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DTC Troubleshooting: B1077

DTC B1077:
 Windshield Wiper (As) Signal Error
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0) and then back to ON (II).
  1. 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 4 .
NO -
Go to Step 13 .
  1. 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.■
  1. Turn the ignition switch to LOCK (0).
Does the wiper motor run and does it pulse normally?
YES -
Go to Step 7 .
NO -
Replace the windshield wiper motor and recheck.■
  1. Disconnect the windshield wiper motor 5P connector.
  1. Disconnect the under-dash fuse/relay box connector A (36P) [B (36P)].
    [ ]: LHD model
  1. Check for continuity between the windshield wiper motor 5P connector No. 3 [No. 1] terminal and under-dash fuse/relay box connector A (36P) No. 19 terminal or under-dash fuse/relay box connector B (36P) No. 20 terminal.
    [ ]: LHD model
Is there continuity?
YES -
Go to Step 10 .
NO -
Repair an open in the PNK wire.■
RHD model
LHD model

  1. Check for continuity between the windshield wiper motor 5P connector No. 3 [No. 1] terminal and body ground.
    [ ]: LHD model
Is there continuity?
YES -
Repair a short to ground in the PNK wire.■
NO -
Go to Step 11 .
  1. Turn the ignition switch to ON (II).
RHD model
LHD model

  1. Measure the voltage between the windshield wiper motor 5P connector No. 3 [No. 1] terminal and body ground.
    [ ]: LHD model
Is there voltage?
YES -
Repair a short to ground in the PNK wire.■
NO -
Faulty MICU; replace the under-dash fuse/relay box.■
  1. Turn the ignition switch to LOCK (0).
  1. Check the No. 56 (30 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to Step 15 .
NO -
Replace the fuse and recheck the system.■
Does the wiper motor run normally?
YES -
Go to Step 16 .
NO -
Replace the windshield wiper motor and recheck.■
  1. Disconnect under-dash fuse/relay box connector A (36P) and the windshield wiper motor 5P connector.
RHD model
LHD model

  1. Check for continuity between under-dash fuse/relay box connector A (36P) terminals and the windshield wiper motor 5P connector terminals as shown:
    Under-dash fuse/relay box connector A (36P)
    Windshield wiper motor 5P connector
    7
    1 [5]
    14
    4 [3]

    [ ]:
    LHD model

Is there continuity?
YES -
Go to Step 18 .
NO -
Repair an open in the BLU (LOW) or GRN (HIGH) wire.■
RHD model
LHD model

  1. Check for continuity between the windshield wiper motor 5P connector No. 5 [No. 4] terminal and body ground.
    [ ]: LHD model
Is there continuity?
YES -
NO -
Repair an open in the BLK wire or poor ground (G202).■
RHD model
LHD model