B1B2C

B1B2C-1st ROW PASSENGER SEAT BELT PRETENSIONER CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

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 8443 in the tests below substitutes a suspect squib with a known good component. The use of the SRS Load Tool Adapter 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 ORC monitors the resistance of the Passenger Seat Belt Tensioner circuits.

- Set Condition:
The ORC has detected low resistance of the Passenger Seat Belt Tensioner circuits.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.

1. DETERMINE ACTIVE OR STORED DTC

NOTE: Ensure the battery is fully charged.

1. With the scan tool, read the active Occupant Restraint Controller DTCs.
2. Select Active or Stored DTC.

Does the scan tool display active: B1B2C-1st ROW PASSENGER SEAT BELT PRETENSIONER CIRCUIT LOW?

Yes

- Go To 2

No

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . Restraints System Intermittent Condition Test

2. PASSENGER SEAT BELT TENSIONER CIRCUIT SHORTED TO GROUND





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 harness connector(s).

NOTE: Check connectors - Clean and repair as necessary.

2. Connect the SRS Load Tool Kit 8443 and SRS Load Tool Jumper 8443- 8 to the Passenger Seat Belt Tensioner harness connector.

WARNING: Turn the ignition on, then reconnect the 12-volt battery. Failure to follow these instructions may result in possible serious or fatal injury.

3. With the scan tool, read the active Occupant Restraint Controller DTCs.

Does the scan tool display 1st ROW PASSENGER SEAT BELT PRETENSIONER CIRCUIT LOW?

Yes

- Go To 3

No

- Replace the Passenger Seat Belt Tensioner.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

3. (R56) PASSENGER SEAT BELT TENSIONER LINE 1 OR (R54) PASSENGER SEAT BELT TENSIONER LINE 2 SHORTED TO GROUND





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 8443 and Jumper from the Passenger Seat Belt Tensioner harness connector.
2. Disconnect the Occupant Restraint Controller harness connectors.

NOTE: Check connectors - Clean and repair as necessary.

3. Connect the SRS Load Tool Adaptor 8443-25 to the ORC harness connectors.
4. Measure the resistance of the (R56) Passenger Seat Belt Tensioner Line 1 circuit between the Passenger Seat Belt Tensioner harness connector and ground.
5. Measure the resistance of the (R54) Passenger Seat Belt Tensioner Line 2 circuit between the Passenger Seat Belt Tensioner harness connector and ground.

Is the resistance below 10K Ohms on either circuit?

Yes

- Repair (R56) Passenger Seat Belt Tensioner Line 1 or (R54) Passenger Seat Belt Tensioner Line 2 shorted to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System 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 Occupant Restraint Controller.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.