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
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK VEHICLE SIGNAL (OPERATION CHECK) |
(a) Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal Check Mode in Operation Check. Click here |
|
(b) While driving the vehicle, compare the "SPEED" indicator to the reading on the speedometer. Check if these readings are almost equal.
HINT:
The combination meter assembly receives the vehicle speed signal from the skid control ECU via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the skid control ECU because it is the source of the vehicle speed signal.
OK:
Vehicle speed displayed on the "Vehicle Signal Check Mode" screen is almost the same as the actual vehicle speed measured using the Techstream.
Click here
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) |
(a) Check the output waveform.
*a |
Component with harness connected (Combination Meter Assembly) |
- |
- |
(1) Remove the combination meter assembly with the connector still connected.
(2) Connect an oscilloscope to terminal F4-6 (+S) and body ground.
(3) Turn the engine switch on (IG).
(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 |
|
3. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (INPUT WAVEFORM) |
(a) Check the input waveform.
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
- |
- |
(1) Remove the radio and display receiver assembly with the connector still connected.
(2) Connect an oscilloscope to terminal F129-27 (SPD) and body ground.
(3) Turn the engine switch on (IG).
(4) Turn a wheel slowly.
(5) Check the signal waveform according to the condition(s) in the table below.
Item |
Condition |
---|---|
Measurement terminal |
F129-27 (SPD) - 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.
OK |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
4. |
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 > Washer Level Warning Switch: Installation
INSTALLATION
PROCEDURE
1. INSTALL LEVEL WARNING SWITCH ASSEMBLY
(a) Install the level warning switch assembly as shown in the illustration.
Install in this Direction
(b) Connect the connector.
2. ADD WASHER FLUID
Click here
3. INSTALL FRONT FENDER LINER RH
...
Toyota CH-R Service Manual > Steering Pad Switch: Removal
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration)
that must be performed after parts are removed, installed, or replaced during the
steering pad switch assembly removal/installation are shown below.
Necessary Procedures After P ...