DTC B2858-14

DTC B2858-14  : Driver's E-Pretensioner Motor Circuit Open or Short to Ground

NOTE: 

• Before doing this troubleshooting procedure, review General Troubleshooting Information .
• Before replacing the E-pretensioner unit, check the E-pretensioner unit software version with the HDS. If the software version is not the latest, update the E-pretensioner unit software , and retest.

DTC (E-pretensioner)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the ON mode.

   -3. Check for DTCs with the HDS.

   DTC Description	DTC
   B2858-14 Driver's E-Pretensioner Motor Circuit Open or Short to Ground

   Is DTC B2858-14 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

2. Determine possible failure area (E-PT L MTR+ line, E-PT L MTR- line)

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

   -2. Disconnect the following connector.

   Driver's E-pretensioner motor 2P connector

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Driver's E-pretensioner motor 2P connector: disconnected
   Test circuit	E-PT L MTR+
   Test point 1	Driver's E-pretensioner motor 2P connector No. 1 (LT BLU)
   Test point 2	Body ground

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

   Is there 0.2 V or less?

   YES 

   Go to step 5.

   NO 

   Go to step 3.

3. Open wire check (E-PT L MTR- line) 1

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

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner motor 2P connector: disconnected
   Test circuit	E-PT L MTR-
   Test point 1	Driver's E-pretensioner motor 2P connector No. 2 (LT GRN)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   The E-PT L MTR- wire is OK. Faulty driver's E-pretensioner motor; replace the driver's seat belt .

   NO 

   Go to step 4.

4. Open wire check (E-PT L MTR- line) 2

   -1. Disconnect the following connector.

   E-pretensioner unit connector A (16P)

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner motor 2P connector: disconnected
   	E-pretensioner unit connector A (16P): disconnected
   Test circuit	E-PT L MTR-
   Test point 1	Driver's E-pretensioner motor 2P connector No. 2 (LT GRN)
   Test point 2	E-pretensioner unit connector A (16P) No. 3 (LT GRN)

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

   Is there continuity?

   YES 

   The E-PT L MTR- wire is OK. Replace the E-pretensioner unit .

   NO 

   Repair an open in the wire between the E-pretensioner unit connector A (16P) of the E-pretensioner unit and the driver's E-pretensioner motor.

5. Shorted wire check (E-PT L MTR+ line)

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

   -2. Disconnect the following connector.

   E-pretensioner unit connector A (16P)

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner motor 2P connector: disconnected
   	E-pretensioner unit connector A (16P): disconnected
   Test circuit	E-PT L MTR+
   Test point 1	E-pretensioner unit connector A (16P) No. 2 (LT BLU)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to ground in the wire between the E-pretensioner unit connector A (16P) of the E-pretensioner unit and the driver's E-pretensioner motor.

   NO 

   Go to step 6.

6. Open wire check (E-PT L MTR+ line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner motor 2P connector: disconnected
   	E-pretensioner unit connector A (16P): disconnected
   Test circuit	E-PT L MTR+
   Test point 1	Driver's E-pretensioner motor 2P connector No. 1 (LT BLU)
   Test point 2	E-pretensioner unit connector A (16P) No. 2 (LT BLU)

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

   Is there continuity?

   YES 

   The E-PT L MTR+ wire is OK. Replace the E-pretensioner unit .

   NO 

   Repair an open in the wire between the E-pretensioner unit connector A (16P) of the E-pretensioner unit and the driver's E-pretensioner spool sensor.