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Home >> Fiat >> 2018 >> 500 Lounge, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 40 (Occupant Restraint Controller (Orc) - DTCS B0118-95 To U0127-00 - 500 - Electric) >> DTC Troubleshooting >> B0128-13-Front Passenger Buckle Switch - Circuit Open >> 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 ORC DTC.

      Does the scan tool display active B0128-13-FRONT PASSENGER BUCKLE SWITCH - CIRCUIT OPEN DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK (R58) PASSENGER SEAT BELT BUCKLE SWITCH SENSE CIRCUIT AND (R261) PASSENGER SEAT BELT BUCKLE SWITCH GROUND 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. Disconnect the Passenger Seat Belt Buckle Switch harness connector.
    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).
    4. Measure the resistance of the (R58) Passenger Seat Belt Buckle Switch Sense circuit between the Passenger Seat Belt Buckle Switch harness connector and the SRS Load Tool appropriate cavity.
    5. Measure the resistance of the (R261) Passenger Seat Belt Buckle Switch Ground circuit between the Passenger Seat Belt Buckle Switch harness connector and the SRS Load Tool appropriate cavity.

      Is the resistance greater than 1.0 Ohms on any of these circuits?

      Yes 

      • Repair the (R58), (R261) Passenger Seat Belt Buckle Switch circuits for an open.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  3
  3. VERIFY OPEN SWITCH 
    1. Replace the Passenger Seat Belt Buckle Switch. Refer to BUCKLE, SEAT BELT, REMOVAL .
    2. Reconnect the vehicle body harness connector to the Passenger Seat Belt Buckle Switch.
    3. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.
      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. Connect the scan tool to the Data Link Connector - use the most current software available.
    5. Use the scan tool and erase the stored DTCs.
    6. Turn the Ignition OFF, and wait 15 seconds before turning the Ignition ON.
    7. Wait one minute, and read active DTCs and if there are none present read the stored DTCs.

      Does the scan tool display active B0128-13-FRONT PASSENGER BUCKLE SWITCH - CIRCUIT OPEN DTC?

      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.

      WARNING:

      If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.

      No