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 |
System Description
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
The following pattern will be used: "Operation" indicates user operation using
the smart key system. "Expected operation of the vehicle" indicates how a known
good vehicle will react in accordance with each operation. "Suspected ...
List of storage features
Glove box
Overhead console (Access Cab and
Double Cab models)
Bottle holders
Auxiliary boxes
Front console box (separated type
front seat only)
Cup holders
CAUTION
■Items that should not be left in the storage spaces
Do not leave glasses, lighters or spray cans in the stora ...
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) The vehicle's ECU uses the ISO 9141-2 for communication protocol. The terminal
arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
Symbols (Terminal No.)
Terminal Description
Condition
...