Diagnostic Test

DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record DTCs.
2. Erase DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. If possible, operate the liftgate several times.
5. Using the scan tool, read DTCs.
  Does the scan tool display B1892-POWER LIFTGATE CONTROL CIRCUIT 2 HIGH?
  
  Yes
  - Go to step 2
  No
  - Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors for an intermittent condition.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q89) LIFTGATE CLOSE DRIVER CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Liftgate Close Driver Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Disconnect the Power Liftgate Module C1 harness connector.
2. Disconnect the Power Liftgate Drive Unit harness connector.
3. Measure the voltage between the (Q89) Liftgate Close Driver circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (Q89) Liftgate Close Driver circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
(Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Liftgate Open Driver Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Measure the voltage between the (Q88) Liftgate Open Driver circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (Q88) Liftgate Open Driver circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
(Q88) LIFTGATE OPEN DRIVER CIRCUIT SHORTED TO THE (Q89) LIFTGATE CLOSE DRIVER CIRCUIT

Fig 3: Checking Liftgate Open Driver Circuit Shorted To Liftgate Close Driver Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuit.
  Is the resistance below 10, 000 Ohms?
  
  Yes
  - 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.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Power Liftgate Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .