B1C27
B1C27-LEFT SIDE SEAT THORAX SQUIB 1 LOW
Special Tools:
For a complete wiring diagram, refer to the Wiring Information.
- 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.
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure that the battery is fully charged.
NOTE: The scan tool, SRS Load Tool Kit , and DVOM are required to perform the following test.
1. Turn the ignition on.
2. With the scan tool, read the active ORC DTC.
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 connector.
WARNING: To avoid serious or fatal injury, do not place an intact non-deployed Left Seat Squib 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.
2. Connect the SRS Load Tool Kit and SRS Load Tool Jumper to the Left Seat Airbag connector.
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.
3. With the scan tool, read the active ORC DTC.
Does the scan tool display: B1C27-LEFT SIDE SEAT THORAX SQUIB 1 LOW?
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.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag 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 C353 in-line connector (under Left Seat).
NOTE: Check connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit and SRS Load Tool Jumper to the C353 in-line connector (Body Side).
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.
3. With the scan tool, read the active ORC DTC.
Does the scan tool display: B1C27-LEFT SIDE SEAT THORAX SQUIB 1 LOW?
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 Squib 1 circuits. Left Seat Airbag circuits Squib 1 circuits shorted to ground between the C353 in-line connector (Side Airbag Jumper) and the Left Seat Airbag connector.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag 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 SRS Load Tool Kit and SRS Load Tool Jumper from the C353 in-line connector.
2. Disconnect the ORC connectors.
NOTE: Check connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adaptor to the ORC connectors.
4. Measure the resistance of the (R5) Left Seat Squib 1 Line 2 circuit between the SRS Load Tool Adaptor cavity 32-7 and ground.
5. Measure the resistance of the (R7) Left Seat Squib 1 Line 2 circuit between the SRS Load Tool Adaptor cavity 32-8 and ground.
Is the resistance below 10k Ohms on either circuit?
Yes
- In accordance with Service Information repair or replace the Left Seat Airbag Squib 1 circuits. Left Seat Airbag Squib 1 circuits shorted to ground between the C353 in-line connector (body side) and the ORC C2 (32 way) connector.
- Perform the AIRBAG SYSTEM 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 follow these instructions may result in possible serious or fatal injury.
- Replace the ORC.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag 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.
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.
4. With the scan tool, monitor for active codes while performing the following:
- 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
- Perform the appropriate diagnostic procedure. Testing and Inspection.
No
- No problem found at this time. Erase all codes before returning the vehicle to the customer.