DTC B1028

DTC B1028  : Rear wiper motor (park) signal error

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• Before troubleshooting, make sure the fuses and relays associated with the system is OK.

DTC (Body Control Module)

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. Turn the rear window wiper switch to INT for 15 seconds or more, then turn the switch OFF.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1028 Rear wiper motor (park) signal error

   Is DTC B1028 indicated?

   YES 

   Go to step 2.

   NO 

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

2. Open wire check (IG1_HAC line)

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

   -2. Disconnect the following connector.

   Rear window wiper motor 3P connector

   -3. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode Rear window wiper motor 3P connector: disconnected
   Test point 1	Rear window wiper motor 3P connector (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The IG1_HAC wire is OK. Go to step 3.

   NO 

   Repair an open or high resistance in the wire.

3. Rear window wiper motor check

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

   -2. Do the rear window wiper motor test .

   Does the wiper motor run and does it pulse normally?

   YES 

   Go to step 4.

   NO 

   Replace the rear window wiper motor .

4. Shorted wire check (RR_WIPER_MTR line to power)

   -1. Disconnect the following connector.

   Body control module connector A (14P)

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

   Test condition	Vehicle OFF (LOCK) mode Rear window wiper motor 3P connector: disconnected Body control module connector A (14P): disconnected
   Test point 1	Rear window wiper motor 3P connector (female terminals) No. 3:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Repair a short to power in the wire to power.

   NO 

   The RR_WIPER_MTR wire is not shorted to power. Go to step 5

5. Shorted wire check (RR_WIPER_MTR line)

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

   Test condition	Vehicle OFF (LOCK) mode Rear window wiper motor 3P connector: disconnected Body control module connector A (14P): disconnected
   Test point 1	Rear window wiper motor 3P connector (female terminals) No. 3:
   Test point 2	Body ground

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

   Is there 1.0 MΩ or more?

   YES 

   The RR_WIPER_MTR wire is not shorted. Go to step 6.

   NO 

   Repair a short to ground in the wire.

6. Open wire check (RR_WIPER_MTR line)

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

   Test condition	Vehicle OFF (LOCK) mode Rear window wiper motor 3P connector: disconnected Body control module connector A (14P): disconnected
   Test point 1	Body control module connector A (14P) No. 7
   Test point 2	Rear window wiper motor 3P connector (female terminals) No. 3:

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

   Is there 1.0 Ω or less?

   YES 

   The RR_WIPER_MTR wire is OK. Go to step 7.

   NO 

   Repair an open or high resistance in the wire.

7. Open wire check (GND line)

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

   Test condition	Vehicle OFF (LOCK) mode Rear window wiper motor 3P connector: disconnected Body control module connector A (14P): disconnected
   Test point 1	Body control module connector A (14P) No. 6
   Test point 2	Body ground

   Is there 1.0 Ω or less?

   YES 

   The GND wire is OK. Replace the body control module .

   NO 

   Repair an open or high resistance in the ground wire or poor ground (G401).