltage signal is routed to ground, signaling the SJB (Smart Junction Box) to release the liftgate window. The liftgate window release switch has a dedicated ground circuit.

- DTC B2667 (Liftglass Release Switch Circuit Failure)- a continuous and on-demand DTC that sets when the SJB (Smart Junction Box) detects a short to ground on the liftgate window release switch input circuit. This DTC may also set if the liftgate window release switch is pressed for longer than 2 minutes.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Liftgate window release switch

- Liftgate window release latch

- SJB (Smart Junction Box)

PINPOINT TEST F : THE LIFTGATE WINDOW LATCH RELEASE IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

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.

F1 CHECK THE DOOR LOCK OPERATION

- Lock and unlock the doors using the door lock control switch.

Do the door locks operate correctly?

Yes
GO to F2.

No
GO to Pinpoint Test A Pinpoint Test A: All Door Locks Are Inoperative.

F2 CHECK THE RECORDED SJB (Smart Junction Box) DTCs FROM THE SELF-TEST

- Check the recorded results from the SJB (Smart Junction Box) self-test.

Is DTC B2667 present?

Yes
GO to F3.

No
GO to F5.

F3 CHECK THE LIFTGATE WINDOW RELEASE SWITCH FOR A SHORT TO GROUND

- Disconnect: Liftgate Window Release Switch C4039.

- Clear the DTCs and carry out the SJB (Smart Junction Box) self-test.

Is DTC B2667 still present?

Yes
GO to F4.

No
INSTALL a new liftgate window release switch. REFER to Liftgate Release Switch - Liftgate Window . TEST the system for normal operation.

F4 CHECK THE LIFTGATE WINDOW RELEASE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) C2280C.

- Measure the resistance between the liftgate window release switch C4039-1, circuit CPL60 (WH), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to F14.

No
REPAIR circuit CPL60 (WH) for a short to ground. CLEAR the DTCs. REPEAT the self-test.

F5 MONITOR THE LIFTGATE WINDOW RELEASE SWITCH PID

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.

- Monitor the SJB (Smart Junction Box) liftgate window release switch PID (LIFTGLASS_SW) while pressing the liftgate window release switch.

Does the PID indicate the liftgate window release switch is active?

Yes
GO to F9.

No
GO to F6.

F6 CHECK THE LIFTGATE WINDOW RELEASE SWITCH

- Disconnect: Liftgate Window Release Switch C4039.

- Unlock the doors with the door lock control switch.

- Connect a fused jumper wire between the liftgate window release switch C4039-2, circuit CPL60 (WH), harness side and the liftgate window release switch C4039-1, circuit CPL60 (WH), harness side.





Does the liftgate window latch release?

Yes
INSTALL a new liftgate window release switch. REFER to Liftgate Release Switch - Liftgate Window . TEST the system for normal operation.

No
GO to F7.

F7 CHECK THE LIFTGATE WINDOW RELEASE SWITCH GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: Negative Battery Cable.

- Measure the resistance between the liftgate window release switch C4039-2, circuit CPL60 (WH), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to F8.

No
REPAIR circuit CPL60 (WH) for an open. TEST the system for normal operation.

F8 CHECK THE LIFTGATE WINDOW RELEASE SWITCH INPUT CIRCUIT FOR AN OPEN

- Disconnect: SJB (Smart Junction Box) C2280C.

- Connect a fused jumper wire between the liftgate window release switch C4039-2, circuit CPL60 (WH), harness side and the liftgate window release switch C4039-1, circuit CPL60 (WH), harness side.





- Measure the resistance between the SJB (Smart Junction Box) C2280C-20, circuit CPL60 (BN/YE), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to F14.

No
REPAIR circuit CPL60 (BN/YE) for an open. TEST the system for normal operation.

F9 CHECK FOR A SHORT TO VOLTAGE TO THE LIFTGATE WINDOW LATCH

- Disconnect: Liftgate Window Latch C479.

- Measure the voltage between the liftgate window latch C479-1, circuit CPL59 (BN/BU), harness side and ground.





Is any voltage present?

Yes
GO to F10.

No
GO to F11.

F10 CHECK THE LIFTGATE WINDOW RELEASE OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) C2280D.

- Ignition ON.

- Measure the voltage between the liftgate window latch C479-1, circuit CPL59 (BN/BU), harness side and ground.





Is any voltage present?

Yes
REPAIR circuit CPL59 (BN/BU) for a short to voltage. TEST the system for normal operation.

No
GO to F14.

F11 CHECK FOR VOLTAGE TO THE LIFTGATE WINDOW LATCH

- Ignition OFF.

- Unlock the doors with the door lock control switch.

- NOTE: The SJB (Smart Junction Box) only supplies voltage to the liftgate window latch momentarily. It is important to monitor the meter while pressing the liftgate window release switch.
While pressing the liftgate window release switch, measure the voltage between the liftgate window latch C479-1, circuit CPL59 (BN/BU), harness side and ground.






Is the voltage momentarily greater than 10 volts?

Yes
GO to F13.

No
GO to F12.

F12 CHECK THE LIFTGATE WINDOW RELEASE OUTPUT CIRCUIT FOR AN OPEN

- Disconnect: SJB (Smart Junction Box) C2280D.

- Measure the resistance between the SJB (Smart Junction Box) C2280D-31, circuit CPL59 (BN/BU), harness side and the liftgate window latch C479-1, circuit CPL59 (BN/BU), harness side.





Is the resistance less than 5 ohms?

Yes
GO to F14.

No
REPAIR circuit CPL59 (BN/BU) for an open. TEST the system for normal operation.

F13 CHECK THE LIFTGATE WINDOW LATCH GROUND CIRCUIT FOR AN OPEN

- Disconnect: Negative Battery Cable.

- Measure the resistance between the liftgate window latch C479-2, circuit GD182 (BK/GY), harness side and ground.





Is the resistance less than 5 ohms?

Yes
INSTALL a new liftgate window latch. REFER to Liftgate Window Latch . TEST the system for normal operation.

No
REPAIR circuit GD182 (BK/GY) for an open. TEST the system for normal operation.

F14 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.