DTC B0050-13: Open or Increased Resistance in the Driver's Seat Belt Buckle Switch (2018-19)

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 - Refer to: SRS Component Replacement/Inspection After Deployment .
• Review SRS Precautions and Procedures .
• Review General Troubleshooting Information
• Review information pertaining to 12 Volt Battery Terminal Disconnection and Reconnection

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
   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. SRS unit check

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

   - 2. Connect terminals A and B with a jumper wire without disconnecting the SRS unit connector B (39P).

   Terminal A	SRS unit connector B (39P) No. 29 - Refer to: SRS Unit Connector for Inputs and Outputs
   Terminal B	Body ground

   - 3. Clear the DTCs with the HDS.

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

   - 5. Check for DTCs with the HDS.

   DTC Description
   B0050-11 Short or decreased resistance in the left front seat belt buckle switch

   Is DTC B0050-11 indicated?

   YES 

   Go to step 3.

   NO 

   Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit - Refer to: SRS Unit Removal and Installation . If the DTC does not clear, replace the right side wire harness.

3. Open wire check (FLBC line)

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

   - 2. Remove the jumper wire from SRS unit connector B (39P).

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

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

   - 4. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Driver's seat belt buckle switch 2P connector (on the driver's seat wire harness): disconnected
   Test point 1	Driver's seat belt buckle switch 2P connector (female terminals) No. 1 (on the driver's seat wire harness):
   Test point 2	Body ground

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

   Is there 10 V or more?

   YES 

   The FLBC wire is OK. Go to step 4.

   NO 

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

4. Open wire check (GND line)

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

   - 2. 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
   Test point 1	Driver's seat belt buckle switch 2P connector (female terminals) 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 wire is OK. Faulty driver's seat belt buckle switch; replace the driver's seat belt buckle assembly , then clear the DTC.

   NO 

   Open in the right side wire harness; check for a poor ground at G501. If the ground is OK, replace the right side wire harness, then clear the DTC.