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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Operate the rear window wiper for at least 15 seconds, then turn the rear window wiper switch OFF.
Check for DTCs with the HDS.
Is DTC B1028 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
Do the rear window wiper motor test (see WIPER MOTOR TEST ).
Is the rear window wiper motor OK?

YES -Go to step 6.

NO -Replace the rear window wiper motor (see REAR WINDOW WIPER MOTOR REPLACEMENT ).
Check the No. B16 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?

YES -Go to step 7.

NO -Replace the fuse, and recheck the system.
Disconnect the rear window wiper motor 4P connector.
Turn the ignition switch to ON (II).
Measure the voltage between rear window wiper motor 4P connector terminal No. 2 and body ground.

Fig 1: Measuring Voltage Between Rear Window Wiper Motor 4P Connector Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 10.

NO -Repair an open or high resistance in the wire between the under-dash fuse/relay box and the rear window wiper motor.
Check for continuity between rear window wiper motor 4P connector terminal No. 3 and body ground.

Fig 2: Checking Continuity Between Rear Window Wiper Motor 4P Connector Terminal No. 3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 11.

NO -Repair an open or high resistance in the wire between rear window wiper motor 4P connector terminal No. 3 and body ground (G801).
Disconnect the under-dash fuse/relay box connector D (49P).
Measure the voltage between rear window wiper motor 4P connector terminal No. 4 and body ground.

Fig 3: Measuring Voltage Between Rear Window Wiper Motor 4P Connector Terminal No. 4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Repair a short to power in the wire between the rear window wiper motor and the under-dash fuse/relay box.

NO -Go to step 13.
Check for continuity between rear window wiper motor 4P connector terminal No. 4 and body ground.

Fig 4: Checking Continuity Between Rear Window Wiper Motor 4P Connector Terminal No. 4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to ground in the wire between the rear window wiper motor and the under-dash fuse/relay box.

NO -Go to step 14.
Check for continuity between under-dash fuse/relay box connector D (49P) terminal No. 10 and rear window wiper motor 4P connector terminal No. 4.

Fig 5: Checking Continuity Between Under-Dash Fuse/Relay Box Connector D (49P) Terminal No. 10 And Rear Window Wiper Motor 4P Connector Terminal No. 4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Faulty MICU; replace the under-dash fuse/relay box.
- USA models (see REMOVAL AND INSTALLATION )
- Canada models (see CANADA MODELS )
NO -Repair an open or high resistance in the wire between the rear window wiper motor and the under-dash fuse/relay box.