DTC B2850-11

DTC B2850-11  : Driver's E-Pretensioner Spool Sensor Power Circuit Short

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.
• When you replace the E-pretensioner unit, check the HDS and replace the indicated side of E-pretensioner unit on the HDS.

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
   B2850-11 Driver's E-Pretensioner Spool Sensor Power Circuit Short

   Is DTC B2850-11 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 (L SPOOL PWR line) 1

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

   - 2. Check for continuity between test points 1 and 2 without disconnecting the driver's E-pretensioner spool sensor 3P connector.

   Test condition	Vehicle OFF (LOCK) mode
   Test circuit	L SPOOL PWR
   Test point 1	Driver's E-pretensioner spool sensor 3P connector No. 3 (GRY)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Go to step 3.

   NO 

   Go to step 5.

3. Shorted wire check (L SPOOL PWR line) 2

   - 1. Disconnect the following connector.

   Driver's E-pretensioner spool sensor 3P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner spool sensor 3P connector: disconnected
   Test circuit	L SPOOL PWR
   Test point 1	Driver's E-pretensioner spool sensor 3P connector No. 3 (GRY)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Go to step 4.

   NO 

   Faulty driver's E-pretensioner spool sensor; replace the driver's seat belt .

4. Shorted wire check (L SPOOL PWR line) 3

   - 1. Disconnect the following connector.

   Driver's E-pretensioner unit 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner spool sensor 3P connector: disconnected
   	Driver's E-pretensioner unit 16P connector: disconnected
   Test circuit	L SPOOL PWR
   Test point 1	Driver's E-pretensioner spool sensor 3P connector No. 3 (YEL)
   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 driver's E-pretensioner unit and the driver's E-pretensioner spool sensor.

   NO 

   The L SPOOL PWR wire is OK. Replace the E-pretensioner unit .

5. Shorted wire check (L SPOOL PWR line to power)

   - 1. Disconnect the following connector.

   Driver's E-pretensioner unit 16P connector

   - 2. Measure the voltage between test points 1 and 2 without disconnecting the driver's E-pretensioner spool sensor 3P connector.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner unit 16P connector: disconnected
   Test circuit	L SPOOL PWR

   Test point 1	Driver's E-pretensioner spool sensor 3P connector No. 3 (GRY)
   Test point 2	Body ground

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

   Is there 1.5 V or more?

   YES 

   Repair a short to power in the wire between the driver's E-pretensioner unit and the driver's E-pretensioner spool sensor.

   NO 

   The L SPOOL PWR wire is OK. Replace the E-pretensioner unit .