RM35X0E _58 Vehicle Interior _078337 METER / GAUGE / DISPLAY _0379907 METER / GAUGE SYSTEM J

METER / GAUGE / DISPLAY  METER / GAUGE SYSTEM  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 brake actuator assembly (skid control ECU) which uses this information to create the vehicle speed signal*a. The vehicle speed signal consists of pulses sent to the combination meter assembly from the brake actuator assembly (skid control ECU). To create this signal, 12 V is output from IG2 which is behind a resistor in the combination meter assembly. This voltage is sent to the brake actuator assembly (skid control ECU). The pulse signal is created by switching the transistor in the brake actuator assembly (skid control ECU) 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 brake actuator assembly (skid control ECU). 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.

*a: This vehicle speed signal is created by the brake actuator assembly (skid control ECU). There is no actual component that is referred to as the vehicle speed sensor. In addition, for some systems, vehicle speed information may be received via CAN communication.


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.


WIRING DIAGRAM

B620504
0.542,1.25 2.229,1.448 1.688,0.198 10 false A28 0.552,1.396 3.385,1.729 2.833,0.333 10 false Brake Actuator Assembly (Skid Control ECU) 1.813,0.479 3.5,0.677 1.688,0.198 10 false 2 1.406,0.479 1.865,0.677 0.458,0.198 10 false SP1 5.479,0.604 5.938,0.802 0.458,0.198 10 false SI 5.177,0.479 5.635,0.677 0.458,0.198 10 false 20 5.469,2.552 5.927,2.75 0.458,0.198 10 false +S 5.188,2.438 5.646,2.635 0.458,0.198 10 false 36 1.813,2.438 2.781,2.719 0.969,0.281 10 false 24*1, 10*2 1.417,2.438 1.875,2.635 0.458,0.198 10 false SPD 0.448,2.865 1.448,3.167 1,0.302 10 false N1*1, N2*2 0.438,3.031 3.51,3.604 3.073,0.573 10 false ECM 0.438,4.479 0.896,4.677 0.458,0.198 10 false O12 0.427,4.677 3.5,5.167 3.073,0.49 10 false Radio Receiver Assembly*3 5.396,4.49 5.854,4.688 0.458,0.198 10 false O9 5.396,4.615 6.854,5.125 1.458,0.51 10 false Navigation ECU*4 1.406,4.052 1.865,4.25 0.458,0.198 10 false SPD 5.458,4.052 5.917,4.25 0.458,0.198 10 false SPD 5.302,4.042 5.76,4.24 0.458,0.198 10 false 9 1.802,4.042 2.26,4.24 0.458,0.198 10 false 17 1.427,5.625 1.885,5.823 0.458,0.198 10 false SPD 5.469,5.625 5.958,5.823 0.49,0.198 10 false SPD 1.844,5.604 2.302,5.802 0.458,0.198 10 false 27 5.198,5.594 5.656,5.792 0.458,0.198 10 false 11 0.5,6.01 2.219,6.531 1.719,0.521 10 false O5 5.146,2.885 5.604,3.083 0.458,0.198 10 false N22 5.146,3.083 7.073,3.552 1.927,0.469 10 false Combination Meter Assembly 0.156,7.885 2.927,8.26 2.771,0.375 10 false *1: for 7GR-FKS 0.167,8.219 2.938,8.594 2.771,0.375 10 false *2: for 1GD-FTV 0.49,6.167 3.198,6.708 2.708,0.542 10 false Radio and Display Receiver Assembly*5 2,8.208 4.323,8.625 2.323,0.417 10 false *5: for Radio and Display Type 2.01,7.875 4.771,8.208 2.76,0.333 10 false *4: w/ Navigation System 0.156,8.542 2.969,8.813 2.813,0.271 10 false *3: for Radio Receiver Type 0.281,7.5 3.458,8.031 3.177,0.531 10 false Certification ECU (Smart Key ECU Assembly)*7 0.281,7.375 2,7.896 1.719,0.521 10 false N156 1.417,7.031 1.875,7.229 0.458,0.198 10 false SPD 1.813,7.031 2.271,7.229 0.458,0.198 10 false 19 4.635,6.24 7.156,6.875 2.521,0.635 10 false Stereo Component Amplifier Assembly*8 4.635,6.104 5.094,6.302 0.458,0.198 10 false N169 4.156,7.875 6.917,8.208 2.76,0.333 10 false *7: w/ Entry and Start System 2,8.531 4.76,8.865 2.76,0.333 10 false *6: for 12 Speakers

CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the ECM refer to the Service Bulletin.

·

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.



PROCEDURE

1.CHECK ECU TERMINAL VOLTAGE (INPUT VOLTAGE)
C406366C20
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.573,0.188 1.885,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


a.

Disconnect the combination meter assembly connector.


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If any of the ECUs specified in the wiring diagram supplies power to the combination meter assembly, the combination meter assembly will output a waveform.



