RM3660EC _56 Audio / Visual / Telematics _080751 AUDIO / VIDEO _0392314 AUDIO AND VISUAL SYSTEM(for Gasoline Model with Radio and Display Type (except 10.25 Inch Display)) J

AUDIO / VIDEO  AUDIO AND VISUAL SYSTEM(for Gasoline Model with Radio and Display Type (except 10.25 Inch Display))  Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter  


DESCRIPTION

for Automatic Sound Levelizer (ASL)*:

This circuit is necessary for the Automatic Sound Levelizer (ASL) built into the radio and display receiver assembly.

The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume based on vehicle speed signals sent from the combination meter assembly.

*: w/ Automatic Sound Levelizer (ASL) function



for "Bluetooth" function:

Vehicle speed signals are received from the combination meter assembly and used to cancel "Bluetooth" function operation.

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:
·

A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls its respective system based on this pulse signal.

·

If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the following diagram will not operate normally.



WIRING DIAGRAM

without 12.3 Inch Multi-information Display
E379007
1.542,0.271 2.688,0.531 1.146,0.26 10 false to Other Systems 2.115,1.417 2.427,1.615 0.313,0.198 10 false +S 2.427,1.313 2.74,1.51 0.313,0.198 10 false 36 4.573,1.313 4.885,1.51 0.313,0.198 10 false 17 4.823,1.417 5.271,1.635 0.448,0.219 10 false SPD 4.302,2.094 5.135,2.302 0.833,0.208 10 false I166 4.302,2.26 6.917,2.615 2.615,0.354 10 false Radio and Display Receiver Assembly 1.01,2.073 1.781,2.271 0.771,0.198 10 false I4 1.01,2.24 2.979,2.594 1.969,0.354 10 false Combination Meter Assembly

with 12.3 Inch Multi-information Display
E489786
1.542,0.271 2.688,0.531 1.146,0.26 10 false to Other Systems 2.115,1.417 2.427,1.615 0.313,0.198 10 false +S 2.427,1.313 2.74,1.51 0.313,0.198 10 false 8 4.573,1.313 4.885,1.51 0.313,0.198 10 false 17 4.823,1.417 5.271,1.635 0.448,0.219 10 false SPD 4.302,2.094 5.135,2.302 0.833,0.208 10 false I166 4.302,2.26 6.917,2.615 2.615,0.354 10 false Radio and Display Receiver Assembly 1.01,2.073 1.781,2.271 0.771,0.198 10 false I5 1.01,2.24 2.979,2.594 1.969,0.354 10 false Combination Meter Assembly

PROCEDURE

1.CHECK MODEL
a.

Choose the model to be inspected.

Result:
Result Proceed to
without 12.3 Inch Multi-information Display A
with 12.3 Inch Multi-information Display B




A

2.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)

B

4.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
2.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
a.
E396774
1.448,0.188 1.948,0.5 0.5,0.313 0.698,2.052 1.083,1.521 true 0.573,2.063 0.885,2.26 0.313,0.198 10 false S+ 0.156,0.125 0.469,0.323 0.313,0.198 10 false *a 1.646,0.271 1.958,0.469 0.313,0.198 10 false I4 2.802,3.604 3.26,3.802 0.458,0.198 10 false GND
*a Component with harness connected
(Combination Meter Assembly)


Check the output waveform.

i.

Remove the combination meter assembly with the connector still connected.


ii.

Connect an oscilloscope to terminal I4-36 (+S) and body ground.


iii.

Turn the engine switch on (IG).


iv.

Turn a wheel slowly.


v.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal I4-36 (+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.




Result:
Proceed to
OK
NG



OK

3.INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (INPUT WAVEFORM)

NG

GO TO METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for Optitron Meter Type, Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING


3.INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (INPUT WAVEFORM)
a.

Check the input waveform.

E265791C62
1.646,0.271 2.063,0.531 0.417,0.26 2.604,1.844 2.406,1.406 false 0.177,0.146 0.49,0.344 0.313,0.198 10 false *a 1.719,0.323 2.344,0.688 0.625,0.365 10 false I166 2.5,1.854 2.813,2.052 0.313,0.198 10 false SPD 4.781,1.729 5.094,1.927 0.313,0.198 10 false A 6.167,1.469 6.594,1.688 0.427,0.219 10 false GND
*a Component with harness connected
(Radio and Display Receiver Assembly) 		- -


i.

Remove the radio and display receiver assembly with the connector still connected.


ii.

Connect an oscilloscope to terminal I166-17 (SPD) and body ground.


iii.

Turn the engine switch on (IG).


iv.

Turn a wheel slowly.


v.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal I166-17 (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.




Result:
Proceed to
OK
NG



OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>RADIO RECEIVER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
a.
E396774
1.448,0.188 1.948,0.5 0.5,0.313 2.365,1.375 2.75,0.844 true 2.781,0.698 3.094,0.896 0.313,0.198 10 false S+ 0.156,0.125 0.469,0.323 0.313,0.198 10 false *a 1.646,0.271 1.958,0.469 0.313,0.198 10 false I5 2.802,3.604 3.26,3.802 0.458,0.198 10 false GND
*a Component with harness connected
(Combination Meter Assembly)


Check the output waveform.

i.

Remove the combination meter assembly with the connector still connected.


ii.

Connect an oscilloscope to terminal I5-8 (+S) and body ground.


iii.

Turn the engine switch on (IG).


iv.

Turn a wheel slowly.


v.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal I5-8 (+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.




Result:
Proceed to
OK
NG



OK

5.INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (INPUT WAVEFORM)

NG

GO TO METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for 12.3 Inch Display)>HOW TO PROCEED WITH TROUBLESHOOTING


5.INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (INPUT WAVEFORM)
a.

Check the input waveform.

E265791C62
1.646,0.271 2.063,0.531 0.417,0.26 2.604,1.844 2.406,1.406 false 0.177,0.146 0.49,0.344 0.313,0.198 10 false *a 1.719,0.323 2.344,0.688 0.625,0.365 10 false I166 2.5,1.854 2.813,2.052 0.313,0.198 10 false SPD 4.781,1.729 5.094,1.927 0.313,0.198 10 false A 6.167,1.469 6.594,1.688 0.427,0.219 10 false GND
*a Component with harness connected
(Radio and Display Receiver Assembly) 		- -


i.

Remove the radio and display receiver assembly with the connector still connected.


ii.

Connect an oscilloscope to terminal I166-17 (SPD) and body ground.


iii.

Turn the engine switch on (IG).


iv.

Turn a wheel slowly.


v.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal I166-17 (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.




Result:
Proceed to
OK
NG



OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>RADIO RECEIVER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR