B1C4D

B1C4D-1st ROW PASSENGER SEAT BELT BUCKLE TENSIONER CIRCUIT HIGH





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .

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 load tool in the tests below substitutes a suspect squib with a known good component. The use of jumpers and the ORC connector adapter tool provide a test point as well as a method for opening the shorting bar connections within the harness connector.


- When Monitored:
The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500 ms thereafter while the ignition is in on. The module then monitors the data return wire to determine the state of the circuit.

- Set Condition:
This DTC sets when the ORC detects a short to voltage on the squib circuit for more than 2.5 seconds. This DTC transitions from active to stored when the module sees a recovery from a short to voltage for greater than 2.5 seconds.







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


Diagnostic Test


1. DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure the battery is fully charged.

Turn the ignition on.
With the scan tool, read all active ORC DTCs.
Is the DTC active or stored?

ORC - ACTIVE DTC


- Go To 2


ORC - STORED DTC


- Perform *RESTRAINTS SYSTEM INTERMITTENT TEST.Restraints System Intermittent Test.


2. CHECK FOR SHORTED PASSENGER SEAT BELT TENSIONER





WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the Passenger Seat Belt Buckle Tensioner connector.

WARNING: To avoid serious or fatal injury, do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed.


NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 Load Tool and the 8443-20 Jumper to the Passenger Seat Belt Buckle Tensioner connector.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

With the scan tool, read the active ORC DTCs.
Does the scan tool display: B1C4D-1st ROW PASSENGER SEAT BELT BUCKLE TENSIONER CIRCUIT HIGH?

Yes


- Go To3


No

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Replace the Passenger Seat Belt Buckle Tensioner.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test.


3. CHECK (R56) PASSENGER SEAT BELT BUCKLE TENSIONER DATA CIRCUIT AND (R54) PASSENGER SEAT BELT BUCKLE TENSIONER VOLTAGE CIRCUIT FOR A SHORT TO BATTERY





WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the 8443 Load Tool and the 8443-20 Jumper from the Passenger Seat Belt Buckle Tensioner connector.
Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-28 Adaptor to the ORC connectors.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

Measure the voltage of the (R56) Passenger Seat Belt Tensioner Line 1 circuit between the Passenger Seat Belt Buckle Tensioner connector and ground.
Measure the voltage of the (R54) Passenger Seat Belt Tensioner Line 2 circuit between the Passenger Seat Belt Buckle Tensioner connector and ground.
Is there any voltage present on either circuit?

Yes


- Repair or replace the Passenger Seat Belt Buckle Tensioner circuits with voltage present.
- Perform *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 take the proper precautions can result in accidental airbag deployment and serious or fatal injury.


WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.