Diagnostic Test

With the scan tool, record DTCs.

Erase DTCs.

Turn the ignition off, wait 10 seconds, then turn the ignition on.

If possible, operate the liftgate several times.

With the scan tool, read DTCs.

Does the scan tool display B1892-POWER LIFTGATE CONTROL CIRCUIT 2 HIGH? 

Yes 

1. Go to  2).

No 

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
2. Perform BODY VERIFICATION TEST .

Fig 1: Measuring Voltage Between Liftgate Close Driver Circuit And Ground

Courtesy of CHRYSLER LLC

Disconnect the Power Liftgate Module C1 harness connector.

Disconnect the Power Liftgate Drive Unit harness connector.

Measure the voltage between the (Q89) Liftgate Close Driver circuit and ground.

Is there any voltage present? 

Yes 

1. Repair the (Q89) Liftgate Close Driver circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST .

No 

1. Go to  3).

Fig 2: Measuring Voltage Between Liftgate Open Driver Circuit And Ground

Courtesy of CHRYSLER LLC

Measure the voltage between the (Q88) Liftgate Open Driver circuit and ground.

Is there any voltage present? 

Yes 

1. Repair the (Q88) Liftgate Open Driver circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST .

No 

1. Go to  4).

Fig 3: Measuring Resistance Between Liftgate Open Driver Circuit And Liftgate Close Driver Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.

Is the resistance below 10000.0 ohms? 

No 

1. Replace the Power Liftgate Module in accordance with service information.
2. Perform BODY VERIFICATION TEST .

Yes 

1. Repair the (Q88) Liftgate Open Driver circuit for a short to the (Q89) Liftgate Close Driver circuit. If the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit are OK, replace the Power Liftgate Drive Unit in accordance with the service information.
2. Perform BODY VERIFICATION TEST .