RM3660EC _58 Vehicle Interior _080793 METER / GAUGE / DISPLAY _0473175 METER / GAUGE SYSTEM(for 12.3 Inch Display) J

METER / GAUGE / DISPLAY  METER / GAUGE SYSTEM(for 12.3 Inch Display)  Speed Signal Circuit  


DESCRIPTION

The combination meter assembly receives the vehicle speed signal from this circuit. The wheel speed sensors produce an output that varies according to the vehicle speed. The wheel speed sensor output is received by the skid control ECU (brake actuator assembly) which uses this information to create the vehicle speed signal. The vehicle speed signal is output from the skid control ECU (brake actuator assembly) to the certification ECU (smart key ECU assembly) and then to the combination meter assembly. To create this signal, 12 V is output from terminal SI of the combination meter assembly to the certification ECU (smart key ECU assembly). The pulse signal is created by switching the transistor in the certification ECU (smart key ECU assembly) on and off, making the voltage on the wire drop to 0 V. A similar system is used for the output of this signal from the combination meter assembly via terminal +S. A voltage of 12 V or 5 V is applied to terminal +S from each ECU or relay that is connected to this terminal. The transistor in the combination meter assembly is controlled by the signal from the certification ECU (smart key ECU assembly). When this transistor is turned on, this transistor makes the voltage supplied by the various ECUs (via their respective internal resistors) drop to 0 V. Each ECU connected to terminal +S of the combination meter assembly controls its respective system based on this pulse signal.

HINT:

This circuit is used for the systems connected to terminal +S. This signal is not used for combination meter assembly operation. Combination meter assembly components such as the speedometer operate using data received via CAN communication. In addition, for some systems, vehicle speed information may be received via CAN communication.


WIRING DIAGRAM

E541207
5.094,4.281 5.552,4.479 0.458,0.198 10 false I4 5.083,4.448 6.99,4.75 1.906,0.302 10 false Combination Meter Assembly 5.427,3.563 5.74,3.76 0.313,0.198 10 false +S 5.427,1.813 5.74,2.01 0.313,0.198 10 false SI 5.229,1.125 5.844,1.323 0.615,0.198 10 false 6 5.156,1.813 5.469,2.01 0.313,0.198 10 false 25 5.208,3.563 5.365,3.76 0.156,0.198 10 false 8 1.875,1.927 2.333,2.125 0.458,0.198 10 false I196 1.375,1.938 1.99,2.135 0.615,0.198 10 false SPDO 1.927,1.708 2.24,1.906 0.313,0.198 10 false 28 1.458,0.49 1.917,0.688 0.458,0.198 10 false SPD 1.844,0.49 2.302,0.688 0.458,0.198 10 false O187 1.917,0.271 2.229,0.469 0.313,0.198 10 false 13 0.573,2.333 2.104,2.823 1.531,0.49 10 false Certification ECU (Smart Key ECU Assembly) 0.75,4.042 1.208,4.24 0.458,0.198 10 false A142 1.854,3.552 2.167,3.75 0.313,0.198 10 false 93 1.458,3.563 1.917,3.76 0.458,0.198 10 false SPD 0.76,4.229 3.51,4.427 2.75,0.198 10 false ECM*3 0.49,5.896 2.177,6.281 1.688,0.385 10 false Radio and Display Receiver Assembly*4 0.49,5.729 0.802,5.927 0.313,0.198 10 false I210 1.469,5.302 1.927,5.5 0.458,0.198 10 false SPD 1.854,5.302 2.01,5.5 0.156,0.198 10 false 8 5.135,5.927 7.115,6.573 1.979,0.646 10 false Navigation Receiver Assembly*5 5.448,5.302 5.906,5.5 0.458,0.198 10 false SPD 5.135,5.74 5.594,5.938 0.458,0.198 10 false I187 5.24,5.302 5.552,5.5 0.313,0.198 10 false 8 0.615,6.656 3.365,6.854 2.75,0.198 10 false *1: for GTMC Made 3.469,0.49 6.49,0.854 3.021,0.365 10 false Skid Control ECU (Brake Actuator Assembly) 4.448,5.302 4.76,5.5 0.313,0.198 10 false *5 2.313,0.49 2.771,0.688 0.458,0.198 10 false I197 2.354,0.271 2.667,0.469 0.313,0.198 10 false 13 1.917,0.729 2.229,0.927 0.313,0.198 10 false *1 2.354,0.729 2.667,0.927 0.313,0.198 10 false *2 2.604,5.302 2.917,5.5 0.313,0.198 10 false *4 0.625,7.052 3.375,7.25 2.75,0.198 10 false *2: for TFTM Made 0.615,7.427 3.365,7.625 2.75,0.198 10 false *3: for Gasoline Model 2.594,3.563 2.906,3.76 0.313,0.198 10 false *3 2.688,7.052 5.438,7.25 2.75,0.198 10 false *5: for Navigation Receiver Type 2.688,6.667 5.438,6.865 2.75,0.198 10 false *4: for Radio and Display Type 2.948,1.24 4.5,1.813 1.552,0.573 10 false from IGR NO. 1 Relay 5.417,1.125 6.031,1.323 0.615,0.198 10 false IG+

