Diagnostic Routine E

Diagnostic Routine E

Diagnostic Overview

The Power Liftgate Pinch Strip Does Not Stop Or Reverse the Liftgate

Normal Operations and Fault Conditions

When the power liftgate moves in the close direction, the LTM (Liftgate/Trunk Module) monitors the pinch strip switches and position sensor for obstacle detection. If the LTM (Liftgate/Trunk Module) detects an obstacle or a concern with a pinch strip, it either reverses the liftgate or does not allow power close. The LTM (Liftgate/Trunk Module) sends a voltage reference signal to both pinch strips. When a pinch strip is activated, it switches the voltage reference signal to ground. The right and left pinch strip return signal circuits are spliced together.

Visual Inspection and Diagnostic Pre-checks

- Inspect pinch strip switches.

Pinpoint Test

1. RETRIEVE THE DTCs (Diagnostic Trouble Codes) FROM THE LTM (Liftgate/Trunk Module)

1. Using a scan tool, perform the LTM (Liftgate/Trunk Module) self-test.

Is DTC (Diagnostic Trouble Code) B2699, B2700, B2701 or B2702 present?








2. CHECK THE LIFTGATE LEFT/RIGHT PINCH STRIP STATUS (LFT_PINCH / RT_PINCH) OPERATION

1. Using the scan tool, view LTM (Liftgate/Trunk Module) PIDs (Parameter Identifications).

2. Monitor the LTM (Liftgate/Trunk Module) PIDs (Parameter Identifications) LFT_PINCH and RT_PINCH while activating the left and right pinch strips.

Does the PID (Parameter Identification) state change/agree with the pinch strip status?








3. CHECK FOR CORRECT LTM (Liftgate/Trunk Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all LTM (Liftgate/Trunk Module) connectors.

3. Repair:

- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

4. Reconnect all the LTM (Liftgate/Trunk Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?