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 B1942-POWER LIFTGATE POSITION SENSOR 2 CIRCUIT PERFORMANCE?
  
  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 .
(Q901) LOGIC GROUND OPEN

Fig 1: Checking Logic Ground Open
Courtesy of CHRYSLER LLC
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 step 3
  No
  - Repair the (Q901) Logic Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO GROUND

Fig 2: Checking Position Sensor Signal 2 Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. Disconnect the Power Liftgate Module C1 harness connector.
2. Measure the resistance between ground and the (Q205) Position Sensor Signal 2 circuit
  Is the resistance below 10, 000 Ohms?
  
  Yes
  - Repair the (Q205) Position Sensor Signal 2 circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
(Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE

Fig 3: Checking Position Sensor Signal 2 Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage between ground and the (Q205) Position Sensor Signal 2 circuit
  Is there any voltage present?
  
  Yes
  - Repair the (204) Position Sensor Signal 2 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 5
(Q205) POSITION SENSOR SIGNAL 2 CIRCUIT OPEN

Fig 4: Checking Position Sensor Signal 2 Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (Q205) Position Sensor Signal 2 circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the (Q205) Position Sensor Signal 2 circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q203) POSITION SENSOR SUPPLY CIRCUIT OPEN

Fig 5: Checking Position Sensor Supply Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (Q203) Position Sensor Supply circuit between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 7
  No
  - Repair the (Q203) Position Sensor Supply circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORTED TO GROUND

Fig 6: Checking Position Sensor Supply Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (Q203) Position Sensor Supply circuit.
  Is the resistance below 10, 000 Ohms?
  
  Yes
  - Repair the (Q203) Position Sensor Supply circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 8
(Q203) POSITION SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 7: Checking Position Sensor Supply Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage between the (Q901) Logic Ground circuit and the (Q203) Position Sensor Supply circuit in the Power Liftgate Drive Unit connector.
  Is the voltage above 5.5 Volts?
  
  Yes
  - Repair the (Q203) Position Sensor Supply circuit for a short to voltage. If the power liftgate is inoperative after repairing the (Q203) Position Sensor Supply circuit, 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
  - Go to step 9
(Q205) POSITION SENSOR SIGNAL 2 CIRCUIT SHORTED TO THE (Q204) POSITION SENSOR SIGNAL 1 CIRCUIT

Fig 8: Checking Position Sensor Signal 1 Circuit Shorted To Position Sensor Signal 2 Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (Q205) Position Sensor Signal 2 circuit and the (Q204) Position Sensor Signal 1 circuit.
  Is the resistance below 10, 000 Ohms?
  
  Yes
  - Repair the (Q205) Position Sensor Signal 2 circuit for a short to the (Q204) Position Sensor Signal 1 circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 10
POWER LIFTGATE MODULE

Fig 9: Checking Power Liftgate Module
Courtesy of CHRYSLER LLC
1. Reconnect the Power Liftgate Module C1 harness connector.
2. Reconnect the Power Liftgate Module C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (Q204) Position Sensor Signal 1 circuit and the (Q203) Position Sensor Supply circuit ground in the Power Liftgate Drive Unit harness connector.
  Is the voltage approximately 5.0 Volts for both measurements?
  
  Yes
  - 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 .