Steering Pad Switch Circuit
Circuit diagnosis
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
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 |
Disconnect the radio receiver connector R4.
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
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| OK | ||
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| 2. INSPECT STEERING PAD SWITCH ASSEMBLY |
Disconnect the steering pad switch connector A.
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
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| OK | |
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| 3. INSPECT SPIRAL CABLE |
Disconnect the steering pad switch and spiral cable connectors.
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
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| OK | ||
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