DESCRIPTION
The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume level in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume level based upon vehicle speed signals that it receives from the combination meter assembly.
The radio and display receiver assembly recognizes that the vehicle is being driven and makes it impossible to connect or register a "Bluetooth" device while driving.
HINT:
WIRING DIAGRAM
PROCEDURE
1. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) |
(a) Check the output waveform.
(1) Remove the combination meter assembly with the connector still connected.
Click here
(2) Connect an oscilloscope to terminal F4-6 (+S) and body ground.
*a |
Component with harness connected (Combination Meter Assembly) |
- |
- |
(3) Turn the ignition switch to ON.
(4) Turn a wheel slowly.
(5) Check the signal waveform according to the condition(s) in the table below.
Item |
Condition |
---|---|
Measurement terminal |
F4-6 (+S) - Body ground |
Tool setting |
5 V/DIV., 20 ms./DIV. |
Vehicle condition |
Wheel being rotated |
OK:
The waveform is similar to that shown in the illustration.
HINT:
When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
NG | ![]() |
GO TO METER / GAUGE SYSTEM |
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the F129 radio and display receiver assembly connector.
(b) Disconnect the F4 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F129-27 (SPD) - F4-6 (+S) |
Always |
Below 1 Ω |
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Toyota CH-R Service Manual > Immobiliser System(w/ Smart Key System): Parts Location
PARTS LOCATION
ILLUSTRATION
*1
ECM
*2
NO. 1 ENGINE ROOM RELAY BLOCK
ILLUSTRATION
*1
ENGINE SWITCH
*2
STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
*3
...
Toyota CH-R Service Manual > Air Conditioning Unit(for Valeo Made): Disassembly
DISASSEMBLY
PROCEDURE
1. PRECAUTION
NOTICE:
Make sure to perform initialization after replacing the air conditioning radiator
damper servo sub-assembly. If initialization is not performed, the air conditioner
unit assembly will not perform properly as the air conditioning amplifier assembly ...