NAVIGATION SYSTEM > Steering Pad Switch Circuit

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DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the radio receiver.
If there is an open in the circuit, the navigation system cannot be operated by the steering pad switch.
If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the navigation system cannot be operated by the steering pad switch, and the navigation system itself cannot function.

WIRING DIAGRAM


E111723E01


INSPECTION PROCEDURE

NOTICE:
The vehicle is equipped with an SRS (Supplemental Restraint System) such as airbags. Before servicing (Including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (Click here).

1.INSPECT RADIO RECEIVER


    E110928E01

  1. Disconnect the radio receiver connector R4.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    SW2 - SWG
    		No switch is pushed
    		Approx. 100 kΩ
    SW2 - SWG
    		VOICE switch: push
    		Approx. 3.2 kΩ
    SW2 - SWG
    		ON HOOK switch: push
    		Approx. 0.3 kΩ
    SW2 - SWG
    		OFF HOOK switch: push
    		Approx. 1.0 kΩ



NG
Go to step 2
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL 

2.INSPECT STEERING PAD SWITCH ASSEMBLY


  1. Disconnect the steering pad switch connector A.


    I045245E01

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:

    Tester connection
    		Condition
    		Specified condition
    AU2 - EAU
    		No switch is pushed
    		 Approx. 100 kΩ
    AU2 - EAU
    		VOICE switch: push
    		Approx. 3.2 kΩ
    AU2 - EAU
    		ON HOOK switch: push
    		Approx. 0.3 kΩ
    AU2 - EAU
    		OFF HOOK switch: push
    		Approx. 1.0 kΩ



NG
REPLACE STEERING PAD SWITCH ASSEMBLY
OK


3.INSPECT SPIRAL CABLE


    I039337E05

  1. Disconnect the steering pad switch and spiral cable connectors.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    EAU - EAU
    		Always
    		Below 1 Ω
    AU2 - AU2
    		Always
    		Below 1 Ω



NG
REPLACE SPIRAL CABLE
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)