Diagnostic Test

DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
1. Using the scan tool, record and erase DTCs.
2. Turn the ignition off, wait 10 seconds, then turn the ignition on.
3. Operate the Power Liftgate several times from stop to stop if possible.
4. Using the scan tool, read ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)s.
  Does the scan tool display B1969-POWER LIFTGATE OPEN DIRECTION EXCESSIVE POSITION SENSOR COUNTS?
  
  Yes
  - Go to step 2
  No
  - Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
BINDING LIFTGATE
1. Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop assembly, loose/hard weatherstrip, for wear or anything that would cause an obstruction to proper operation.
2. If necessary manually operate the power liftgate on a known good vehicle and notice the effort needed to open and close for comparison.
  Were there any mechanical problems found?
  
  Yes
  - Refer to Service Information for the related symptom(s).
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
POWER LIFTGATE MODULE - POSITION SENSE OPEN
1. Operate the liftgate from the full closed position and put an obstacle in its path to make it reverse.
  Did the liftgate reverse back to the closed position?
  
  Yes
  - Go to step 4
  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 .
(Q51) FULL OPEN SWITCH CIRCUIT OPEN

Fig 1: Checking Full Open Switch Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (Q51) Full Open Switch circuit between the Power Liftgate Drive Unit connector and the Power Liftgate Module C1 connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (Q51) Full Open Switch circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE POWER LIFTGATE DRIVE UNIT
NOTE: DTC B1969 will set when the position sensor count is 890 or above in open direction. In a normally operating power liftgate system, the position sensor count for fully open is between 820 and 860. Fully closed normal count is 0.
1. Reconnect the Power Liftgate Drive Unit harness connector.
2. Turn the ignition on.
3. Attempt to power open the power liftgate.
4. Using the scan tool, check the power liftgate position sensor counts.
  Is the power liftgate drive unit position sensor count above 890 with the power liftgate in the full open position, or if the liftgate is closed, is the position count above or below 0 counts?
  
  Yes
  - Replace the Liftgate Drive Unit in accordance with Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Diagnosis and Testing .
  No
  - Replace the Power Liftgate Module in accordance with Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Diagnosis and Testing .