DTC Troubleshooting: B1077 - Honda Accord CR/CT 2012-2017

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.	Clear the DTCs with the HDS.

?2.	Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.

?3.	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

Go to step 5.

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 ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.	Do the windshield wiper motor test.

Does the wiper motor run and does it pulse normally?


	YES

Go to step 4.


	NO

Replace the windshield wiper motor.?

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 E (36P)

?2.

Connect terminals A and B with a jumper wire.

Terminal A	Windshield wiper motor 4P connector No. 4 (WHT)
Terminal B	Body ground

?3.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode Windshield wiper motor 4P connector: disconnected Under-dash fuse/relay box connector E (36P): disconnected Windshield wiper motor 4P connector No. 4: jumped to body ground
Test circuit	FR WIPER AS
Test point 1	Under-dash fuse/relay box connector E (36P) No. 28 (WHT)
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 fuses.

Fuse	No. A12-8 (30 A)
Location	Under-hood fuse/relay box

Fuse	No. B12 (7.5 A)
Location	Under-dash fuse/relay box

Is each fuse OK?


	YES

Go to step 6.


	NO

Replace the fuse. If the fuse blows again, repair the short to ground in the No. A12-8 (30 A) and/or No. No. B12 (7.5 A) fuse circuit(s).?

6.

Open wire check (+B WIPER line):

Open wire check (+B WIPER line)

?1.

Disconnect the following connectors.

Relay circuit board connector B (14P)

?2.

Measure the voltage between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode Relay circuit board connector B (14P): disconnected
Test circuit	+B WIPER
Test point 1	Relay circuit board connector B (14P) No. 10 (RED)
Test point 2	Body ground

Is there battery voltage?


	YES

The +B WIPER wire is OK. Go to step 7.


	NO

Repair an open or high resistance in the wire.?

7.

Open wire check (IG1 WIPER line):

Open wire check (IG1 WIPER line)

?1.

Disconnect the following connector.

Relay circuit board connector C (10P)

?2.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	IG ON (II) or ON mode Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected
Test circuit	IG1 WIPER
Test point 1	Relay circuit board connector C (10P) No. 7 (PNK)
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 WIPER wire is OK. Go to step 8.


	NO

Repair an open or high resistance in the wire.?

8.

Open wire check (GND line) 1:

Open wire check (GND line) 1

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected
Test circuit	GND
Test point 1	Relay circuit board connector B (14P) No. 3 (BLK)
Test point 2	Body ground

Is there continuity?


	YES

GND wire is OK. Go to step 9.


	NO

Repair an open or high resistance in the ground wire or poor ground (G301).?

9.

Relay circuit board check:

Relay circuit board check

?1.	Test the relay circuit board.

Is the relay circuit board OK?


	YES

Go to step 10.


	NO

Replace the relay circuit board.?

10.

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 E (36P)

?2.

Connect terminals A and B with a jumper wire.

Terminal A	Relay circuit board connector B (14P) No. 12 (PUR)
Terminal B	Body ground

?3.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode Under-dash fuse/relay box connector E (36P): disconnected Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected Relay circuit board connector B (14P) No. 12: jumped to body ground
Test circuit	FR WIPER INT RLY CL-
Test point 1	Under-dash fuse/relay box connector E (36P) No. 22 (PUR)
Test point 2	Body ground

Is there continuity?


	YES

The FR WIPER INT RLY CL- wire is OK. Go to step 11.


	NO

Repair an open or high resistance in the wire.?

11.

Open wire check (WIPER HI/LO RLY CL- line):

Open wire check (WIPER HI/LO RLY CL- line)

?1.

Connect terminals A and B with a jumper wire.

Terminal A	Relay circuit board connector B (14P) No. 4 (LT BLU)
Terminal B	Body ground

?2.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode Under-dash fuse/relay box connector E (36P): disconnected Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected Relay circuit board connector B (14P) No. 4: jumped to body ground
Test circuit	WIPER HI/LO RLY CL-
Test point 1	Under-dash fuse/relay box connector E (36P) No. 29 (LT BLU)
Test point 2	Body ground

Is there continuity?


	YES

The WIPER HI/LO RLY CL- wire is OK. Go to step 12.


	NO

Repair an open or high resistance in the wire.?

12.

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	OFF mode Under-dash fuse/relay box connector E (36P): disconnected Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected Windshield wiper motor 4P connector: disconnected
Test circuit	FR WIPER HI
Test point 1	Relay circuit board connector B (14P) No. 2 (GRY)
Test point 2	Windshield wiper motor 4P connector No. 3 (GRY)

Is there continuity?


	YES

The FR WIPER HI wire is OK. Go to step 13.


	NO

Repair an open or high resistance in the wire.?

13.

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	OFF mode Under-dash fuse/relay box connector E (36P): disconnected Relay circuit board connector B (14P): disconnected Relay circuit board connector C (10P): disconnected Windshield wiper motor 4P connector: disconnected
Test circuit	FR WIPER LO
Test point 1	Relay circuit board connector B (14P) No. 11 (ORN)
Test point 2	Windshield wiper motor 4P connector No. 1 (ORN)

Is there continuity?


	YES

The FR WIPER LO wire is OK. Go to step 14.


	NO

Repair an open or high resistance in the wire.?

14.

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

Faulty MICU; replace the under-dash fuse/relay box.?


	NO

Replace the windshield wiper motor.?