B1284

DTC Troubleshooting: B1281, B1282, B1283, B1284

DTC B1281: Windshield Wiper Switch MIST Position Circuit Malfunction

DTC B1282: Windshield Wiper Switch INT Position Circuit Malfunction

DTC B1283: Windshield Wiper Switch LOW Position Circuit Malfunction

DTC B1284: Windshield Wiper Switch HIGH Position Circuit Malfunction

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Turn the wiper switch to the MIST, INT, LOW, HIGH, and OFF positions, and wait for 6 seconds or more.

4. Check for DTCs with the HDS.

Is DTC B1281, B1282, B1283, or B1284 indicated?
YES - Go to step 5.

NO - Intermittent failure, the wiper system is OK at this time. Check for loose or poor connections.


5. Select WIPERS from the BODY ELECTRICAL menu, and enter DATA LIST.

6. Check each wiper switch position value with the DATA LIST menu.

When the wiper switch is turned OFF





Are all data list values correct?
YES - Go to step 7.

NO - Go to step 10.


7. Turn the ignition switch to LOCK (0).

8. Disconnect under-dash fuse/relay box connector S (20P).

9. Check for continuity between under-dash fuse/relay box connector S (20P) terminals as shown:





Is there continuity?
YES - Repair a short between the wires.

NO - Faulty MICU; replace the under-dash fuse/relay box. Under-Dash Fuse/Relay Box Removal and Installation


10. Turn the ignition switch to LOCK (0).

11. Disconnect the 8P connector from the wiper switch.

12. Turn the ignition switch to ON (II).

13. Check each wiper switch position value with the DATA LIST menu.

When the wiper switch is turned OFF





Are all data list values correct?
YES - Replace the wiper/washer switch. Service and Repair

NO - Go to step 14.


14. Turn the ignition switch to LOCK (0).

15. Disconnect under-dash fuse/relay box connector S (20P).

16. Check for continuity between body ground and under-dash fuse/relay box connector S (20P) terminals No. 10, No. 15, and No. 20.

Is there continuity?
YES - Repair a short to ground in the wire.

NO - Go to step 17.






17. Check for continuity between under-dash fuse/relay box connector S (20P) terminal No. 4 and terminals No. 10, No. 15, and No. 20 individually.

Is there continuity?
YES - Repair a short between the wires.

NO - Faulty MICU; replace the under-dash fuse/relay box. Under-Dash Fuse/Relay Box Removal and Installation