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B196E






B196E-00-POWER LIFTGATE CLOSE DIRECTION - FULL OPEN SWITCH PERFORMANCE





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

Theory of Operation

The Full Open Switch indicates when the gate is a few degrees from full open position. The switch is closed when the liftgate is fully open and the switch is open when the liftgate is either fully closed and latched or between full open and closed. It can be checked by manually opening and closing the liftgate while monitoring the scan tool.

- When Monitored:
During the Power Liftgate close cycle.

- Set Condition:
The Full Open Switch was detected as remaining closed after the liftgate closed 20% from start of the close operation.

May be triggered by an intermittent full open switch failure.





1. DTC PRESENT
1. With the scan tool, record and erase the DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the power liftgate several times if possible.
4. With the scan tool, read Active DTCs.

Does the scan tool display; B196E-00-POWER LIFTGATE CLOSE 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 from the full open to mid position several times 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) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT INTERMITTENT SHORTED TO GROUND
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. Manually open the liftgate to mid position.
5. While monitoring the scan tool, wiggle the wiring harness from the Power Liftgate Module to 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. (Q901) LOGIC GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Power Liftgate Module C2 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Measure the resistance of both (Q901) Logic Ground circuits between the Power Liftgate Drive Unit connector and the Power Liftgate Module C2 harness connector.

Is the resistance below 2.0 Ohms on both measurements?

Yes

- Go To 5

No

- Repair the (Q901) Logic Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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




1. Re-connect the Power Liftgate Module C2 harness connector.
2. Turn the ignition on.
3. Measure the voltage between (Q51) Liftgate Full Open Switch Sense circuit and the (Q901) Logic Ground in the Power Driver Unit connector.
4. While measuring the voltage, wiggle the Power Liftgate Module to check for an intermittent short.

Is the voltage constantly above 4.6 volts?

Yes

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

No

- Go To 6

6. (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 Ground and the (Q51) Liftgate Full Open Switch Sense circuit in the Power Liftgate Drive Unit connector.

Is the resistance below 1,000 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. (Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORTED TO THE (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 the (Q901) Logic Ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 8

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




1. Measure the resistance of the (Q51) Liftgate Full Open Switch Sense circuit between the PLG C1 connector and the Drive Unit connector.
2. Wiggle the wiring harness from the Power Liftgate Module to the Full Open Switch on the Power Liftgate Drive Unit assembly.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Power Liftgate Module. Power Liftgate Control Module - Removal.
- 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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