CAUTION / NOTICE / HINT

NOTICE:
·

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

·

Before replacing any of the following ECUs, refer to Service Bulletin.

-

ECM*

-

Certification ECU (smart key ECU assembly)

*: for Gasoline Model



·

When the electronically controlled brake system is malfunctioning, a correct vehicle speed signal may not be received. Before preforming this procedure, confirm that the electronically controlled brake system is not malfunctioning.

for HV Model: Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model)>HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model: Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (except NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

When replacing any of the following ECUs, update the ECU security key.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>UPDATE ECU SECURITY KEY

-

ECM*

-

Certification ECU (smart key ECU assembly)

-

Combination meter assembly

*: for Gasoline Model





PROCEDURE

1.INSPECT COMBINATION METER ASSEMBLY (INPUT WAVEFORM)
E391284C82
1.479,0.438 1.896,0.667 0.417,0.229 2.635,2 2.375,1.5 true 1.615,0.479 2.042,0.708 0.427,0.229 10 false I4 2.656,2.021 2.969,2.219 0.313,0.198 10 false SI 2.948,3.698 3.406,3.896 0.458,0.198 10 false GND 1.281,3.979 1.438,4.177 0.156,0.198 10 false A 0.406,0.479 0.719,0.677 0.313,0.198 10 false *a 0.448,2.458 0.76,2.656 0.313,0.198 10 false *b
*a Component with harness connected
(Combination Meter Assembly)
*b Waveform


a.

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

Item Condition
Tester connection I4-25 (SI) - Body ground
Tool setting 5 V/DIV., 20 ms./DIV.
Condition Ignition switch ON, wheel being rotated

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:
Result Proceed to
The measured waveform is similar to that in the illustration A
The measured waveform is not similar to that in the illustration
(Stuck low) 		B
The measured waveform is not similar to that in the illustration
(Stuck high) 		C



A

2.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)

B

6.CHECK FOR DTC (SMART ENTRY AND START SYSTEM (FOR START FUNCTION))

C

9.CHECK FOR DTC (SMART ENTRY AND START SYSTEM (FOR START FUNCTION))
2.INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
E436103C18
1.479,0.438 1.896,0.667 0.417,0.229 2.49,1.292 2.927,0.771 true 1.615,0.479 1.958,0.677 0.344,0.198 10 false I4 2.917,0.615 3.229,0.813 0.313,0.198 10 false +S 2.948,3.698 3.406,3.896 0.458,0.198 10 false GND 1.281,3.979 1.438,4.177 0.156,0.198 10 false A 0.406,0.479 0.719,0.677 0.313,0.198 10 false *a 0.448,2.458 0.76,2.656 0.313,0.198 10 false *b 0.792,3.375 0.948,3.573 0.156,0.198 10 false B
*a Component with harness connected
(Combination Meter Assembly)
*b Waveform


a.

