Pinpoint Test F: The Power Liftgate Does Not Operate Correctly - Pinch Strip Does Not Stop/Reverse The Liftgate

Power Liftgate

Pinpoint Tests

Pinpoint Test F: The Power Liftgate Does Not Operate Correctly - Pinch Strip Does Not Stop/Reverse the Liftgate

Refer to Wiring Diagram Set 109, Power Liftgate/Retractable Running Board for schematic and connector information. Diagrams By Number

Normal Operation

When the power liftgate moves in the close direction, the Liftgate/Trunk Module (LTM) monitors the pinch strips and position sensor for obstacle detection. The LTM uses a 5-volt reference signal on circuit CPR52 (YE/VT) and a return signal on circuit RPR52 (VT/GY) for the left pinch strip. The LTM uses a 5-volt reference signal on circuit CPR51 (YE/OG) and a return signal on circuit RPR52 (VT/GY) for the right pinch strip. The right and left pinch strip return signal circuits are spliced together.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Pinch strip(s)
- LTM



PINPOINT TEST F: THE POWER LIFTGATE DOES NOT OPERATE CORRECTLY - PINCH STRIP DOES NOT STOP/REVERSE THE LIFTGATE

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F1 RETRIEVE THE DTCs FROM THE LTM


- Use the recorded LTM DTCs from the continuous and LTM self-tests.
- Is DTC B2699, B2700, B2701 or B2702 present?

Yes
Go To Pinpoint Test G. Pinpoint Test G: The Power Liftgate Does Not Power Close (Power Open OK)

No
GO to F2.

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F2 CHECK THE LIFTGATE LEFT/RIGHT PINCH STRIP STATUS (LFT_PINCH / RT_PINCH) OPERATION


- Enter the following diagnostic mode on the scan tool: DataLogger - LTM.
- Monitor the LTM PIDs LFT_PINCH and RT_PINCH while activating the left and right pinch strips.
- Does the PID state change/agree with the pinch strip status?

Yes
GO to F3.

No
INSTALL a new left or right pinch strip switch. REFER to Pinch Strip Switch Service and Repair. TEST the system for normal operation.

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F3 CHECK FOR CORRECT LTM OPERATION


- Disconnect all the LTM connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all the LTM connectors and make sure they are seated correctly.
- Make sure the liftgate is fully CLOSED.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new LTM. REFER to Liftgate/Trunk Module (LTM) Service and Repair. REPEAT the LTM self-test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the LTM self-test.

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