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 ORC DTCs.
  Does the scan tool display active B0127-11-FRONT DRIVER BUCKLE SWITCH - CIRCUIT SHORT TO GROUND DTC?
  
  Yes
  - Go To 2
  No
  - Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to RESTRAINTS SYSTEM INTERMITTENT TEST .
CHECK DRIVER SEAT BELT BUCKLE SWITCH CIRCUITS FOR A SHORT TO GROUND

Fig 1: Checking Driver Seat Belt Buckle Switch Circuits For A Short To Ground
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 Driver Seat Belt Buckle Switch harness connector.
  NOTE:
  Check connectors - Clean and repair as necessary.
2. Measure the resistance of the (R57) Driver Seat Belt Buckle Switch Sense circuit between the appropriate terminal of the Driver Seat Belt Buckle Switch harness connector and ground.
3. Measure the resistance of the (R59) Driver Seat Belt Buckle Switch Ground circuit between the appropriate terminal of the Driver Seat Belt Switch harness connector and ground.
  Is the resistance below 10k Ohms on any of these circuits?
  
  Yes
  - Repair the (R57) or (R59) Driver Seat Belt Buckle Switch circuits for a short to ground in accordance with the Service Information.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE DRIVER SEAT BELT SWITCH CIRCUITS FOR A SHORT TO GROUND

Fig 2: Checking The Driver Seat Belt Switch Circuits For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (R57) Driver Seat Belt Buckle Switch Sense circuit and (R59) Driver Seat Belt Buckle Switch Ground circuit at the appropriate terminals of the Driver Seat Belt Buckle Switch harness connector.
  Is the resistance below 10k Ohms on any of these circuits?
  
  Yes
  - Repair the (R57) Driver Seat Belt Buckle Switch Sense circuit for a short to the (R59) Driver Seat Belt Buckle Switch Ground circuit in accordance with the Service Information.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  No
  - Go To 4
CHECK OPERATION OF THE DRIVER SEAT BELT BUCKLE SWITCH
1. Replace the Driver Seat Belt Buckle Switch in accordance with the Service Information. Refer to BUCKLE, SEAT BELT, REMOVAL .
2. Reconnect the vehicle body harness connector to the Driver 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 codes in all airbag system modules.
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 B0127-11-FRONT DRIVER BUCKLE SWITCH - CIRCUIT SHORT TO GROUND 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.
  - Replace the Occupant Restraint Controller (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 .