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

Item Condition
Tester connection I4-8 (+S) - Body ground
Tool setting 5 V/DIV., 20 ms./DIV.
Condition Ignition switch ON, wheel being rotated

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.

·

The waveform (B) changes depending on the connected ECUs.




Result:
Result Proceed to
The measured waveform is similar to that in the illustration A
The measured waveform is not similar to that in the illustration
(Stuck low) 		B
The measured waveform is not similar to that in the illustration
(Stuck high) 		C



A

3.CHECK HARNESS AND CONNECTOR (EACH ECU - COMBINATION METER ASSEMBLY)

B

4.INSPECT EACH ECU (INTERNAL SHORT)

C

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


3.CHECK HARNESS AND CONNECTOR (EACH ECU - COMBINATION METER ASSEMBLY)
a.

Disconnect the A142 ECM*1 connector.


b.

Disconnect the I187 navigation receiver assembly*2 connector.


c.

Disconnect the I210 radio and display receiver assembly*3 connector.


d.

Disconnect the I5 combination meter assembly connector.


e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A142-93 (SPD) - I4-8 (+S)*1 Always Below 1 Ω
I187-8 (SPD) - I4-8 (+S)*2 Always Below 1 Ω
I210-8 (SPD) - I4-8 (+S)*3 Always Below 1 Ω


*1: for Gasoline Model

*2: for Navigation Receiver Type

*3: for Radio and Display Type



Result:
Proceed to
OK
NG



OK

CHECK THE VOLTAGE AT TERMINAL SPD OF EACH ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT EACH ECU (INTERNAL SHORT)
a.

Disconnect one of the connectors below.

NOTICE:

After disconnecting a connector, perform all steps with all other ECUs connected.


Connector ECU
A142*1 ECM
I187*2 Navigation receiver assembly
I210*3 Radio and display receiver assembly

*1: for Gasoline Model

*2: for Navigation Receiver Type

*3: for Radio and Display Type



b.
E436102C25
1.469,0.177 1.917,0.438 0.448,0.26 2.667,1.708 2.49,1.083 true 1.635,0.219 2.094,0.417 0.458,0.198 10 false I4 2.594,1.75 2.906,1.948 0.313,0.198 10 false +S 0.271,0.313 0.583,0.51 0.313,0.198 10 false *a
*a Component with harness connected
(Combination Meter Assembly)


Measure the voltage according to the value(s) in the table below.

NOTICE:

Make sure to perform this inspection with the wheels stopped.


Standard Voltage:
Tester Connection Condition Specified Condition
I4-8 (+S) - Body ground Ignition switch ON 4.5 to 14 V



c.

Repeat steps (a) and (b) for each connected ECU.

HINT:

If the voltage changed to the specified voltage after disconnecting a connector, an internal short in the disconnected ECU is suspected.



Result:
Result Proceed to
After performing the inspection procedure for all connectors, the voltage did not change to the specified voltage A
When disconnecting the connector of the ECM, the voltage changed to the specified voltage
(for Gasoline Model) 		B
When disconnecting the connector of the navigation receiver assembly, the voltage changed to the specified voltage
(for Navigation Receiver Type) 		C
When disconnecting the connector of the radio and display receiver assembly, the voltage changed to the specified voltage
(for Radio and Display Type) 		D



A

5.CHECK HARNESS AND CONNECTOR (EACH ECU - COMBINATION METER ASSEMBLY)

