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HOMESERVICE MANUALSJEEP2008LIBERTY SPORT, RWD, STANDARDREPAIR AND DIAGNOSISRESTRAINTSSEAT BELTSDTCS B1C4C TO U0171B212D-IGNITION RUN ONLY INPUT CIRCUIT OPENDIAGNOSTIC TEST
2008 Jeep Liberty Sport, RWD, Standard

Diagnostic Test

2008 Jeep Liberty Sport, RWD, StandardSECTION Diagnostic Test
  1. VERIFY THAT DTC B212D-IGNITION RUN ONLY INPUT CIRCUIT OPEN IS ACTIVE 
    NOTE: Ensure the battery is fully charged.

    Turn the ignition on.

    Wait 10 seconds.

    With the scan tool, read Occupant Restraint Controller (ORC) and Occupant Classification Module (OCM) DTCs.

    Does the scan tool display active: B212D-IGNITION RUN ONLY INPUT CIRCUIT OPEN? 

    Yes 

    1. Go To  2.

    No 

    1. Go To  8.
  2. INSPECT AIRBAG RUN CIRCUIT FUSE 51 

    Turn the ignition off.

    Remove the TIPM Fuse 51 and inspect the fuse.

    NOTE: Check connectors - Clean and repair as necessary.

    Is the fuse open? 

    Yes 

    1. Go To  3.

    No 

    1. Go To  5.
  3. CHECK (F100) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND 
    Fig 1: Measuring Resistance Of (F100) Fused Run Relay Output Circuit Between TIPM Fuse 51 (Output Side) Terminal And Ground
    GC0061868Courtesy of CHRYSLER LLC

    Measure the resistance of the (F100) Fused Run Relay Output circuit between the TIPM Fuse 51 (output side) terminal and ground.

    Is the resistance below 100.0 ohms? 

    Yes 

    1. Go To  4.

    No 

    1. Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
    2. Replace TIPM Fuse 51.
    3. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  4. CHECK (F100) FUSED IGNITION SWITCH OUTPUT CIRCUIT RESISTANCE WITH ORC DISCONNECTED 
    Fig 2: Measuring Resistance Of (F100) Fused Run Relay Output Circuit Between TIPM Fuse 51 (Output Side) Terminal And Ground
    GC0061868Courtesy of CHRYSLER LLC
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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.