DTC B0050-13: Open Or Increased Resistance In The Driver's Seat Belt Buckle Switch (2014 2015)

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 and GENERAL TROUBLESHOOTING INFORMATION .
• 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.
• When troubleshooting, do not disconnect SRS unit connector B (39P) from the SRS unit.

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. SRS unit check

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

   - 2. Connect terminals A and B with a jumper wire.

   Terminal A	SRS UNIT CONNECTOR B (39P) NO. 18
   Terminal B	Body ground

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

   - 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	DTC
   B0050-1:1 Short or decreased resistance in the driver's seat belt buckle switch
   B0050-2B: Short to another wire harness in the driver's seat belt buckle switch

   Is DTC B0050-11 or B0050-2B 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, REPLACE THE SRS UNIT . 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 right side wire harness): disconnected
   Test circuit	FLBC
   Test point 1	Driver's seat belt buckle switch 2P connector No. 1 (on the right side 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 right side wire harness): disconnected
   Test circuit	GND
   Test point 1	Driver's seat belt buckle switch 2P connector No. 2 (BLK) (on the right side 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 G651. If the ground is OK, replace the right side wire harness, then clear the DTC.