AUDIO AND VISUAL SYSTEM Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the radio receiver assembly.

If there is an open in this circuit, the audio system cannot be operated using the steering pad switch assembly.

If there is a short in this circuit, the same condition as when a switch is continuously depressed occurs.

Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and also the radio receiver assembly itself cannot function.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)

   
   

   1. Disconnect the D12 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition D12-21 (SW1+) - D12-23 (SWGND) No switch pushed 95 to 105 kΩ Seek+ switch pushed Below 2.5 Ω Seek- switch pushed 313 to 345 Ω Volume+ switch pushed 950 to 1050 Ω Volume- switch pushed 2955 to 3265 Ω D12-22 (SW2+) - D12-23 (SWGND) No switch pushed 95 to 105 kΩ MODE switch pushed Below 2.5 Ω

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

   NG

2. INSPECT STEERING PAD SWITCH ASSEMBLY

   
   

   1. Remove the steering pad switch assembly. Click here

   2. Inspect the steering pad switch assembly. Click here

   
   

   NG

   REPLACE STEERING PAD SWITCH ASSEMBLY Click here

   OK

3. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

   
   

   1. Remove the spiral cable with sensor sub-assembly. Click here

   2. Inspect the spiral cable with sensor sub-assembly. Click here

   
   

   OK

   REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

   NG

   REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here