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 also the radio and display receiver assembly itself cannot 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 precautionary notice for the Supplemental Restraint System (See page ).
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL) |
(a) Disconnect the radio and display receiver assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
R31-21 (SW1) - R31-23 (SWG) |
No switch is pushed |
99 to 101 kΩ |
Volume+ is pushed |
1000 to 1020 Ω |
|
Volume- is pushed |
3178 to 3242 Ω |
|
Seek+ is pushed |
Below 2.5 Ω |
|
Seek- is pushed |
327 to 333 Ω |
|
R31-22 (SW2) - R31-23 (SWG) |
No switch is pushed |
99 to 101 kΩ |
MODE switch is pushed |
Below 2.5 Ω |
|
On Hook switch is pushed |
327 to 333 Ω |
|
Off Hook switch is pushed |
1000 to 1020 Ω |
|
Voice switch is pushed |
3178 to 3242 Ω |
*a |
Front view of wire harness connector (to Radio and Display Receiver Assembly) |
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT STEERING PAD SWITCH ASSEMBLY |
(a) Remove the steering pad switch assembly (See page ).
(b) Inspect the steering pad switch assembly (See page ).
NG |
REPLACE STEERING PAD SWITCH ASSEMBLY |
|
3. |
INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
(a) Remove the spiral cable with sensor sub-assembly (See page ).
(b) Inspect the spiral cable with sensor sub-assembly (See page ).
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 |
Removal
REMOVAL
PROCEDURE
1. REMOVE AUTOMATIC TRANSMISSION ASSEMBLY (for Automatic Transmission)
Transmission
See page
AC60E
AC60F
2. REMOVE MANUAL TRANSMISSION ASSEMBLY (for Manual Transmission)
(See page )
...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the LIN communication system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
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System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
Millimeter Wave Radar Sensor Assembly
Forward Recognition Camera
Pre-collision alarm signal
Pre-collision braking operation signal
...