B1B0C
B1B0C-PASSENGER AIRBAG SQUIB 2 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 or 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 the ORC connector adapter tool provides a test point as well as a method for opening the shorting bar connections within the harness.
- When Monitored:
The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500ms thereafter while the ignition is on. With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Squib 2 circuits.
- Set Condition:
This DTC sets when the ORC detects a short to ground 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 ground for greater than 2.5 seconds.
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.
NOTE: The scan tool, SRS Airbag Load Tool MRL 8443, and DVOM are required to perform the following test.
1. Select Active or Stored DTC.
Is the DTC active or stored?
ORC - ACTIVE DTC
- Go To 2
ORC - STORED DTC
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST . Restraints System Intermittent Condition Test
2. CHECK FOR SHORTED SQUIB CIRCUITS IN PASSENGER AIRBAG
WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Disconnect the Passenger Airbag Squib connector.
WARNING: Do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Check connectors - Clean and repair as necessary.
2. Connect the 8443 Load Tool to the Passenger Airbag Squib 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: B1B0C PASSENGER AIRBAG SQUIB 2 CIRCUIT LOW?
Yes
- Go To 3
No
- WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- Replace the Passenger Airbag.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST Restraints System Verification Test.
3. CHECK (R64) PASSENGER SQUIB 2 LINE 1 CIRCUIT AND (R62) PASSENGER SQUIB 2 LINE 2 CIRCUIT FOR A SHORT TO GROUND
WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Disconnect the 8443 Load Tool from the Passenger Airbag Squib connector.
2. Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
3. Connect the 8443 Load Tool ORC Adaptor to the ORC C2 connector.
4. Measure the resistance of the (R64) Passenger Squib 2 Line 1 circuit between ground and the Passenger Airbag Squib connector.
5. Measure the resistance of the (R62) Passenger Squib 2 Line 2 circuit between ground and the Passenger Airbag Squib connector.
Is the resistance below 5K ohms on either circuit?
Yes
- Repair the Passenger Squib 2 circuits with a resistance below 5K ohms for a short 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 take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.
- Replace the ORC.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST Restraints System Verification Test.