Restraint System - SIR Light On, DTC B0014/B0021 Set
TECHNICALBulletin No.: 11-09-41-001
Date: March 10, 2011
Subject: SIR Light On, DTC B0014 and/or B0021 Set in Sensing and Diagnostics Module (SDM)
Models:
2010-2011 Chevrolet Equinox
2010-2011 GMC Terrain
Condition
Some customers may comment that the SIR light is on, or has been on recently.
When checking the vehicle for DTCs, the SDM may report any of the following codes: B0014 02, B0014 04, B0014 0D, B0014 0E, B0021 02, B0021 04, B0021 0D or B0021 0E.
This condition may be duplicated by moving the front seat forward and backward or by bouncing on the lower cushion on the affected side.
Cause
The codes can be set when the SDM senses a change in resistance in the circuit for the seat mounted side impact side airbag. The change in resistance can be small and it can be temporary, but the SDM can still sense the change and set a code. In this case, the airbags will work as intended in a crash but the system should be checked for the cause of the resistance change. The source of the issue can be at or in the connector that connects the airbag from the seat to the body harness. Connector X304 (B0014 LF Side Deployment Loop) is located under the driver seat cushion and connector X303 (B0021 RF Side Deployment Loop) is located under the passenger seat cushion.
Correction
Replace the driver and passenger seat back harness to seat cushion harness connectors with service kit, P/N 20968489. The two gray connector (Christmas tree style) retainers provided in the kit will not be used. The new connector will be secured to the seat using clip, P/N 19258316. Follow the steps below.
Important
DO NOT replace the sensing and diagnostic module (SDM), side sensors or air bag modules.
Important
Both driver and passenger seats must be repaired when this concern occurs even if only one DTC code is set. The service kit contains sufficient components to repair both seat connectors.
1. Disable the SIR system. Refer to SIR Disabling and Enabling in SI.
Note
Only use hand tools to remove the seat to floor mounting bolts. If there are any problems with bolt removal, refer to Corporate Bulletin Number 10-08-50-002.
2. Remove the seat to floor rear mounting bolts. Loosen the seat from the front hooks and tilt it back to expose the underside of the seat. Refer to Driver or Passenger Seat Replacement procedure in SI.
3. Disconnect the seat to body harness connector. Disconnect the seat airbag connector.
Important
Note the wire colors on the seat airbag harness and body harness. Ensure that the wire colors are matched when installing into the new connector.
4. Cut both wires from the body harness connector and seat airbag harness connector as close to the connector housing (1) as possible to minimize wire length loss. Slide the conduit away on the seat airbag harness and remove just enough tape on the body harness to access the wires to install the terminals and seals.
Important
Use caution when stripping insulation. Take care not to cut through the wire strands.
5. Slide the wire seals onto all four leads back enough to enable removal of the insulation. Install the blue seals (1) on the seat back harness and the white seals (2) on the seat cushion harness. Strip the insulation off all four leads 5 mm (3/16 in). Align the seals with the wire insulation.
6. On the seat back harness, position two FEMALE terminals onto the wires. Caution must be used not to position the wire too far forward as it may interfere with the mating portion of the terminal. Crimp the terminals on to the bare wire using the J- 38125-7 crimp tool, jaw E (1). Repeat the procedure using two MALE terminals on the seat cushion harness.
7. Position the wire seal to the terminal and crimp the seal and insulation using the J-38125-6 crimp tool, jaw 1 (1).
The completed terminal and seal should appear as shown above (seat back harness connector shown).
Note
Avoid getting solder on the terminal end or overheating the terminal.
Warning
DO NOT use soldering equipment that is battery or electric powered. These types of soldering irons can induce voltage into the circuit, which may cause inflator module deployment and/or damage to electrical components. Use only the EL-28125-5A Ultra Torch or another butane fueled soldering iron when working on SIR circuits.
8. Solder all four terminals at the wire crimp.
9. Slide the two body harness terminals through the opening of the orange connector position assurance (CPA) (1).
Important
Ensure that the appropriate wire colors match up (as noted in Step 4) when the connection is made between the seat airbag harness and body harness.
10. Slide all four terminals (2) into the appropriate connector body as shown above. Install the blue terminal position assurance (TPA) devices onto the connector ends.
11. Add NyoGel 760 Lubricant, P/N 12377900 (in Canada, use P/N 10953529) to the terminals on both sides of the connections.
12. Wrap anti-abrasion electrical tape around the two exposed wires on the body harness up to the back of the connector.
Obtain "*Woven Polyester (PET) Electrical Tape" (Special Order PN RZ97156A00) from Kent Automotive. Refer to Parts Information below.
Reinstall the conduit on the seat airbag harness.
13. Attach the connector to the bottom of the seat using clip, P/N 19258316.
14. Reinstall the seat. Refer to Driver or Passenger Seat Replacement procedure in SI.
15. Repeat the above procedure on the other seat.
16. Enable the SIR system. Refer to SIR Disabling and Enabling in SI.
17. Turn the ignition on and use the diagnostic tool to clear the SDM DTCs and verify that the issue has been corrected. If the code is still current, refer to the appropriate diagnostic procedure found in SI.
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Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
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