B1C4F
B1C4F-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT SHORTED TOGETHER
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. These circuits are maintained in a "floating" configuration at the module (connected to neither power nor ground) as protection against inadvertent deployment. Use of the SRS Load Tool Kit 8443A in the tests below substitutes a suspect squib with a known good component. The use of the SRS Load Tool Adapter 8443A provides a test point as well as a method for opening the shorting bar connections within the harness connector.
- When Monitored:
With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Seat Belt Tensioner circuits.
- Set Condition:
The ORC has detected low resistance between the Passenger Seat Belt Tensioner circuits.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.
1. SELECT ACTIVE OR STORED DTC
NOTE: Make sure the battery is fully charged.
NOTE: The scan tool, SRS Airbag Load Tool 8443A, and DVOM are required to perform the following test.
1. Select Active or Stored DTC.
Is the DTC active or stored?
ACTIVE DTC
- Go To 2
STORED DTC
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . Restraints System Intermittent Condition Test
2. CHECK FOR SHORTED PASSENGER SEAT BELT BUCKLE TENSIONER
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 Tensioner connector.
NOTE: Check the connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 to the Passenger Seat Belt Tensioner connector.
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. With the scan tool, read the active ORC DTCs.
Does the scan tool display: B1C4F-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT SHORTED TOGETHER?
Yes
- Go To 3
No
- Replace the Passenger Seat Belt Tensioner.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
3. CHECK (R56) PASSENGER SEAT BELT BUCKLE TENSIONER LINE 1 CIRCUIT FOR A SHORT TO (R54) PASSENGER SEAT BELT BUCKLE TENSIONER LINE 2 CIRCUIT
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 SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 from the Passenger Seat Belt Tensioner connector.
2. Disconnect the ORC connectors.
NOTE: Check the connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adapter 8443-24 to the ORC C1 connector.
NOTE: The Instrument Panel (IP) Harness is always connected to the right side (C1) of the SRS Load Tool Adapter 8443-24.
4. Measure the resistance between the (R56) Passenger Seat Belt Buckle Pretensioner Line 1 circuit cavity 2 and the (R54) Passenger Seat Belt Buckle Tensioner Line 2 circuit cavity 1 at the Passenger Seat Belt Buckle Tensioner connector.
Is the resistance below 10K Ohms?
Yes
- Repair the (R56) Passenger Seat Belt Buckle Tensioner Line 1 circuit for a short to the (R54) Passenger Seat Belt Buckle Tensioner Line 2 circuit.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
No
- 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.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.