DTC B0050-13 (2016)

DTC B0050-13  : Open or Increased Resistance in the Driver's Seat Belt Buckle Switch

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 Battery Terminal Disconnection and Reconnection. - Refer to: Battery Terminal Disconnection and Reconnection (2016) .
• 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.

DTC (SRS)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   - 2. Turn the vehicle to the ON mode, then wait for 10 seconds. Buckle and unbuckle the driver's seat belt several times.

   - 3. Check for DTCs with the HDS.

   DTC Description	DTC
   B0050-13 Open or increased resistance in the driver's seat belt buckle switch

   Is DTC B0050-13 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 seat belt buckle switch check

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

   - 2. Disconnect the driver's seat belt buckle switch 2P or 4P connector (A) on the driver's seat wire harness.

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

   - 3. Without ACC: Connect terminals A and B with a jumper wire.

   Terminal A	Driver's seat belt buckle switch 2P connector No. 1 (on the driver's seat wire harness)
   Terminal B	Driver's seat belt buckle switch 2P connector No. 2 (on the driver's seat wire harness)

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

   - 4. With ACC: Connect terminals A and B with a jumper wire.

   Terminal A	Driver's seat belt buckle switch 4P connector No. 1 (on the driver's seat wire harness)
   Terminal B	Driver's seat belt buckle switch 4P connector No. 4 (on the driver's seat wire harness)

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

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

   - 6. Check for DTCs with the HDS.

   DTC Description	DTC
   B0050-11 Short or decreased resistance in the driver's seat belt buckle switch

   Is DTC B0050-11 indicated?

   YES 

   Open in the driver's seat belt buckle switch; replace the driver's seat belt buckle assembly , then clear the DTC.

   NO (with ACC)

   Go to step 5.

   NO (without ACC)

   Go to step 3.

3. Open wire check (without ACC) (FLBC/TENSION REDUCER + line)

   -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 seat belt buckle switch 2P connector on the driver's seat wire harness.

   - 4. Disconnect the following connector.

   SRS unit connector B (39P)

   - 5. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's seat belt buckle switch 2P connector (on the driver's seat wire harness): disconnected
   	SRS unit connector B (39P): disconnected
   Test point 1	Driver's seat belt buckle switch 2P connector No. 1 (on the driver's seat wire harness)
   Test point 2	SRS unit connector B (39P) No. 18 - Refer to: SRS Unit Connector for Inputs and Outputs (2016),

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

   Is there 1.0 Ω or less?

   YES 

   The FLBC/TENSION REDUCER + wire is OK. Go to step 4.

   NO 

   Open in the driver's seat wire harness or the floor wire harness; replace the faulty harness, then clear the DTC.

4. Open wire check (without ACC) (GND/SGND line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's seat belt buckle switch 2P connector (on the driver's seat wire harness): disconnected
   	SRS unit connector B (39P): disconnected
   Test point 1	Driver's seat belt buckle switch 2P connector No. 2 (on the driver's seat wire harness)
   Test point 2	Body ground

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

   Is there 1.0 Ω or less?

   YES 

   The GND/SGND wire is 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 - Refer to: SRS Unit Removal and Installation . If the DTC does not clear, replace the driver's seat wire harness or the floor wire harness.

   NO 

   Open in the driver's seat wire harness or the floor wire harness; check for a poor ground at G604. If the ground is OK, replace the faulty harness, then clear the DTC.

5. Open wire check (with ACC) (FLBC/TENSION REDUCER + line)

   -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 seat belt buckle switch 4P connector on the driver's seat wire harness.

   - 4. Disconnect the following connector.

   SRS unit connector B (39P)

   - 5. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's seat belt buckle switch 4P connector (on the driver's seat wire harness): disconnected
   	SRS unit connector B (39P): disconnected
   Test point 1	Driver's seat belt buckle switch 4P connector No. 1 (on the driver's seat wire harness)
   Test point 2	SRS unit connector B (39P) No. 18 - Refer to: SRS Unit Connector for Inputs and Outputs (2016)

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

   Is there 1.0 Ω or less?

   YES 

   The FLBC/TENSION REDUCER + wire is OK. Go to step 6.

   NO 

   Open in the driver's seat wire harness or the floor wire harness; replace the faulty harness, then clear the DTC.

6. Open wire check (with ACC) (GND/SGND line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's seat belt buckle switch 4P connector (on the driver's seat wire harness): disconnected
   	SRS unit connector B (39P): disconnected
   Test point 1	Driver's seat belt buckle switch 4P connector No. 4 (on the driver's seat wire harness)
   Test point 2	Body ground

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

   Is there 1.0 Ω or less?

   YES 

   The GND/SGND wire is 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 - Refer to: SRS Unit Removal and Installation . If the DTC does not clear, replace the driver's seat wire harness or the floor wire harness.

   NO 

   Open in the driver's seat wire harness or the floor wire harness; check for a poor ground at G604. If the ground is OK, replace the faulty harness, then clear the DTC.