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 the ORC DTCs.
  Does the scan tool display active B0128-11-FRONT PASSENGER BUCKLE SWITCH - CIRCUIT SHORT TO GROUND DTC?
  
  Yes
  - Go To 2
  No
  - Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to RESTRAINTS SYSTEM INTERMITTENT TEST .
PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORTED TO GROUND

Fig 1: Checking Passenger Seat Belt Switch Signal Circuit Shorted 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 Passenger Seat Belt Switch harness connector.
2. Disconnect the ORC harness connectors.
  NOTE:
  Check harness 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
3. Connect the SRS Load Tool (special tool #8443-25, 56 Way ACM Adapter) to the ORC harness connectors.
4. Measure the resistance 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 the resistance below 10.0 Ohms?
  
  Yes
  - Repair or replace the (R58) Passenger Seat Belt Switch Signal circuit for a short to ground.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  No
  - Go To 3
PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
1. Replace the Passenger Seat Belt Switch. Refer to BUCKLE, SEAT BELT, REMOVAL .
2. Disconnect the SRS Load Tool (special tool #8443-25, 56 Way ACM Adapter).
3. Reconnect 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. With the scan tool, read all active ORC DTCs.
  Does the scan tool display active B0128-11-FRONT PASSENGER 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 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
  - The repair is complete.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .