B1B1A
B1B1A-LEFT SIDE CURTAIN SQUIB 1 CIRCUIT OPEN
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 Left Curtain Squib 1 circuits.
- Set Condition:
The ORC has detected open circuit or high resistance in the Left 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: Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read the active Occupant Restraint Controller Diagnostic Trouble Codes (DTCs).
Does the scan tool display active: B1B1A-LEFT SIDE CURTAIN SQUIB 1 CIRCUIT OPEN?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . Restraints System Intermittent Condition Test
2. PASSENGER AIRBAG OPEN
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 Left Side Curtain Airbag harness connector.
WARNING: Do not place an intact undeployed 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 Left Side Curtain 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 DTCs.
Does the scan tool display active: B1B1A-LEFT SIDE CURTAIN SQUIB 1 CIRCUIT OPEN?
Yes
- Go To 3
No
- Replace the Left Side Curtain Airbag.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. (R3) LEFT CURTAIN SQUIB 1 LINE 1 OR (R1) LEFT CURTAIN SQUIB 1 LINE 2 CIRCUIT OPEN
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 Left 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 resistance of the (R3) Left Curtain Squib 1 Line 1 between the Left Side Curtain Airbag harness connector cavity 2 and the SRS Load Tool Adaptor 8443-25 32 way cavity 3.
5. Measure the resistance of the (R1) Left Curtain Squib 1 Line 2 between the Left Side Curtain Airbag harness connector cavity 1 and the SRS Load Tool Adaptor 8443-25 32 way cavity 4.
Is the resistance below 1.0 Ohm?
Yes
- 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.
No
- Repair open or high resistance in (R3) and (R1) Left Curtain Squib 1 circuits.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.