DTC Troubleshooting: B1077
DTC B1077: Windshield wiper motor (Park) signal error
DTC Description |
DTC |
B1077 Windshield wiper motor (Park) signal error |
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1. |
Determine possible failure area (windshield wiper motor and its drive circuit, FR WIPER AS line):
Determine possible failure area (windshield wiper motor and its drive circuit, FR WIPER AS line)
?1. |
Turn the vehicle to the ON mode. |
?2. |
Clear the DTCs with the HDS.
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?3. |
Turn the vehicle to the OFF (LOCK) mode and then the ON mode. |
?4. |
Turn the windshield wiper switch to LOW or HIGH for 15 seconds or more, then turn the switch OFF. | |
Does the wiper motor work?
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Without keyless access system: Go to step 5. |
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With keyless access system: Go to step 11. |
2. |
Problem verification (DTC):
Problem verification (DTC)
?1. |
Check for DTCs with the HDS.
DTC Description |
DTC |
B1077 Windshield wiper motor (Park) signal error |
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Is DTC B1077 indicated?
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Intermittent failure, the system is OK at this time.? |
3. |
Windshield wiper motor check (AS signal):
Windshield wiper motor check (AS signal)
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
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Does the wiper motor run and does it pulse normally?
4. |
Open or shorted wire check (FR WIPER AS line):
Open or shorted wire check (FR WIPER AS line)
?1. |
Disconnect the following connectors.
Windshield wiper motor 4P connector |
Under-dash fuse/relay box connector Q (40P) | |
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?2. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor 4P connector: disconnected Under-dash fuse/relay box connector Q (40P): disconnected |
Test point 1 |
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Test point 2 |
Body ground | |
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Is there continuity?
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Repair a short to ground in the wire.? |
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Repair an open or high resistance in the wire.? |
5. |
Fuse check:
Fuse check
?1. |
Check the following fuse.
Fuse |
No. D15 (30 A) |
Location |
Auxiliary under-dash fuse box | |
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Is the fuse OK?
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Replace the fuse. If the fuse blows again, repair the short to ground in the No. D15 (30 A) fuse circuit.? |
6. |
Windshield wiper intermittent relay check:
Windshield wiper intermittent relay check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Remove the windshield wiper intermittent relay from the auxiliary under-hood relay box B, and test it. | |
Is the relay OK?
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Replace the windshield wiper intermittent relay, then recheck.? |
7. |
Windshield wiper high/low relay check:
Windshield wiper high/low relay check
?1. |
Remove the windshield wiper high/low relay from the auxiliary under-hood relay box B, and test it. | |
Is the relay OK?
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Replace the windshield wiper high/low relay, then recheck.? |
8. |
Open wire check (IG1 FR WIPER lines):
Open wire check (IG1 FR WIPER lines)
?1. |
Turn the vehicle to the ON mode. |
?2. |
Measure the voltage between test points 1 and 2 individually.
Test condition |
Vehicle ON mode Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected |
Test point 1 |
Windshield wiper intermittent relay (5P) No. 8 |
Test point 2 |
Body ground | |
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Test point 1 |
Windshield wiper intermittent relay (5P) No. 17 |
Test point 2 |
Body ground | |
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Test point 1 |
Windshield wiper high/low relay (5P) No. 9 |
Test point 2 |
Body ground | |
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Is there battery voltage?
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The IG1 FR WIPER wires are OK. Go to step 9. |
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Repair an open or high resistance in the wire.? |
9. |
Open wire check (FR WIPER HI/LO RLY COM line):
Open wire check (FR WIPER HI/LO RLY COM line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle ON mode Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected |
Test point 1 |
Windshield wiper intermittent relay (5P) No. 7 |
Test point 2 |
Windshield wiper high/low relay (5P) No. 1 | |
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Is there continuity?
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The FR WIPER HI/LO RLY COM wire is OK. Go to step 10. |
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Repair an open or high resistance in the wire.? |
10. |
Open wire check (GND line):
Open wire check (GND line)
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected |
Test point 1 |
Windshield wiper intermittent relay (5P) No. 18 |
Test point 2 |
Body ground | |
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Is there continuity?
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GND wire is OK. Go to step 19. |
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Repair an open or high resistance in the ground wire or poor ground (G301).? |
11. |
Fuse check:
Fuse check
?1. |
Check the following fuses.
Fuse |
No. B5 (30 A) |
Location |
Under-hood fuse/relay box | |
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Fuse |
No. C40 (10 A) |
Location |
Under-dash fuse/relay box | |
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Is each fuse OK?
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Replace the fuse. If the fuse blows again, repair the short to ground in the No. B5 (30 A) and/or No. C40 (10 A) fuse circuit(s).? |
12. |
Windshield wiper motor relay check:
Windshield wiper motor relay check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Remove the windshield wiper motor relay from the auxiliary under-hood relay box B, and test it. | |
Is the relay OK?
