Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

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
  - Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to RESTRAINTS SYSTEM INTERMITTENT TEST .
(R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Passenger Seat Belt Switch Signal Circuit Shorted To Voltage
Courtesy of CHRYSLER GROUP, 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. Disconnect the Passenger Seat Belt Buckle Tensioner connector containing the Seat Belt Switch circuits.
2. Disconnect the ORC harness connector.
  NOTE:
  Check connectors - Clean and repair as necessary.
  
  NOTE:
  After disconnecting the ORC module and the ORC module body harness connector, check the ORC module body harness connector shorting bar pin location. The shorting bar pin location should be down and not visible through the larger center holes of the ORC module body harness connector.
  
  Fig 2: Occupant Restraint Controller (ORC) C1 & C2 Harness Connector End View
  Courtesy of CHRYSLER GROUP, LLC
  
  NOTE:
  Check connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool (special tool #8443-25, 56 Way ACM Adapter) to the ORC harness connectors.
  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 (special tool #8443-25, 56 Way ACM Adapter) 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
(R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE

Fig 3: Checking Passenger Seat Belt Switch Ground Circuit Shorted To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage of the (R60) Passenger Seat Belt Switch Ground circuit between the appropriate terminal of the SRS Load Tool (special tool #8443-25, 56 Way ACM Adapter) 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 (R60) 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
(R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT FOR AN OPEN

Fig 4: Checking Passenger Seat Belt Switch Signal Circuit For An Open
Courtesy of CHRYSLER GROUP, 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. 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 (special tool #8443-25, 56 Way ACM Adapter).
  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 .
(R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT FOR AN OPEN

Fig 5: Checking Passenger Seat Belt Switch Ground Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (R60) Passenger Seat Belt Switch Ground circuit between the Passenger Seat Belt Buckle Tensioner harness connector and the appropriate terminal of the SRS Load Tool (special tool #8443-25, 56 Way ACM Adapter).
  Is the resistance below 1.0 Ohm?
  
  Yes
  - Go To 6
  No
  - Repair or replace the (R60) Passenger Seat Belt Switch Ground circuit for an open or high resistance.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
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.
  - Replace the ORC in accordance with the Service Information. Refer to MODULE, OCCUPANT RESTRAINT CONTROLLER, REMOVAL .
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  No
  - Repair is complete.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .