Toyota CH-R Service Manual: Steering Pad Switch Circuit

DESCRIPTION

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

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

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

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)

(a) Disconnect the F129 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F129-21 (SW1) - F129-24 (SWG)

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

F129-22 (SW2) - F129-24 (SWG)

No switch pushed

95 to 105 kΩ

MODE switch pushed

Below 2.5 Ω

On/off hook switch pushed

950 to 1050 Ω

Voice switch pushed

2955 to 3265 Ω

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly.

Click here

(b) Inspect the steering pad switch assembly.

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

3.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly.

Click here

(b) Inspect the spiral cable sub-assembly.

Click here

OK

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

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

    Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
    DESCRIPTION for Automatic Sound Levelizer (ASL): This circuit is necessary for the Automatic Sound Levelizer (ASL) built into the radio and display receiver assembly. The Automatic So ...

    Illumination Circuit
    DESCRIPTION Power is supplied to the radio and display receiver assembly and steering pad switch assembly illumination when the light control switch is in the tail or head position. WIRING DIAGR ...

    Other materials:

    Toyota CH-R Service Manual > Front Drive Shaft Assembly: Inspection
    INSPECTION PROCEDURE 1. INSPECT FRONT DRIVE SHAFT ASSEMBLY (a) Check that there is no excessive play in the radial direction of the outboard joint. (b) Check that the inboard joint slides smoothly in the thrust direction. (c) Check ...

    Toyota CH-R Service Manual > Power Steering System: Torque Sensor Zero Point Adjustment Undone (C1515)
    DESCRIPTION This DTC does not indicate a malfunction. The power steering ECU assembly stores this DTC when it determines that torque sensor zero point calibration has not been performed. DTC No. Detection Item DTC Detection Condition Trouble Area ...

    © 2017-2021 Copyright www.tochr.net
    0.0255