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.
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HOMESERVICE MANUALSJEEP2009LIBERTY LIMITED, 4WD, PART TIMEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPASSENGER DOOR MODULE (PDM) (DMFL/R) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1D38-PASSENGER MIRROR HEATER CONTROL CIRCUIT HIGHDIAGNOSTIC TEST
2009 Jeep Liberty Limited, 4WD, Part Time
Diagnostic Test
2009 Jeep Liberty Limited, 4WD, Part TimeSECTION Diagnostic Test
- TEST FOR INTERMITTENT CONDITION
- Turn the ignition on.
- With the scan tool, record and erase the DTCs.
- Turn the rear defogger ON.
- Operate the Mirror Switch in all directions several times.
- With the scan tool, read the DTCs.
Does the scan tool display: B1D38-PASSENGER MIRROR HEATER CONTROL CIRCUIT HIGH?
Yes
- Go to step 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
- TEST FOR A SHORTED MIRROR
- Turn the ignition off.
- Disconnect the Passenger Door Module C2 connector.
- Turn the ignition on.
- With the scan tool, erase the DTCs.
- Turn the rear defogger ON.
- Operate the Mirror Switch in all directions several times.
- With the scan tool, read the DTCs.
Does the scan tool display: B1D38-PASSENGER MIRROR HEATER CONTROL CIRCUIT HIGH?
Yes
- Replace the Passenger Door 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
- Inspect the mirror harness wires for a shorted condition and repair as necessary. If the mirror wiring is OK, replace the Mirror in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
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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.