Passenger Squib 1 Circuit Open
PASSENGER 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 load tool in the tests below substitutes a suspect squib with a known good component. The use of 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:
With the ignition on.
- Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Squib 1 circuits. The ORC will set this DTC if it detects an open or high resistance on 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: Ensure that 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. Turn the ignition on.
Does the scan tool display: PASSENGER SQUIB 1 CIRCUIT OPEN DTC?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Test.
2. CHECK FOR OPEN SQUIB CIRCUITS IN PASSENGER AIRBAG
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 Squib connector.
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. 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: PASSENGER SQUIB 1 CIRCUIT OPEN DTC?
Yes
- Go To 3
No
- Replace the Passenger Airbag.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. CHECK PASSENGER SQUIB 1 LINE 2 CIRCUIT FOR AN 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 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 connector.
4. Measure the resistance of the Passenger Squib 1 Line 2 circuit between the Passenger Airbag Squib connector and the 8443 ORC Adaptor.
Is the resistance below 1.0 ohm?
Yes
- Go To 4
No
- Repair the Passenger Squib 1 Line 2 circuit for and open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
4. CHECK PASSENGER SQUIB 1 LINE 1 CIRCUIT FOR AN OPEN
1. Measure the resistance of the Passenger Squib 1 Line 1 circuit between the Passenger Airbag Squib connector and the 8443 ORC Adaptor.
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.
- 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.
- Replace the ORC.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Repair the Passenger Squib 1 Line 1 circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.