Audio And Visual System Steering Pad Switch Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SPIRAL CABLE)
INSPECT SPIRAL CABLE
INSPECT STEERING PAD SWITCH ASSEMBLY
AUDIO AND VISUAL SYSTEM - Steering Pad Switch Circuit |
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 audio and visual system cannot be operated using 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 audio and visual system cannot be operated using the steering pad switch, and the audio and visual system itself cannot function.
WIRING DIAGRAM
INSPECTION PROCEDURE
- CAUTION:
- The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution for the Supplemental Restraint System (Toyota Fortuner RM000000KT106KX.html).
| 1.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SPIRAL CABLE) |
Disconnect the R4 receiver connector.
Disconnect the S13 cable connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
R4-8 (SW2) - S13-5 (AU2)
| Always
| Below 1 Ω
|
R4-6 (SWG) - S13-4 (EAU)
|
R4-7 (SW1) - S13-6 (AU1)
|
R4-8 (SW2) - Body ground
| Always
| 10 kΩ or higher
|
R4-6 (SWG) - Body ground
|
R4-7 (SW1) - Body ground
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
Disconnect the cable connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
S13-4 (EAU) - 8 (EAU)
| Spiral cable is turned 2.5 rotations counterclockwise
| Below 1 Ω
|
Spiral cable is centered
|
Spiral cable is turned 2.5 rotations clockwise
|
S13-5 (AU2) - 9 (AU2)
| Spiral cable is turned 2.5 rotations counterclockwise
|
Spiral cable is centered
|
Spiral cable is turned 2.5 rotations clockwise
|
S13-6 (AU1) - 10 (AU1)
| Spiral cable is turned 2.5 rotations counterclockwise
|
Spiral cable is centered
|
Spiral cable is turned 2.5 rotations clockwise
|
- CAUTION:
- The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the supplemental restraint system (Toyota Fortuner RM000000KT106KX.html).
| 3.INSPECT STEERING PAD SWITCH ASSEMBLY |
Disconnect the switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
9 (AU2) - 8 (EAU)
| No switch is pushed
| 100 kΩ or higher
|
MODE switch is pushed
| Below 2.5 Ω
|
10 (AU1) - 8 (EAU)
| No switch is pushed
| 100 kΩ or higher
|
Seek+ switch is pushed
| Below 2.5 Ω
|
Seek- switch is pushed
| 329 Ω
|
Vol+ switch is pushed
| 1000 Ω
|
Vol- switch is pushed
| 3110 Ω
|
