B1028
DTC B1028: Rear Window Wiper Motor (Park) Signal ErrorNOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Turn the rear wiper switch to ON for 15 seconds or more, then turn the switch OFF.
Does the rear window wiper motor run?
YES - Go to step 4.
NO - Go to step 11.
4. Check for DTCs with the HDS.
Is DTC B1028 indicated?
YES - Go to step 5.
NO - Intermittent failure. The rear window wiper (Park) signal is OK at this time. Check for loose or poor connections.
5. Do the rear wiper motor test.
Does the rear wiper motor run and does it pulse normally?
YES - Go to step 6.
NO - Replace the rear wiper motor and recheck.
6. Disconnect the under-dash fuse/relay box connector S (20P) and rear wiper motor 4P connector.
7. Check for continuity between the No. 2 terminal of the rear wiper motor 4P connector and No. 2 terminal of the under-dash fuse/relay box connector S (20P).
Is there continuity?
YES - Go to step 8.
NO - Repair an open in the PUR wire.
8. Check for continuity between the rear window wiper motor 4P connector No. 2 terminal and body ground.
Is there continuity?
YES - Repair a short to ground in the PUR wire.
NO - Go to step 9.
9. Turn the ignition switch ON (II).
10. Measure the voltage between the rear window wiper motor 4P connector No. 2 terminal and body ground.
Is there voltage?
YES - Repair a short to power in the PUR wire.
NO - Faulty MICU; replace the under-dash fuse/relay box.
11. Turn the ignition switch OFF.
12. Check the No. 8 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 13.
NO - Replace the fuse and recheck the system.
13. Do the wiper motor test.
Does the wiper motor run normally?
YES - Go to step 14.
NO - Replace the windshield wiper motor and recheck.
14. Do the rear window wiper relay test.
Is the relay OK?
YES - Go to step 15.
NO - Replace the rear window wiper relay and recheck.
15. Turn the ignition switch ON (II).
16. Measure the voltage between the No. 7 terminal of the under-hood fuse/relay box connector D (8P) and body ground.
Is there voltage?
YES - Go to step 17.
NO - Repair an open in the PNK wire or blown No. 8 fuse in the under-dash fuse/relay box.
17. Measure the voltage between the NO. 15 terminal of the under-hood fuse/relay box connector F (20P) and body ground.
Is there voltage?
YES - Go to step 18.
NO - Repair an open in the PNK wire.
18. Turn the ignition switch OFF.
19. Disconnect the under-hood fuse/relay box connector E (10P) and rear wiper motor 4P connector.
20. Check for continuity between the No. 1 terminal of the rear window wiper motor 4P connector and No. 2 terminal of the under-hood fuse/relay box connector E (10P).
Is there continuity?
YES - Go to step 21.
NO - Repair open in the GRN wire.
21. Check for continuity between the rear window wiper motor 4P connector No. 3 terminal and body ground.
Is there continuity?
YES - Go to step 22.
NO - Repair open in the BLK wire or poor ground (G602).
22. Disconnect the under-hood fuse/relay box connector F (20P) and under-hood fuse/relay box connector S (20P).
23. Check for continuity between the No. 8 terminal of the under-hood fuse/relay box connector F (20P) and No. 3 terminal of the under-dash fuse/relay box connector S (20P).
Is there continuity?
YES - Repair open in the RED wire.
NO - Faulty MICU; replace the under-dash fuse/relay box.