Pinpoint Test H: The Power Liftgate Does Not Power Open (Power Close OK)

Power Liftgate

Pinpoint Tests

Pinpoint Test H: The Power Liftgate Does Not Power Open (Power Close OK)

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

Normal Operation

If the power liftgate is in the closed position and the conditions are correct, the Liftgate/Trunk Module (LTM) supplies 12 volts to the unlatch/cinching motor on circuit CPR62 (WH/BU), 12 volts to the clutch on circuit CPR69 (BN/BU) and 12 volts to the motor on circuit CPR57 (GN/WH). As the liftgate is moving in the open direction, the LTM monitors the position sensor for door speed to detect obstacles. Once the liftgate is unlatched, the motor and clutch are activated to power open the liftgate.

This pinpoint test is intended to diagnose the following:
- Mechanical binding
- Power liftgate latch
- LTM
- Wiring, terminals or connectors



PINPOINT TEST H: THE POWER LIFTGATE DOES NOT POWER OPEN (POWER CLOSE OK)

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H1 CHECK THE MANUAL OPERATION OF THE LIFTGATE


NOTE: If any other power liftgate related DTCs are present, diagnose those first before proceeding with this pinpoint test. Refer to the Liftgate/Trunk Module (LTM) DTC Chart.

- Ignition ON.
- Unlock all doors.
- Turn the power liftgate OFF (disable) from the message center.
- NOTE: A small amount of interference during a manual operation will be amplified during a power operation and may cause the liftgate to not power open.
- Manually open and close the liftgate.
- Does the liftgate unlatch, open, close and latch correctly?

Yes
GO to H2.

No
If liftgate does not unlatch correctly, REFER to Locks.

If liftgate does not open and close correctly, REFER to Liftgate Liftgate.

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H2 CHECK THE LIFTGATE LATCH AND STRIKER ALIGNMENT


- NOTE: Make sure to inspect the underside of the striker bridge for witness marks.
- Inspect the striker and latch for correct alignment.
- Is the latch and striker aligned correctly?

Yes
Go To Pinpoint Test A. Pinpoint Test A: The Power Liftgate Is Inoperative - Does Not Open Or Close

No
ALIGN the liftgate and striker. REFER to Liftgate Alignment Adjustments. TEST the system for normal operation.

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