The REAR ACCESS OPEN message displays and Gate Ajar indicator comes on if the liftgate or liftglass is open while the ignition is in RUN. The IPC receives a serial data message from the liftgate module (LGM) requesting illumination. The LGM receives discrete inputs from 2 ajar switches to indicate the status of the liftgate. The liftgate and liftglass ajar switches are normally open when the liftgate and liftglass are closed. When the liftgate or liftglass is opened, the ajar switch contacts close providing a path to ground.

Schematic Reference

Release Systems Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Door Ajar Indicator Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool Liftglass Ajar Switch parameter while opening and closing the liftglass. The parameter should change between Closed and Ajar.

⇒	If the value does not change, refer to Liftglass Ajar Malfunction.

2. Observe the scan tool Liftgate Ajar Switch parameter while opening and closing the liftgate. The parameter should change between Closed and Ajar.

⇒	If the value does not change, refer to Liftgate Ajar Malfunction.

3. Observe the driver information center while opening and closing the liftglass and liftgate, the REAR ACCESS OPEN message should display when the liftgate or liftglass is OPEN and the message should turn OFF when the liftglass and liftgate is closed.

⇒	If the message is always ON or always OFF, replace the IPC.

Liftglass Ajar Malfunction

1. Ignition OFF, disconnect the harness connector at the liftgate window latch assembly.
2. Test for less than 5 ohms between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal replace the LGM.

3. Ignition ON, verify the scan tool Liftglass Ajar Switch parameter is Closed.

⇒	If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the LGM.

4. Install a 3A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Liftglass Ajar Switch parameter is Ajar.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the LGM.

5. If all circuits test normal, test or replace the liftgate window latch assembly.

Liftgate Ajar Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the liftgate latch assembly.
2. Test for less than 5 ohms between the low reference circuit terminal D and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal replace the LGM.

3. Ignition ON, verify the scan tool Liftgate Ajar Switch parameter is Closed.

⇒	If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the LGM.

4. Install a 3A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal D. Verify the scan tool Liftgate Ajar Switch parameter is Ajar.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the LGM.

5. If all circuits test normal, test or replace the liftgate latch assembly.

Liftgate Latch Assembly

1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
2. Test for infinite resistance between the signal terminal B and the low reference terminal D with the switch in the open position.

⇒	If not the specified value, replace the liftgate latch assembly.

3. Test for less than 2 ohms between the signal terminal B and the low reference terminal D with the switch in the closed position.

⇒	If greater than the specified range, replace the liftgate latch assembly.

Liftgate Ajar Switch

1. Ignition OFF, disconnect the harness connector at the liftgate window latch assembly.
2. Test for infinite resistance between the signal terminal A and the low reference terminal B with the switch in the open position.

⇒	If not the specified value, replace the liftgate window latch assembly.

3. Test for less than 2 ohms between the signal terminal A and the low reference terminal B with the switch in the closed position.

⇒	If greater than the specified range, replace the liftgate window latch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.