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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Air Bag Restraint System - Electrical Diagnostics >> DTC Troubleshooting >> B212C-Ignition Run/Start Input Circuit Open >> Diagnostic Test
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Diagnostic Test

  1. VERIFY THAT DTC B212C-IGNITION RUN/START INPUT CIRCUIT OPEN IS ACTIVE IN THE ORC 
    NOTE: Make sure the battery is fully charged.
    1. Turn the ignition on.
    2. With the scan tool, read ORC DTCs.

      Does the scan tool display active: B212C-IGNITION RUN/START INPUT CIRCUIT OPEN?

      Yes 

      • Go to step  2

      No 

  2. INSPECT AIRBAG RUN-START FUSE 
    1. Turn the ignition off.
    2. Remove the Airbag Run-Start Fuse 29 from the IPM and inspect the fuse.
      NOTE: Check connectors - Clean and repair as necessary.

      Is the Run/Start fuse open?

      Yes 

      • Go to step  3

      No 

      • Go to step  5
  3. CHECK (F201) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT RESISTANCE 
    Fig 1: Checking Fused Ignition Switch Output (Run-Start) Circuit Resistance
    GC0119690Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (F201) Fused Ignition Switch Output (Run-Start) circuit between ground and the Airbag Run-Start fuse terminal (output).

      Is the resistance below 100.0 Ohms?

      Yes 

      • Go to step  4

      No 

  4. CHECK (F201) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT RESISTANCE WITH THE ORC CONNECTORS DISCONNECTED 
    Fig 2: Checking Fused Ignition Switch Output (Run-Start) Circuit Resistance With Occupant Restraint Controller Connectors Disconnected
    GC0119691Courtesy of CHRYSLER LLC
    WARNING: If the Occupant Restraint Controller is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.
    WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
    1. Disconnect both ORC connectors.
      NOTE: Check the connectors - Clean and repair as necessary.
    2. Connect the SRS Load Tool Adapter 8443-24 to the ORC C2 connector.
    3. Measure the resistance of the (F201) Fused Ignition Switch Output (Run-Start) circuit between the 8443-24 adaptor cavity C2-16 and ground.

      Is the resistance below 100.0 Ohms?

      Yes 

      • Repair the (F201) Fused Ignition Switch Output (Run-Start) circuit for a short to ground.
      • Replace the Airbag Run-Start Fuse.
      • Perform the ORC VERIFICATION TEST

      No 

  5. CHECK (F944) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN 
    Fig 3: Checking Ignition Switch Output (Run-Start) Circuit For An Open
    GC0119692Courtesy of CHRYSLER LLC
    1. Turn the ignition on.
    2. Measure the voltage between Ground and the (F944) Ignition Switch Output (Run-Start) circuit at the Airbag Run-Start fuse terminal (supply).

      Is the voltage above 6.5 volts?

      Yes 

      • Go to step  6

      No 

  6. CHECK (F20) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN 
    Fig 4: Checking Fused Ignition Switch Output (Run-Start) Circuit For An Open
    GC0119693Courtesy of CHRYSLER LLC
    WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
    1. Reinstall the Airbag Run-Start Fuse.
    2. Disconnect the both ORC connectors.
      NOTE: Check connectors - Clean and repair as necessary.
    3. Install the Airbag Load tool ORC 8443-24 adaptor to the ORC C2 connector.
      WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
    4. Measure the voltage of the (F201) Fused Ignition Switch Output (Run-Start) Circuit between the 8443-24 adapter cavity C2-16 and ground.

      Is the voltage above 6.5 volts?

      Yes 

      No