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Replace the windshield wiper motor relay, then recheck.? |
13. |
Open wire check (+B WIPER line):
Open wire check (+B WIPER line)
?1. |
Measure the voltage between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected |
Test point 1 |
Windshield wiper motor relay (4P) No. 5 |
Test point 2 |
Body ground | |
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Is there battery voltage?
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The +B WIPER wire is OK. Go to step 14. |
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Repair an open or high resistance in the wire.? |
14. |
Open wire check (IG1 RR WIPER line):
Open wire check (IG1 RR WIPER line)
?1. |
Turn the vehicle to the ON mode. |
?2. |
Measure the voltage between test points 1 and 2.
Test condition |
Vehicle ON mode Windshield wiper motor relay (4P): disconnected |
Test point 1 |
Windshield wiper motor relay (4P) No. 15 |
Test point 2 |
Body ground | |
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Is there battery voltage?
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The IG1 RR WIPER wire is OK. Go to step 15. |
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Repair an open or high resistance in the wire.? |
15. |
Windshield wiper intermittent relay check:
Windshield wiper intermittent relay check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Remove the windshield wiper intermittent relay from the auxiliary under-hood relay box B, and test it. | |
Is the relay OK?
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Replace the windshield wiper intermittent relay, then recheck.? |
16. |
Windshield wiper high/low relay check:
Windshield wiper high/low relay check
?1. |
Remove the windshield wiper high/low relay from the auxiliary under-hood relay box B, and test it. | |
Is the relay OK?
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Replace the windshield wiper high/low relay, then recheck.? |
17. |
Open wire check (FR WIPER MAIN RLY OUT lines):
Open wire check (FR WIPER MAIN RLY OUT lines)
?1. |
Check for continuity between test points 1 and 2 individually.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected |
Test point 1 |
Windshield wiper motor relay (4P) No. 6 |
Test point 2 |
Windshield wiper intermittent relay (5P) No. 8 | |
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Test point 1 |
Windshield wiper motor relay (4P) No. 6 |
Test point 2 |
Windshield wiper intermittent relay (5P) No. 17 | |
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Test point 1 |
Windshield wiper motor relay (4P) No. 6 |
Test point 2 |
Windshield wiper high/low relay (5P) No. 9 | |
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Is there continuity?
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The FR WIPER MAIN RLY OUT wires are OK. Go to step 18. |
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Repair an open or high resistance in the wire.? |
18. |
Open wire check (GND line):
Open wire check (GND line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected |
Test point 1 |
Windshield wiper intermittent relay (5P) No. 18 |
Test point 2 |
Body ground | |
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Is there continuity?
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GND wire is OK. Go to step 19. |
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Repair an open or high resistance in the ground wire or poor ground (G301).? |
19. |
Open wire check (FR WIPER INT RLY CL- line):
Open wire check (FR WIPER INT RLY CL- line)
?1. |
Disconnect the following connector.
Under-dash fuse/relay box connector Q (40P) | |
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?2. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected* Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected Under-dash fuse/relay box connector Q (40P): disconnected |
Test point 1 |
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Test point 2 |
Windshield wiper intermittent relay (5P) No. 19 | |
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Is there continuity?
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The FR WIPER INT RLY CL- wire is OK. Go to step 20. |
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Repair an open or high resistance in the wire.? |
20. |
Open wire check (WIPER HI/LO RLY CL- line):
Open wire check (WIPER HI/LO RLY CL- line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected* Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected Under-dash fuse/relay box connector Q (40P): disconnected |
Test point 1 |
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Test point 2 |
Windshield wiper high/low relay (5P) No. 11 | |
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Is there continuity?
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The WIPER HI/LO RLY CL- wire is OK. Go to step 21. |
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Repair an open or high resistance in the wire.? |
21. |
Open wire check (FR WIPER HI line):
Open wire check (FR WIPER HI line)
?1. |
Disconnect the following connector.
Windshield wiper motor 4P connector | |
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?2. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected* Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected Under-dash fuse/relay box connector Q (40P): disconnected Windshield wiper motor 4P connector: disconnected |
Test point 1 |
Windshield wiper high/low relay (5P) No. 10 |
Test point 2 |
Windshield wiper motor 4P connector No. 4 | |
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Is there continuity?
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The FR WIPER HI wire is OK. Go to step 22. |
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Repair an open or high resistance in the wire.? |
22. |
Open wire check (FR WIPER LO line):
Open wire check (FR WIPER LO line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode Windshield wiper motor relay (4P): disconnected* Windshield wiper intermittent relay (5P): disconnected Windshield wiper high/low relay (5P): disconnected Under-dash fuse/relay box connector Q (40P): disconnected Windshield wiper motor 4P connector: disconnected |
Test point 1 |
Windshield wiper high/low relay (5P) No. 2 |
Test point 2 |
Windshield wiper motor 4P connector No. 2 | |
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Is there continuity?
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The FR WIPER LO wire is OK. Go to step 23. |
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Repair an open or high resistance in the wire.? |
23. |
Windshield wiper motor check:
Windshield wiper motor check
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Does the wiper motor run and does it pulse normally?
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