Steering Switch Signal Gnd Circuit Base Audio Without Rear View Camera

STEERING SWITCH SIGNAL GND CIRCUIT





Description
Transmits the steering switch signal to AV control unit.




Diagnosis Procedure
1.CHECK STEERING SWITCH SIGNAL GND CIRCUIT
1. Disconnect AV control unit connector and spiral cable connector.
2. Check continuity between AV control unit harness connector and spiral cable harness connector.





3. Connect AV control unit connector.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace spiral cable.
3.CHECK GROUND CIRCUIT
1. Connect AV control unit connector.
2. Check continuity between AV control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace AV control unit.
4.CHECK STEERING SWITCH
1. Turn ignition switch OFF.
2. Check steering switch. SEE Component Inspection.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace steering switch.




Component Inspection
Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.





Standard
Between terminals 14 and 17
MENU DOWN switch ON : Approx. 318 - 324 Ohms
MENU UP switch ON : Approx. 120 - 122 Ohms
SOURCE switch ON : Approx. 0 Ohms
Between terminals 15 and 17
VOL UP switch ON : Approx. 120 - 122 Ohms
VOL DOWN switch ON : Approx. 0 Ohms