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DTC Troubleshooting: B1028

DTC B1028:
 Rear Wiper Auto Stop Switch Malfunction
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0) and then back to ON (II).
  1. Operate the rear window wiper for 15 seconds or more, then turn the rear window wiper switch OFF.
  1. 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.■
  1. Check the No. 16 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to Step 6 .
NO -
Replace the fuse and recheck the system.■
  1. Disconnect the rear window wiper motor 4P connector.
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between the rear window wiper motor 4P connector No. 1 terminal and body ground.
Is there battery voltage?
YES -
Go to Step 9 .
NO -
Repair an open in the wire between the under-dash fuse/relay box and rear window wiper motor.■

  1. Check for continuity between the rear window wiper motor 4P connector No. 4 terminal and body ground.
Is there continuity?
YES -
Go to Step 10 .
NO -
Repair an open in the wire between the No. 4 terminal of the rear window wiper motor 4P connector and body ground (G602) [G604].■
[ ]: LHD model
Is the rear window wiper motor OK?
YES -
Go to Step 11 .
NO -
Replace the rear window wiper motor.■
  1. Disconnect under-dash fuse/relay box connector C.

  1. Measure the voltage between the rear window wiper motor 4P connector No. 3 terminal and body ground.
Is there battery voltage?
YES -
Repair a short to power in the wire between the rear window wiper motor and under-dash fuse/relay box.■
NO -
Go to Step 13 .

  1. Check for continuity between the rear window wiper motor 4P connector No. 3 terminal and body ground.
Is there continuity?
YES -
Repair a short to ground in the wire between the rear window wiper motor and under-dash fuse/relay box.■
NO -
Go to Step 14 .

  1. Check for continuity between under-dash fuse/relay box connector C (49P) No. 29 terminal and the rear window wiper rear window wiper motor 4P connector No. 3 terminal.
    NOTE: The illustration shows the RHD model and the black portion shows the lock lever. The lock lever for LHD model is shown as the dashed lines.
Is there continuity?
YES -
NO -
Repair an open in the wire between the rear window wiper motor and under-dash fuse/relay box.■