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, also 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.
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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 hook switch pushed |
313 to 345 Ω |
|
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 |
|
2. |
INSPECT STEERING PAD SWITCH ASSEMBLY |
(a) Remove the steering pad switch assembly.
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(b) Inspect the steering pad switch assembly.
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NG |
REPLACE STEERING PAD SWITCH ASSEMBLY |
|
3. |
INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
(a) Remove the spiral cable with sensor sub-assembly.
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(b) Inspect the spiral cable with sensor sub-assembly.
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NOTICE:
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY OR BODY GROUND) |
NG |
REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
Toyota CH-R Service Manual > Toyota Entune System: System Diagram
SYSTEM DIAGRAM
HINT:
Refer to following systems for details of the system diagram for Toyota Entune
System.
Audio and Visual System (w/o Navigation System)
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Navigation System (w/ Navigation System)
Click here
Safety Connect System
Click he ...
Toyota CH-R Service Manual > Immobiliser System(w/ Smart Key System): Dtc Check / Clear
DTC CHECK / CLEAR
NOTICE:
When using the Techstream with the engine switch off, connect the Techstream
to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds
or less until communication between the Techstream and the vehicle begins. Then
select the vehicle type u ...