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HOMESERVICE MANUALSJEEP2009LIBERTY LIMITED, 4WD, PART TIMEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSPOWER DOOR LOCK SYSTEM (SERVICE INFORMATION)DIAGNOSIS AND TESTINGPOWER LOCKSPRELIMINARY DIAGNOSIS
2009 Jeep Liberty Limited, 4WD, Part Time

Preliminary Diagnosis

2009 Jeep Liberty Limited, 4WD, Part TimeSECTION Preliminary Diagnosis

As a preliminary diagnosis for the power lock system, note the system operation while you actuate both the Lock and Unlock functions with the power lock switches and with the Remote Keyless Entry (RKE) transmitter. Then, proceed as follows:

  • If the entire power lock system fails to function with either the power lock switches or the RKE transmitter, check the fused B(+) fuse in the Junction Block (JB).
  • If the power lock system functions with both power lock switches, but not with the RKE transmitter, proceed to diagnosis of the Remote Keyless Entry (RKE) system. See Electrical/Power Locks/TRANSMITTER, Integrated Key FOB - Diagnosis and Testing .
  • If the driver side power lock switch operates only the driver side front door power lock motor, but all other power lock motors operate with the passenger side power lock switch or the RKE transmitter, use a scan tool and the appropriate diagnostic information to diagnose the Controlled Area Network (CAN).
  • If only one power lock motor fails to operate with both power lock switches and the RKE transmitter, proceed to diagnosis of the power lock motor. See Electrical/Power Locks/MOTOR, Door Lock - Diagnosis and Testing .
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When to See a Mechanic

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

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  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.