B

REPLACE ECM

for M15B-FKS: Click hereEngine / Hybrid System>M15B-FKS (ENGINE CONTROL)>ECM>REMOVAL

for M15C-FKS: Click hereEngine / Hybrid System>M15C-FKS (ENGINE CONTROL)>ECM>REMOVAL

for M20A-FKS: Click hereEngine / Hybrid System>M20A-FKS (ENGINE CONTROL)>ECM>REMOVAL

for M20C-FKS: Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>ECM>REMOVAL

for M20E-FKS: Click hereEngine / Hybrid System>M20E-FKS (ENGINE CONTROL)>ECM>REMOVAL


C

REPLACE NAVIGATION RECEIVER ASSEMBLY

Click hereAudio / Visual / Telematics>NAVIGATION / MULTI INFO DISPLAY>NAVIGATION RECEIVER>REMOVAL


D

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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


5.CHECK HARNESS AND CONNECTOR (EACH ECU - COMBINATION METER ASSEMBLY)
a.

Disconnect the A142 ECM*1 connector.


b.

Disconnect the I187 navigation receiver assembly*2 connector.


c.

Disconnect the I210 radio and display receiver assembly*3 connector.


d.

Disconnect the I4 combination meter assembly connector.


e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A142-93 (SPD)*1, I187-8 (SPD)*2 or I210-8 (SPD)*3 - I4-8 (+S) Always Below 1 Ω
A142-93 (SPD)*1, I187-8 (SPD)*2, I210-8 (SPD)*3 or I4-8 (+S) - Body ground Always 10 kΩ or higher


*1: for Gasoline Model

*2: for Navigation Receiver Type

*3: for Radio and Display Type



Result:
Proceed to
OK
NG



OK

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK FOR DTC (SMART ENTRY AND START SYSTEM (FOR START FUNCTION))
a.

Check if smart entry and start system (for start function) DTCs are output.

Body Electrical > Power Source Control > Trouble Codes
50001 223

Result:
Result Proceed to
DTCs are not output A
DTCs are output B



A

7.INSPECT COMBINATION METER ASSEMBLY

B

GO TO SMART ENTRY AND START SYSTEM (FOR START FUNCTION)

for HV Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, HV Model)>DIAGNOSTIC TROUBLE CODE CHART

for Gasoline Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (except NR Series))>DIAGNOSTIC TROUBLE CODE CHART


7.INSPECT COMBINATION METER ASSEMBLY
HINT:

This procedure is performed to check the diode inside the combination meter assembly.


a.

Remove the combination meter assembly.

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


b.

Measure the internal resistance of the combination meter assembly.

Standard Resistance:
Tester Connection Tester Connection Condition Measured Value
I4-6 (IG+) - I4-25 (SI)
·

Positive (+) tester probe → I4-6 (IG+)

·

Negative (-) tester probe → I4-25 (SI)


Always A
I4-6 (IG+) - I4-25 (SI)
·

Positive (+) tester probe → I4-25 (SI)

·

Negative (-) tester probe → I4-6 (IG+)


Always B



OK:

There is a large difference between the measured value (A) and the measured value (B).


Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY)

NG

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY)
a.

Disconnect the I196 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the I4 combination meter assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I196-28 (SPDO) - I4-25 (SI) Always Below 1 Ω
I196-28 (SPDO) or I4-25 (SI) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK FOR DTC (SMART ENTRY AND START SYSTEM (FOR START FUNCTION))
a.

Check if smart entry and start system (for start function) DTCs are output.

Body Electrical > Power Source Control > Trouble Codes
50001 223

Result:
Result Proceed to
DTCs are not output A
DTCs are output B



A

10.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY)

B

GO TO SMART ENTRY AND START SYSTEM (FOR START FUNCTION)

for HV Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, HV Model)>DIAGNOSTIC TROUBLE CODE CHART

for Gasoline Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (except NR Series))>DIAGNOSTIC TROUBLE CODE CHART


10.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY)
a.

Disconnect the I196 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the I4 combination meter assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I196-28 (SPDO) - I4-25 (SI) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR