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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Occupant Restraint Controller (Orc) - DTCS B0118-95 To U0127-00 - 500 - Electric) >> DTC Troubleshooting >> B0128-12-Front Passenger Buckle Switch - Circuit Short To Battery >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. VERIFY ACTIVE DTC 
    NOTE:

    Make sure the battery is fully charged.

    1. Turn the ignition on.
    2. With the scan tool, read all ORC DTCs.

      Does the scan tool display active B0128-12-FRONT PASSENGER BUCKLE SWITCH - CIRCUIT SHORT TO BATTERY DTC?

      Yes 

      • Go To  2

      No 

  2. (R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    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 the Passenger Seat Belt Buckle Tensioner connector containing the Seat Belt Switch circuits.
    2. Disconnect the ORC harness connectors.
      NOTE:

      Check connectors - Clean and repair as necessary.

      NOTE:

      Probing of the circuit cavities at the ORC Module body harness connectors is only to be done with a approved test lead from the (special tool #10159, Test Leads, Dedicated), test lead 10159-6. Or a comparable test lead to prevent vehicle wiring harness connector damage during diagnostic procedures.

    3. Connect the test probes to the appropriate ORC harness connector terminal(s).
      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 (R58) Passenger Seat Belt Switch Signal circuit between the appropriate terminal of the SRS Load Tool and ground.

      Is there any voltage present on the circuit?

      Yes 

      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.

      • Repair the (R58) Passenger Seat Belt Switch Signal circuit for a short to voltage.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  3
  3. (R261) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE 
    1. Measure the voltage of the (R261) Passenger Seat Belt Switch Ground circuit between the appropriate terminal of the SRS Load Tool and ground.

      Is there any voltage present on the circuit?

      Yes 

      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.

      • Repair or replace the (R261) Passenger Seat Belt Switch Ground circuit for a short to voltage.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  4
  4. (R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT FOR AN OPEN 
    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. Measure the resistance of the (R58) Passenger Seat Belt Switch Signal circuit between the Passenger Seat Belt Buckle Tensioner harness connector and the appropriate terminal of the SRS Load Tool.

      Is the resistance below 1.0 Ohm?

      Yes 

      • Go To  5

      No 

      • Repair or replace the (R58) Passenger Seat Belt Switch Signal circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  5. (R261) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (R261) Passenger Seat Belt Switch Ground circuit between the Passenger Seat Belt Buckle Tensioner harness connector and the appropriate terminal of the SRS Load Tool.

      Is the resistance below 1.0 Ohm?

      Yes 

      • Go To  6

      No 

      • Repair or replace the (R261) Passenger Seat Belt Switch Ground circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  6. CHECK OPERATION OF THE 1st ROW PASSENGER SEAT BELT SWITCH 
    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. Replace the Passenger Seat Belt Switch. Refer to BUCKLE, SEAT BELT, REMOVAL .
    2. Reconnect the vehicle body harness to the switch.
      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.

    3. Connect the scan tool to the Data Link Connector - use the most current software available.
    4. Use the scan tool and erase all codes in the ORC.
    5. Turn the ignition off, and wait 15 seconds before turning the Ignition On.
    6. Wait one minute, and read active codes.

      Did the active B0128-12-FRONT PASSENGER BUCKLE SWITCH - CIRCUIT SHORT TO BATTERY DTC return?

      Yes 

      WARNING:

      If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible 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.

      No 

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