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.
Basic inspection
Symptom diagnosisCompression pressure
CHECKING COMPRESSION PRESSURE
Warm up the engine to full operating temperature.
Release the fuel pressure. Refer to EC-144, "Work Procedure".
Remove the ignition coil and spark plug from each cylinder. Refer
to EM-36, "Removal and Installation"
and ...
Preparation
Special Service Tools
The actual shape of the tools may differ from those illustrated here.
Tool number
(TechMate No.)
Tool name
Description
KV10111100
(J-37228)
Seal cutter
Removing oil pan (lower) etc.
Commercial Service Tools
T ...
Sunshade system does not operate properly
Diagnosis Procedure
1.CHECK BCM POWER SUPPLY AND GROUND CIRCUIT
Check BCM power supply and ground circuit.
Refer to BCS-68, "Diagnosis Procedure" (with Intelligent Key System), BCS-128,
"Diagnosis Procedure" (without
Intelligent Key System).
Is the inspection result no ...