DTC B20A1

DTC B20A1  : HSW Current Abnormal

DTC (Gauge Control Module)

NOTE: 

• SRS components are located in this area. Review the SRS component locations , and precautions and procedures before doing repairs or servicing.
• After testing, clear the SRS control unit DTCs.
• If DTC U0299 is indicated, troubleshoot the DTC first.

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -3. Press the heated steering wheel button.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B20A1 HSW Current Abnormal

   Is DTC B20A1 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Determine possible failure area (steering heater, others)

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

   -2. Do the battery terminal disconnection procedure .

   -3. Remove the steering wheel , and the steering wheel rear cover.

   -4. Install the steering wheel without the driver's airbag and the steering wheel rear cover.

   -5. Do the battery terminal reconnection procedure .

   -6. Turn the steering wheel at 180 deg..

   -7. Disconnect the following connector.

   Steering heater 4P connector

   -8. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode Heated steering wheel switch ON Steering heater 4P connector: disconnected
   Test circuit	HEATER
   Test point 1	Steering heater 4P connector No. 2 (RED)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Open wire check (HEATER line)

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

   Test condition	Vehicle ON mode Heated steering wheel switch ON Steering heater 4P connector: disconnected
   Test circuit	HEATER
   Test point 1	Heated steering wheel control unit 14P connector No. 1 (RED)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Repair an open or high resistance in the wire.

   NO 

   Replace the heated steering wheel control unit .

4. Steering heater check

   -1. Do the steering heater check .

   Is the steering heater OK?

   YES 

   Go to step 5.

   NO 

   Faulty steering heater, replace the steering wheel assembly .

5. Open wire check (PGND line)

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

   Test condition	Vehicle OFF (LOCK) mode Steering heater 4P connector: disconnected
   Test circuit	PGND
   Test point 1	Steering heater 4P connector No. 1 (BLK)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Replace the heated steering wheel control unit .

   NO 

   If the cable reel is OK, repair an open or high resistance in the ground wire or poor ground (G501).