B196E

B196E-POWER LIFTGATE CLOSE DIRECTION - FULL OPEN SWITCH PERFORMANCE





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
During the Power Liftgate close cycle.

- Set Condition:
The Full Open Switch was detected as remaining closed for more than 50 counts since the start of the close operation.

May be triggered by an intermittent full open switch failure.





Diagnostic Test

1. DTC PRESENT
With the scan tool, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power liftgate several times if possible.
With the scan tool, read ACTIVE DTCs.
Does the scan tool display B196E-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 BODY VERIFICATION TEST - VER 1. Body Verification Test

2. OBSTRUCTION OR STICKING SWITCH
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.
With the scan tool in Inputs/Outputs, read the FULL OPEN SWITCH state.
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) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT INTERMITTENT SHORT TO GROUND
CAUTION: Never operate the Power Lift Gate Drive Unit with the link rod removed as it could damage the Drive Unit.

Gain access to the Power Liftgate Drive Unit connector.
Gain access to the Power Liftgate Module.
With the scan tool in Inputs/Outputs, read the FULL OPEN SWITCH state.
Ensure the link rod is connected at this time.
Manually open the liftgate to mid position.
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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Liftgate Drive Unit.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

4. (Q51) LIFTGATE FULL OPEN SWITCH SENSE CIRCUIT SHORT TO GROUND




Disconnect the Power Liftgate Drive Unit connector.
Measure the voltage between (Q51) Liftgate Full Open Switch Sense circuit and the (Q901) Logic Ground.
While measuring the voltage, wiggle the harness from the PLG module to the Drive Unit connector.
Is the voltage constantly above 4.6 volts?

Yes

- Replace the Drive Unit.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 5

5. (Q51) LIFTGATE FULL OPEN SWITCH SENSE WIRE SHORT TO GROUND




Turn the ignition off.
Disconnect the Power Liftgate Module C1 connector
Measure the resistance between the (Q901) Logic Ground circuit and the (Q51) Liftgate Full Open Switch Sense circuit in the Drive Unit connector.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (Q51) Full Open Switch Sense circuit for a short to ground.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6. (Q51) LIFTGATE FULL OPEN SWITCH SENSE WIRE OPEN




Measure the resistance of the (Q51) Liftgate Full Open Switch Sense circuit between the PLG C1 connector and the Drive Unit connector.
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 5.0 ohms?

No

- Repair the (Q51) Full Open Switch Sense circuit for an intermittent open.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

Yes

- Go To 6

7. (Q901) LOGIC GROUND OPEN




Reconnect the Power Liftgate Module C1 connector
Measure the resistance between the (Z805) Ground and the (Q901) Logic Ground circuit in the Drive Unit connector.
Wiggle the harness and check for an intermittent open condition.
Is the resistance below 2.0 ohms?

Yes

- Replace the Power Liftgate Module.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (Q901) Logic Ground circuit for an open.
- PERFORM BODY VERIFICATION TEST - VER 1. Body Verification Test