DTC Troubleshooting: B1077DTC B1077: Windshield 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.
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 LOW or HIGH for 15 seconds or more, then turn the switch OFF.
Do the windshield wipers run?
YES - Go to step 4.
NO - Go to step 12.
4.
Check for DTCs with the HDS.
Is DTC B1077 indicated?
YES - Go to step 5.
NO - Intermittent failure. The windshield wiper system is OK at this time. Check for loose or poor connections.
5.
Turn the ignition switch to LOCK (0).
6.
Do the wiper motor test.
Wiper Motor Test Does the wiper motor run normally and does it pulse?
YES - Go to step 7.
NO - Replace the windshield wiper motor and recheck.
7.
Disconnect under-dash fuse/relay box connector F (34P) and the windshield wiper motor 5P connector.
8.
Check for continuity between windshield wiper motor 5P*1 (4P)*2 connector terminal No. 4*1 (No. 3)*2 and under-dash fuse/relay box connector F (34P) terminal No. 32.
Is there continuity?
YES - Go to step 9.
NO - Repair an open in the WHT wire.
9.
Check for continuity between windshield wiper motor 5P*1 (4P)*2 connector terminal No. 4*1 (No. 3)*2 and body ground.
Is there continuity?
YES - Repair a short in the WHT wire.
NO - Go to step 10.
10.
Turn the ignition switch to ON (II).
11.
Measure the voltage between windshield wiper motor 5P*1 (4P)*2 connector terminal No. 4*1 (No. 3)*2 and body ground.
Is there voltage?
YES - Repair a short to power in the WHT wire.
NO - Faulty MICU; replace the under-dash fuse/relay box.
12.
Turn the ignition switch to LOCK (0).
13.
Check the No. 38 (30 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 14.
NO - Replace the fuse and recheck the system.
14.
Do the wiper motor test.
Wiper Motor Test Does the wiper motor run normally?
YES - Go to step 15.
NO - Replace the windshield wiper motor and recheck.
15.
Reconnect the windshield wiper motor 5P*1 (4P)*2 connector.
16.
Measure the voltage between under-dash fuse/relay box connector F (34P) terminals No. 18 (LO) and No. 19 (HI) and body ground with the wiper switch in the corresponding position individually.
Is there battery voltage?
YES - Go to step 17.
NO - Faulty MICU; replace the under-dash fuse/relay box.
17.
Measure the voltage between windshield wiper motor 5P*1 (4P)*2 connector terminals No. 3*1 (No. 2)*2 (LO) and No. 5 (HI) and body ground with the wiper switch in the corresponding position individually.
Is there battery voltage?
YES - Go to step 18.
NO - Repair an open in the BLU (LO) or YEL (HI) wire.
18.
Measure the voltage between windshield wiper motor 5P*1 (4P)*2 connector terminal No. 2*1 (No. 1)*2 and body ground.
Is there less than 1 V?
YES - Faulty MICU; replace the under-dash fuse/relay box.
NO - Repair an open in the BLK wire or poor ground (G451).
