B1B21
B1B21-RIGHT SIDE CURTAIN AIRBAG SQUIB 1 CIRCUIT HIGH
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 Occupant Restraint Controller (ORC) monitors the voltage on the Right Curtain Squib 1 circuits.
- Set Condition:
When the ORC detects voltage on the Right Curtain Squib 1 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. Turn the ignition on.
2. With the scan tool, read the active Occupant Restraint Controller DTCs.
Does the scan tool display active: B1B21-RIGHT SIDE CURTAIN AIRBAG SQUIB 1 CIRCUIT HIGH?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . Restraints System Intermittent Condition Test
2. RIGHT SIDE CURTAIN AIRBAG SHORTED TO BATTERY
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 Right Side Curtain Airbag harness connector.
WARNING: Do not place an intact uncoupled curtain 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 harness connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit 8443 and the SRS Load Tool Jumper 8443-5 to the Right Side Curtain Airbag harness connector.
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.
3. With the scan tool, read the active Occupant Restraint Controller DTCs.
Does the scan tool display PASSENGER SIDE CURTAIN SQUIB 1 CIRCUIT HIGH?
Yes
- Go To 3
No
- Replace the Right Side Curtain Airbag.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. (R4) RIGHT SIDE CURTAIN SQUIB 1 LINE 2 AND/OR (R2) RIGHT CURTAIN SQUIB 1 LINE 1 SHORTED TO BATTERY.
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 the SRS Load Tool Jumper 8443-5 from the Right Side Curtain Airbag harness connector.
2. Disconnect the ORC harness connectors.
NOTE: Check harness connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adaptor 8443-25 to the ORC harness connectors.
4. Measure the voltage on the (R4) Right Curtain Squib 1 Line 2 circuit between the Right Side Curtain Airbag harness connector cavity 2 and ground.
5. Measure the voltage on the (R2) Right Curtain Squib 1 Line 1 circuits between the Right Side Curtain Airbag harness connector cavity 1 and ground.
Is there any voltage on either circuit?
Yes
- Repair (R4) and (R2) Right Curtain Squib 1 circuits shorted to battery.
- 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.