Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSJEEP2009LIBERTY LIMITED, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSAUDIO SYSTEM (RADIO) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGU0159-LOST COMMUNICATION WITH PARK ASSIST MODULE (PTS)DIAGNOSTIC TEST

2009 Jeep Liberty Limited, RWD

Diagnostic Test

2009 Jeep Liberty Limited, RWDSECTION Diagnostic Test

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
1. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Go to step 2
  No
  - Refer to the Stored Lost Communication diagnostic procedure. Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read active DTCs from all modules.
  NOTE: Check for TIPM configuration, CAN Interior Bus hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Go to and perform the appropriate diagnostic procedure.
  No
  - Go to step 3
VERIFY THAT THE PTS IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, select Network Diagnostics.
3. Verify that the PTS is active on the bus.
  Is the PTS active on the bus?
  
  Yes
  - Go to step 4
  No
  - Perform the No Response diagnostic procedure. Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, select Network Diagnostics.
  Is there more than one module with active DTCs "Logged Against" the PTS?
  
  Yes
  - Replace/update the Park Assist (PTS) Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 5
CLEAR DTC IN MODULE SETTING FAULT
1. With the scan tool, select the module setting the DTC against the Park Assist (PTS) Module.
2. Clear active DTCs.
  Is this DTC still active?
  
  Yes
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 6
CYCLE IGNITION
1. Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
  Does this DTC become active?
  
  Yes
  - Go to step 7
  No
  - The condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS
1. With the scan tool, select Network Diagnostics.
  Does the TIPM and other CAN Interior BUS (125K) modules show Lost Communication with the remaining CAN Interior BUS (125K) modules?
  
  Yes
  - Go to step 8
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
(D265) CAN INTERIOR BUS(+) (125K) CIRCUIT SHORTED TO VOLTAGE
1. Measure the voltage between the (D265) CAN Interior Bus(+) (125K) circuit and ground.
  Is the voltage above 5 volts?
  
  Yes
  - Repair the (D265) CAN Interior Bus(+) (125K) circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 9
(D264) CAN INTERIOR BUS(-) (125K) CIRCUIT SHORTED TO GROUND
1. Turn the ignition off.
2. Measure the resistance between ground and the (D264) CAN Interior Bus(-) (125K) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (D264) CAN Interior Bus(-) (125K) circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.