POWER SUPPLY AND GROUND CIRCUIT
AUDIO UNIT
AUDIO UNIT : Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK FUSE
Check that the following fuses are not blown.
Are the fuses blown? YES >> Replace the blown fuse after repairing the affected circuit.
NO >> GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK GROUND CIRCUIT
Is the inspection result normal? YES >> Inspection End.
NO >> Repair or replace harness or connectors.
FRONT TWEETER
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CONNECTOR CHECK
Check the audio unit and speaker connectors for the following:
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair the terminals or connectors.
2.CHECK FRONT TWEETER SIGNAL CIRCUIT CONTINUITY
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK FRONT TWEETER SIGNAL
Is the inspection result normal? YES >> Replace front tweeter. Refer to AV-66, "Removal and Installation".
NO >> Replace audio unit. Refer to AV-64, "Removal and Installation".
FRONT DOOR SPEAKER
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CONNECTOR CHECK
Check the audio unit and speaker connectors for the following:
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair the terminals or connectors.
2.CHECK FRONT DOOR SPEAKER SIGNAL CIRCUIT CONTINUITY
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK FRONT DOOR SPEAKER SIGNAL
Is the inspection result normal? YES >> Replace front door speaker. Refer to AV-67, "Removal and Installation".
NO >> Replace audio unit. Refer to AV-64, "Removal and Installation".
REAR DOOR SPEAKER
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CONNECTOR CHECK
Check the audio unit and speaker connectors for the following:
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair the terminals or connectors.
2.CHECK REAR DOOR SPEAKER SIGNAL CIRCUIT CONTINUITY
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK REAR DOOR SPEAKER SIGNAL
Is the inspection result normal? YES >> Replace rear door speaker. Refer to AV-68, "Removal and Installation".
NO >> Replace audio unit. Refer to AV-64, "Removal and Installation".
REAR VIEW CAMERA IMAGE SIGNAL CIRCUIT
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK REVERSE INPUT SIGNAL
Is inspection result normal? YES >> GO TO 2.
NO >> Repair or replace harness or connectors.
2.CHECK CAMERA POWER SUPPLY CIRCUIT CONTINUITY
Is inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK CAMERA POWER SUPPLY VOLTAGE
Is inspection result normal? YES >> GO TO 4.
NO >> Replace audio unit. Refer to AV-64, "Removal and Installation".
4.CHECK CAMERA IMAGE SIGNAL CIRCUIT CONTINUITY
Is inspection result normal? YES >> GO TO 5.
NO >> Repair or replace harness or connectors.
5.CHECK CAMERA GROUND CIRCUIT CONTINUITY
Check continuity between audio unit connector M87 and rear view camera connector D504.
Is inspection result normal? YES >> GO TO 6.
NO >> Repair or replace harness or connectors.
6.CHECK CAMERA IMAGE SIGNAL
Is inspection result normal? YES >> Replace audio unit. Refer to AV-64, "Removal and Installation".
NO >> Replace rear view camera. Refer to AV-71, "Removal and Installation".
MICROPHONE SIGNAL CIRCUIT
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK HARNESS BETWEEN AUDIO UNIT AND MICROPHONE
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair harness or connectors.
2.CHECK MICROPHONE POWER SUPPLY
Is the inspection result normal? YES >> GO TO 3.
NO >> Replace audio unit. Refer to AV-64, "Removal and Installation".
3.CHECK MICROPHONE SIGNAL
Check signal between terminals of audio unit connector M87.
Is the inspection result normal? YES >> Replace audio unit. Refer to AV-64, "Removal and Installation".
NO >> Replace microphone. Refer to AV-70, "Removal and Installation".
STEERING SWITCH
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
Is the inspection result normal? YES >> GO TO 2.
NO >> Replace steering switches. Refer to AV-65, "Removal and Installation".
2.CHECK HARNESS BETWEEN COMBINATION METER AND COMBINATION SWITCH
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connectors.
3.CHECK COMBINATION SWITCH
Check continuity between combination switch connectors M90 and M30.
Is the inspection result normal? YES >> GO TO 4.
NO >> Replace spiral cable. Refer to SR-15, "Removal and Installation".
4.CHECK HARNESS BETWEEN COMBINATION METER AND AUDIO UNIT
Is the inspection result normal? YES >> Replace audio unit. Refer to AV-64, "Removal and Installation".
NO >> Repair or replace harness or connectors.
USB CONNECTOR
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK USB INTERFACE HARNESS CONTINUITY
Is the inspection result normal? YES >> Replace the USB interface. Refer to AV-69, "Removal and Installation".
NO >> Repair or replace harness or connectors.
AUXILIARY INPUT JACK
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-27, "Wiring Diagram".
1.CHECK AUX JACK HARNESS CONTINUITY
Is the inspection result normal? YES >> Replace the AUX in jack. Refer to AV-69, "Removal and Installation".
NO >> Repair or replace harness or connectors.
Precaution
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