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B196D






B196D-POWER LIFTGATE OPEN DIRECTION - FULL OPEN SWITCH PERFORMANCE





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
During the Power Liftgate open cycle or liftgate fully closed prior to activation.

- Set Condition:
The Power Liftgate Drive Unit Full Open Switch was detected as closed with the liftgate being fully closed or the latch being fully latched.

The Power Liftgate Drive Unit Full Open Switch was detected as closed before 820 pulses of the Power Liftgate Drive Unit position sensor were counted since the start of the open operation.

The Power Liftgate Drive Unit Full Open Switch remained open after approximately 860 pulses of the Power Liftgate Drive Unit position sensor were counted since the start of the open operation.

May be triggered by an intermittent full open switch failure.





1. DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record and erase DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the power liftgate several times if possible.
4. Refer to Service Information and perform the Power Liftgate Learn Cycle procedure Power Liftgate Learn Cycle
5. Using the scan tool, read ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)s.

Does the scan tool display B196D-POWER LIFTGATE OPEN DIRECTION - FULL OPEN SWITCH PERFORMANCE?

Yes

- Go To 2

No

- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding or obstructions.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. OBSTRUCTION OR STICKING SWITCH
1. Examine the liftgate for proper fit and alignment, foreign material in the drive unit or anything that would cause an obstruction to proper operation of the Full Open Switch.
2. With the scan tool under PLGM, read the FULL OPEN SWITCH state.
3. Manually operate the liftgate while monitoring the scan tool.

Does the switch status change smoothly as the liftgate is pulled down from the full open position?

Yes

- Go To 3

No

- Go To 4

3. (Q51) FULL OPEN SWITCH SENSE CIRCUIT INTERMITTENT SHORT TO GROUND

CAUTION: Never operate the Power Liftgate Drive Unit with the link rod removed as it could damage the Drive Unit.

1. Gain access to the Power Liftgate Drive Unit harness connector.
2. Gain access to the Power Liftgate Module.
3. With the scan tool in Inputs/Outputs, read the FULL OPEN SWITCH state.
4. Make sure the link rod is connected at this time.
5. Manually open the liftgate to mid position.
6. While monitoring the scan tool, wiggle the wiring harness from the Power Liftgate Module to the Full Open Switch on the Power Liftgate Drive Unit assembly.

Did the switch status ever change?

Yes

- Repair the (Q51) Liftgate Full Open Switch Sense circuit for an intermittent short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Power Liftgate Drive Unit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. POWER LIFTGATE DRIVE UNIT - FULL OPEN SWITCH




1. Disconnect the Power Liftgate Drive Unit harness connector.
2. Measure the voltage between the (Q51) Liftgate Full Open Switch Sense circuit and (Q901) Logic Ground in the Drive Unit harness connector.
3. While measuring the voltage, wiggle the harness from the Power Liftgate module to the Power Liftgate Drive Unit harness connector.

Is the voltage constantly above 4.6 Volts?

Yes

- Replace the Power Liftgate Drive Unit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. (Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Measure the resistance between the (Z800) Ground and the (Q51) Liftgate Full Open Switch sense circuit in the Power Liftgate Drive Unit harness connector.

Is the resistance below 1000.0 Ohms?

Yes

- Repair the (Q51) Liftgate Full Open Switch Sense circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 6

6. (Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORT TO (Q901) LOGIC GROUND




1. Measure the resistance between the (Q51) Liftgate Full Open Switch sense circuit and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit harness connector.

Is the resistance below 1000.0 Ohms?

Yes

- Repair the (Q51) Liftgate Full Open Switch Sense circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 7

7. (Q901) LOGIC GROUND OPEN




1. Turn the ignition off.
2. Disconnect the Power Liftgate Drive Unit connector.
3. Measure the resistance between the (Z800) Ground and the (Q901) Logic Ground circuit in the Power Liftgate Drive Unit connector.

Is the resistance below 9.5 Ohms?

Yes

- Go To 8

No

- NOTE: The (Q901) Logic Ground circuit is grounded through the Power Liftgate Module and the (Z800) Ground circuit.
- Repair the (Q901) Logic Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

8. (Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT OPEN




1. Measure the resistance of the (Q51) Liftgate Full Open Switch Sense circuit between the Power Liftgate C1 harness connector and the Power Liftgate Drive Unit harness connector.
2. Wiggle the wiring Power Liftgate Module harness to check for an intermittent open condition.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Power Liftgate Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (Q51) Liftgate Full Open Switch Sense circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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