Restraints
9220-PASSENGER SQUIB 1 CIRCUIT OPEN
For a complete wiring diagram Consult Diagrams/Electrical.
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the Passenger Airbag 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 8443 Load Tool in the tests below substitutes a suspect squib with a known good component. The use of the ORC adapter tool provide a test point as well as a method for opening the shorting bar connections within the harness connector.
- When Monitored:
The ORC sends out a 40mA diagnostic current on each squib voltage supply circuit at power up and every 500ms thereafter while the ignition is in on. The module then monitors the data return wire to determine the state of the circuit.
- 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.
Diagnostic Test
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.
Turn the ignition on.
With the scan tool, read the active ORC DTC.
SELECT ACTIVE or STORED DTC:
ACTIVE DTC
- Go To 2
STORED DTC
- Perform *RESTRAINTS SYSTEM INTERMITTENT TEST. .
2. CHECK FOR OPEN SQUIB CIRCUITS IN PASSENGER AIRBAG
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the Passenger Airbag Squib connector.
WARNING: To avoid personal injury or death, do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed.
NOTE: Check connectors - Clean and repair as necessary.
Connect the 8443 Load Tool and the 8443-8 Jumper to the Passenger Airbag Squib connector.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, read the active ORC DTCs.
Does the scan tool display: 9220-PASSENGER SQUIB 1 CIRCUIT OPEN?
Yes
- Go To 3
No
- Replace the Passenger Airbag.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.
3. CHECK PASSENGER SQUIB 1 LINE 1 CIRCUIT FOR AN OPEN
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the 8443 Load Tool and the 8443-8 Jumper from the Passenger Airbag Squib connector.
Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
Connect the Load Tool 8443-28 ORC Adaptor to the ORC connector.
Measure the resistance of the Passenger Squib 1 Line 1 circuit between the Passenger Airbag Squib connector and the ORC 8443-28 Adaptor cavity C2B-89.
Is the resistance below 1.0 ohm?
Yes
- Go to 4
No
- Repair the Passenger Squib 1 Line 1 circuit for an open.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.
4. CHECK PASSENGER SQUIB 1 LINE 2 CIRCUIT FOR AN OPEN
Measure the resistance of the Passenger Squib 1 Line 2 circuit between the Passenger Airbag Squib connector and the ORC 8443-28 Adaptor cavity C2B-90.
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 take the proper precautions can result in accidental airbag deployment and personal injury or death.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.
No
- Repair the Passenger Squib 1 Line 2 circuit for an open.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.