DTC 31-1x: Open in the Driver's Side Airbag Inflator; DTC 31-2x: Increased Resistance in the Driver's Side Airbag Inflator

NOTE: 

• Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed .
• Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and 12 Volt Battery Terminal Disconnection and Reconnection .
• Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.

• 1. Problem verification:

  1. Clear the DTCs with the HDS .

  2. Turn the vehicle to the ON mode, then wait for 10 seconds.

  3. Check for DTCs with the HDS .

  Is DTC 31-1x or 31-2x indicated?

  YES 

  The failure is duplicated. Go to step 2.

  NO 

  Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.

• 2. Driver's side airbag inflator check:

  1. Turn the vehicle to the OFF (LOCK) mode.

  2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

  3. Disconnect the following connector.

  Driver's side airbag inflator 2P connector (on the floor wire harness)

  4. Connect terminals A and B with a jumper wire.

  Terminal A	Driver's side airbag inflator 2P connector No. 1 (on the floor wire harness)
  Terminal B	Driver's side airbag inflator 2P connector No. 2 (on the floor wire harness)

  Courtesy of HONDA, U.S.A., INC.

  5. Reconnect the negative cable to the 12 volt battery.

  6. Clear the DTCs with the HDS .

  7. Turn the vehicle to the ON mode, then wait for 10 seconds.

  8. Check for DTCs with the HDS .

  DTC Description	DTC

  Is DTC 31-1x or 31-2x indicated?

  YES 

  Go to step 3.

  NO 

  Faulty driver's side airbag inflator; replace the driver's side airbag , then clear the DTC.

• 3. Open wire check (LSA+, LSA- lines):

  1. Turn the vehicle to the OFF (LOCK) mode.

  2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

  3. Remove the jumper wire from the driver's side airbag inflator 2P connector on the floor wire harness.

  4. Disconnect the following connector.

  SRS unit connector B (39P)

  5. Connect terminals A and B with a jumper wire.

  Terminal A	SRS unit connector B (39P) No. 5
  Terminal B	SRS unit connector B (39P) No. 6

  6. Measure the resistance between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	Driver's side airbag inflator 2P connector (on the floor wire harness): disconnected
  	SRS unit connector B (39P): disconnected
  	SRS unit connector B (39P) terminals No. 5 and No. 6: jumped
  Test point 1	Driver's side airbag inflator 2P connector No. 1 (on the floor wire harness)
  Test point 2	Driver's side airbag inflator 2P connector No. 2 (on the floor wire harness)

  Courtesy of HONDA, U.S.A., INC.

  Is there 1.0 Ω or less?

  YES 

  The LSA+ and LSA- wires are OK. Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit . If the DTC does not clear, replace the floor wire harness.

  NO 

  Open in the floor wire harness; replace the floor wire harness, then clear the DTC.