Power supply and ground circuit
Audio unit
AUDIO UNIT : Diagnosis Procedure
Regarding wiring diagram information, refer to av-88, "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.
BluetoothВ® control unit
BLUETOOTHВ® CONTROL UNIT : Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-88, "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 door speaker
Diagnosis procedure
Regarding Wiring Diagram information, refer to AV-88, "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-124, "removal and installation".
No >> replace audio unit. Refer to av-122, "removal and installation".
Front tweeter
Diagnosis procedure
Regarding Wiring Diagram information, refer to AV-88, "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-123, "removal and installation".
No >> replace audio unit. Refer to av-122, "removal and installation".
Rear speaker
Diagnosis procedure
Regarding Wiring Diagram information, refer to AV-88, "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 speaker signal circuit continuity
Is the inspection result normal? Yes >> go to 3
No >> repair or replace harness or connectors.
3.Check rear speaker signal
Is the inspection result normal? Yes >> replace rear speaker. Refer to av-125, "removal and installation".
No >> replace audio unit. Refer to av-122, "removal and installation".
BluetoothВ® voice signal circuit
Diagnosis procedure
Regarding wiring diagram information, refer to av-88, "wiring diagram".
1.Check bluetoothВ® voice signal circuit continuity
Is inspection result normal? Yes >> go to 2.
No >> repair or replace harness or connectors.
2.Check bluetoothВ® voice signal ground circuit continuity
Check continuity between audio unit connector m93 and bluetoothВ® control unit connector m45.
Is inspection result normal? Yes >> go to 3.
No >> repair or replace harness or connectors.
3.Check bluetoothВ® voice signal
Is the inspection result normal? Yes >> replace bluetoothВ® control unit. Refer to av-134, "removal and installation".
No >> replace audio unit. Refer to av-122, "removal and installation".
BluetoothВ® control signal circuit
Diagnosis procedure
Regarding wiring diagram information, refer to av-88, "wiring diagram".
1.Check control signal circuit continuity
Is the inspection result normal? YES >> Replace BluetoothВ® control unit. Refer to AV-134, "Removal and Installation".
NO >> Repair or replace harness or connectors.
Microphone signal circuit
Diagnosis Procedure
Regarding wiring diagram information, refer to av-88, "wiring diagram".
1.Check harness between bluetoothВ® control unit and microphone
Are continuity results as specified? Yes >> go to 2
NO >> Repair harness or connectors.
2.Check microphone power supply
Is the voltage reading as specified? Yes >> go to 3
No >> replace bluetoothВ® control unit. Refer to av-134, "removal and installation".
3.Check microphone signal
Check signal between terminals of BluetoothВ® control unit connector M45.
Were voltage readings as specified? Yes >> replace bluetoothВ® control unit. Refer to av-134, "removal and installation".
No >> replace microphone. Refer to av-135, "removal and installation".
Steering switch
Diagnosis procedure
Regarding wiring diagram information, refer to av-88, "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-208, "Removal and Installation".
2.Check harness between bluetoothВ® control unit and combination switch (spiral cable)
Is the inspection result normal? Yes >> go to 3.
NO >> Repair or replace harness or connectors.
3.Check combination switch (spiral cable)
Check continuity between combination switch (spiral cable) connectors m79 and m80.
Is the inspection result normal? Yes >> go to 4.
No >> replace combination switch (spiral cable). Refer to sr-16, "removal and installation".
4.Check harness between bluetoothВ® control unit and audio unit
Is the inspection result normal? Yes >> replace audio unit. Refer to av-203, "removal and installation".
No >> repair or replace harness or connectors.
Usb connector
Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV-88, "Wiring Diagram".
1.Check usb interface harness continuity
Is the inspection result normal? YES >> Replace the USB interface. Refer to AV-132, "Removal and Installation".
NO >> Repair or replace harness or connectors.
Precaution for Work
When removing or disassembling each component, be careful not to damage
or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
When removing (disengaging) components with a screwdriver or similar
tool, be sure to wrap the component
with a ...
Vehicle loading information
WARNING
It is extremely dangerous to ride
in a cargo area inside a vehicle. In
a collision, people riding in these
areas are more likely to be seriously
injured or killed.
Do not allow people to ride in any
area of your vehicle that is not
equipped with seats a ...
C1604 Torque sensor
DTC Logic
DTC DETECTION LOGIC
DTC
Display item
Malfunction detected condition
Possible cause
C1604
TORQUE SENSOR
When torque sensor output signal is malfunctioning
Harness or connector
Torque sensor
EPS control unit
DTC CONFIRMATION ...