DTC B2858-12

DTC B2858-12  : Driver's E-Pretensioner Motor Circuit Short to Power

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
   B2858-12 Driver's E-Pretensioner Motor Circuit Short to Power

   Is DTC B2858-12 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. Shorted wire check (E-PT L MTR+ line to power)

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

   -2. Disconnect the following connector.

   E-pretensioner unit connector A (16P)

   -3. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	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 3.9 V or more?

   YES 

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

   NO 

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