DTC Troubleshooting: B1077
DTC B1077: Windshield wiper motor (Park) signal error
DTC Description
DTC
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.

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.


?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?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Without keyless access system: Go to step 5.
     
NO
     
     
     
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
  

Is DTC B1077 indicated?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
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.

?2.
Do the windshield wiper motor test.

Does the wiper motor run and does it pulse normally?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
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)

?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
Under-dash fuse/relay box connector Q (40P) No. 39
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
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

Is the fuse OK?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
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?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
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?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
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

Test point 1
Windshield wiper intermittent relay (5P) No. 17
Test point 2
Body ground

Test point 1
Windshield wiper high/low relay (5P) No. 9
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The IG1 FR WIPER wires are OK. Go to step 9.
     
NO
     
     
     
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


Is there continuity?

     
YES
     
     
     
The FR WIPER HI/LO RLY COM wire is OK. Go to step 10.
     
NO
     
     
     
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


Is there continuity?

     
YES
     
     
     
GND wire is OK. Go to step 19.
     
NO
     
     
     
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

Fuse
No. C40 (10 A)
Location
Under-dash fuse/relay box

Is each fuse OK?

     
YES
     
     
     
Go to step 12.
     
NO
     
     
     
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?

     
YES
     
     
     
Go to step 13.
     
NO
     
     
     
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


Is there battery voltage?

     
YES
     
     
     
The +B WIPER wire is OK. Go to step 14.
     
NO
     
     
     
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


Is there battery voltage?

     
YES
     
     
     
The IG1 RR WIPER wire is OK. Go to step 15.
     
NO
     
     
     
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?

     
YES
     
     
     
Go to step 16.
     
NO
     
     
     
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?

     
YES
     
     
     
Go to step 17.
     
NO
     
     
     
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

Test point 1
Windshield wiper motor relay (4P) No. 6
Test point 2
Windshield wiper intermittent relay (5P) No. 17

Test point 1
Windshield wiper motor relay (4P) No. 6
Test point 2
Windshield wiper high/low relay (5P) No. 9


Is there continuity?

     
YES
     
     
     
The FR WIPER MAIN RLY OUT wires are OK. Go to step 18.
     
NO
     
     
     
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


Is there continuity?

     
YES
     
     
     
GND wire is OK. Go to step 19.
     
NO
     
     
     
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)

?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
Under-dash fuse/relay box connector Q (40P) No. 29
Test point 2
Windshield wiper intermittent relay (5P) No. 19
*: With keyless access system


Is there continuity?

     
YES
     
     
     
The FR WIPER INT RLY CL- wire is OK. Go to step 20.
     
NO
     
     
     
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
Under-dash fuse/relay box connector Q (40P) No. 24
Test point 2
Windshield wiper high/low relay (5P) No. 11
*: With keyless access system


Is there continuity?

     
YES
     
     
     
The WIPER HI/LO RLY CL- wire is OK. Go to step 21.
     
NO
     
     
     
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

?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
*: With keyless access system


Is there continuity?

     
YES
     
     
     
The FR WIPER HI wire is OK. Go to step 22.
     
NO
     
     
     
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
*: With keyless access system


Is there continuity?

     
YES
     
     
     
The FR WIPER LO wire is OK. Go to step 23.
     
NO
     
     
     
Repair an open or high resistance in the wire.?
23.
Windshield wiper motor check:

Windshield wiper motor check
?1.
Do the windshield wiper motor test.

Does the wiper motor run and does it pulse normally?

     
YES
     
     
     
     
NO