B0020-11
B0020-11-1ST ROW LEFT SEAT MOUNTED SIDE SQUIB 1 - CIRCUIT SHORT TO GROUND
Special Tools:
For a complete wiring diagram, consult the Wiring Information.
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 the 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 (8443A) in the tests below substitutes a suspect squib with a known good component.
- When Monitored:
With the ignition on.
- Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Left Seat Airbag circuits. If low resistance is detected in the Left Seat Airbag circuits the ORC will set this DTC.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.
1.
NOTE: The use of a approved special tool or Digital Multimeter such as a Fluke Meter that will not apply more than 20 milliamperes to a circuit are the only measurement tools to be used.
NOTE: Probing of the circuit cavities at the ORC Module C1-A, C1-B, or C2-A body harness connectors is only to be done with a approved test lead from the (10159) and use test lead 10159-6. Or a comparable test lead to prevent vehicle wiring harness connector damage during diagnostic procedures.
DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure that the battery is fully charged.
1. Turn the ignition on.
Select ACTIVE or STORED DTC:
ACTIVE DTC
- Go To 2
STORED DTC
- Go To 5
2. CHECK FOR SHORTED SQUIB CIRCUITS AT THE LEFT SEAT SQUIB 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 Left Seat Airbag harness connector.
WARNING: Do not place an intact undeployed 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 connectors - Clean and repair as necessary.
2. Connect the (8443A) and the (8443-8) to the Left Seat Airbag harness connector.If the vehicle is equipped with the standard key ignition, follow this ignition on warning.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
If the vehicle is equipped with the keyless ignition, follow this ignition on warning.
WARNING: Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. 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 ORC DTC.
Does the scan tool display: B0020-11-1ST ROW LEFT SEAT MOUNTED SIDE SQUIB 1 - CIRCUIT SHORT TO GROUND?
Yes
- Go To 3
No
- 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 Left Seat Airbag. Driver Air Bag - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. CHECK FOR SHORTED LEFT SEAT AIRBAG SQUIB CIRCUITS IN THE SEAT BACK
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 Seat Airbag C322 harness connector (under Left Seat).
NOTE: Check the connectors - Clean and repair as necessary.
2. Connect the (8443A) and the (8443-20) to the driver inline under seat harness connector.If the vehicle is equipped with the standard key ignition, follow this ignition on warning.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
If the vehicle is equipped with the keyless ignition, follow this ignition on warning.
WARNING: Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. 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 ORC DTC.
Does the scan tool display: B0020-11-1ST ROW LEFT SEAT MOUNTED SIDE SQUIB 1 - CIRCUIT SHORT TO GROUND?
Yes
- Go To 4
No
- 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.
- In accordance with Service Information repair or replace the Left Seat Airbag wiring harness (Side Airbag Jumper).
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
4. CHECK LEFT SEAT SQUIB CIRCUITS FOR A SHORT TO GROUND IN THE BODY HARNESS TO THE SEAT
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 (8443A) and the (8443-8) from the passenger under seat inline harness connector.
2. Disconnect the ORC harness connectors.
NOTE: Check connectors - Clean and repair as necessary.
3. Connect the test leads to the DVOM.
4. Measure the resistance of the (R5) Left Seat Squib 1 Line 2 circuit between the ORC module body harness connector terminal C1-B 93 and ground.
5. Measure the resistance of the (R7) Left Seat Squib 1 Line 2 circuit between the ORC module body harness connector terminal C1-B 94 and ground.
Is the resistance below 10K Ohms on either circuit?
Yes
- In accordance with Service Information repair or replace the Left Seat Airbag wiring harness.
- 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 take the proper precautions can result in accidental airbag deployment and serious or fatal injury.
- Replace the ORC. Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
5. CHECKING STORED OR INTERMITTENT CODES
NOTE: Diagnose and repair all active codes before diagnosing stored codes.
1. With the scan tool, record and erase all Airbag System Module DTCs.
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.
2. 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.
3. Reconnect all disconnected components and harness connectors.If the vehicle is equipped with the standard key ignition, follow this ignition on warning.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
If the vehicle is equipped with the keyless ignition, follow this ignition on warning.
WARNING: Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
4. With the scan tool, monitor for active codes while performing the following:WARNING: Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.
- Wiggle the wiring harness and connectors of the related airbag circuit.
- Continue the test until either a code becomes active or the problem area is isolated.
5. 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
- Follow the diagnostics of the indicated DTCs. Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- No problem found at this time. Erase all codes before returning the vehicle to the customer.