B1B08
B1B08-PASSENGER AIRBAG SQUIB 1 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 Supplementary Restraint System (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 Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Squib 1 circuits.
- Set Condition:
The ORC has detected low resistance of the Passenger Squib 1 circuits.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read the active Occupant Restraint Controller (ORC) Diagnostic Trouble Codes (DTCs).
Does the scan tool display active: B1B08-PASSENGER AIRBAG SQUIB 1 CIRCUIT LOW?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . Restraints System Intermittent Condition Test
2. PASSENGER AIRBAG 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 Airbag harness connector.
WARNING: Do not place an intact undeployed airbag face down on a hard surface, the airbag propels into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Check harness connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit 8443 to the Passenger Airbag 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 (ORC) DTCs.
Does the scan tool display active: B1B08-PASSENGER AIRBAG SQUIB 1 CIRCUIT LOW?
Yes
- Go To 3
No
- Replace the Passenger Airbag.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. (R42) PASSENGER SQUIB 1 LINE 1 OR (R44) PASSENGER SQUIB 1 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 from the Passenger Airbag harness connector.
2. Disconnect the ORC harness connectors.
NOTE: Check harness connectors - Clean and repair as necessary.
3. Connect the Load Tool SRS Load Tool Adaptor 8443-25 to the ORC harness connectors.
4. Measure the resistance of the (R42) Passenger Squib 1 Line 1 circuit between the Passenger Airbag harness connector cavity 2 and ground.
5. Measure the resistance of the (R44) Passenger Squib 1 Line 2 circuit between the Passenger Airbag harness connector cavity 1 and ground.
Is the resistance below 10K Ohms on either circuit?
Yes
- Repair (R42) and (R44) Passenger Squib 1 circuits 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 ORC.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.