B1142
B1142 - PASSENGER AIRBAG SQUIB CIRCUIT RESISTANCE TOO LOW
- When Monitored: With the ignition on.The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Airbag Squib circuits.
- Set Condition:The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Airbag Squib circuits. The ORC will set this DTC if it detects low resistance between the Passenger Airbag Squib circuits.
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.
SELECT ACTIVE or STORED DTC:
ACTIVE DTC
- Go To 2
STORED DTC
- Go To 4
2. CHECK FOR SHORTED 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.
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.
Disconnect the Passenger Airbag Squib connector.
NOTE: Check connectors - Clean and repair as necessary.
Connect the 8443 Load Tool and appropriate 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: DRIVER SQUIB 1 CIRCUIT SHORT?
Yes
- Go To 3
No
- Replace the Passenger Airbag
- Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test
3. CHECK PASSENGER AIRBAG SQUIB LINE 2 CIRCUIT FOR A SHORT TO PASSENGER AIRBAG SQUIB LINE 1 CIRCUIT
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance between the Passenger Airbag Squib Line 2 circuit and the Passenger Airbag Squib Line 1 circuit.
Is the resistance below 1.0 ohm?
Yes
- Repair the Passenger Airbag Squib Line 2 circuit for a short to the Passenger Airbag Squib Line 1 circuit.
- Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test
No
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 AIRBAG VERIFICATION TEST. Airbag System Verification Test
4. CHECKING STORED OR INTERMITTENT CODES
NOTE: Diagnose and repair all active codes before diagnosing stored codes.
With the scan tool, record and erase all Airbag System Module DTCs.
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.
Reconnect all disconnected components and harness connectors.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, monitor for active codes while performing the following:
- Wiggle the wiring harness and connectors of the related airbag circuit.
- Rotate the steering wheel from stop to stop.
- Continue the test until either a code becomes active or the problem area is isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question / causing the intermittent condition.
Are any ACTIVE DTCs present?
Yes
- Go To,1
No
- No problem found at this time. Erase all codes before returning the vehicle to the customer.