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 |
Precaution
PRECAUTION
1. INITIALIZATION
NOTICE:
If the ECM is replaced, register the ECU communication ID for Engine
Immobiliser System (See page ).
Perform Registration (VIN registration) when replacing the ECM (See
page ).
HINT:
The engine learned value cannot be rese ...
Daytime Running Light Relay Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the daytime running lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing
the following inspection procedure.
If the main body ECU (mult ...
Definition Of Terms
DEFINITION OF TERMS
Term
Definition
Monitor description
Description of what the ECM monitors and how it detects malfunctions
(monitoring purpose and details).
Related DTCs
Group of diagnostic trouble codes that are ou ...