Result:
Proceed to
OK
NG



OK

2.CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)

NG

5.CHECK HARNESS AND CONNECTOR (EACH ECU - COMBINATION METER ASSEMBLY)
2.CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)
C414210C03
1.5,0.667 1.917,0.917 0.417,0.25 1.01,1.917 0.583,0.833 0.583,0.833 0.417,0.833 true 1.573,0.719 2.031,0.917 0.458,0.198 10 false A28 0.125,0.75 0.583,0.948 0.458,0.198 10 false SP1 0.115,0.083 0.573,0.281 0.458,0.198 10 false *a
*a Front view of wire harness connector
(to Brake Actuator Assembly [Skid Control ECU])


a.

Disconnect the brake actuator assembly (skid control ECU) connector.


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A28-2 (SP1) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (INPUT WAVEFORM)

NG

4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU])
3.CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (INPUT WAVEFORM)
E391284C11
1.448,0.438 1.865,0.667 0.417,0.229 1.031,1.323 0.521,1.042 0.521,1.042 0.344,1.042 true 1.531,0.479 1.844,0.677 0.313,0.198 10 false N22 0.146,0.927 0.458,1.125 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 0.177,0.24 0.49,0.438 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 input waveform.

i.

Remove the combination meter assembly with the connector(s) still connected.

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


ii.

Connect an oscilloscope to terminal N22-20 (SI) and body ground.


iii.

Turn the ignition switch to ON.


iv.

Turn a wheel slowly.


v.

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

Item Condition
Tester connection N22-20 (SI) - Body ground
Tool setting 5 V/DIV., 20 ms./DIV.
Condition Ignition switch ON, 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 COMBINATION METER ASSEMBLY

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


NG

REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL


4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU])
a.

Disconnect the N22 combination meter assembly connector.


b.

Disconnect the A28 brake actuator assembly (skid control ECU) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N22-20 (SI) - A28-2 (SP1) Always Below 1 Ω
N22-20 (SI) or A28-2 (SP1) - Body ground Always 10 kΩ or higher



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

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

*1: for 7GR-FKS

*2: for 1GD-FTV

*3: for Radio Receiver Type

*4: w/ Navigation System

*5: for Radio and Display Type

*6: w/ Entry and Start System

*7: for 12 Speakers


a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the N1*1 or N2*2 ECM connector.


c.

Disconnect the O12 radio receiver assembly connector.*3


d.

Disconnect the O9 navigation ECU connector.*4


e.

Disconnect the O5 radio and display receiver assembly connector.*5


f.

Disconnect the N169 stereo component amplifier assembly connector.*7


g.

Disconnect the N156 certification ECU (smart key ECU assembly) connector.*6


h.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N22-36 (+S) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK VEHICLE TYPE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK VEHICLE TYPE
a.

Check vehicle condition.


Result:
Result Proceed to
for Radio and Display Type A
except Radio and Display Type B



A

7.CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

B

8.CHECK VEHICLE TYPE
7.CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY
a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the O5 radio and display receiver assembly connector.


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If the result is as specified, there may be a short circuit in the radio and display receiver assembly.



Result:
Proceed to
OK
NG



OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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


NG

8.CHECK VEHICLE TYPE
8.CHECK VEHICLE TYPE
a.

Check vehicle condition.


Result:
Result Proceed to
w/ Navigation System A
w/o Navigation System B



A

9.CHECK NAVIGATION ECU

B

10.CHECK VEHICLE TYPE
9.CHECK NAVIGATION ECU
a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the O9 navigation ECU connector.


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If the result is as specified, there may be a short circuit in the navigation ECU.



Result:
Proceed to
OK
NG



OK

REPLACE NAVIGATION ECU

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


NG

10.CHECK VEHICLE TYPE
10.CHECK VEHICLE TYPE
a.

Check vehicle condition.


Result:
Result Proceed to
for 12 Speakers A
except 12 Speakers B



A

11.CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

B

12.CHECK VEHICLE TYPE
11.CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY
a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the N169 stereo component amplifier assembly connector.


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If the result is as specified, there may be a short circuit in the stereo component amplifier assembly.



Result:
Proceed to
OK
NG



OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>STEREO COMPONENT AMPLIFIER>REMOVAL


NG

12.CHECK VEHICLE TYPE
12.CHECK VEHICLE TYPE
a.

Check vehicle condition.


Result:
Result Proceed to
w/ Entry and Start System A
w/o Entry and Start System B



A

13.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B

14.CHECK VEHICLE TYPE
13.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the N156 certification ECU (smart key ECU assembly) connector.


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If the result is as specified, there may be a short circuit in the certification ECU (smart key ECU assembly).



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

14.CHECK VEHICLE TYPE
14.CHECK VEHICLE TYPE
a.

Check vehicle condition.


Result:
Result Proceed to
for Radio Receiver Type A
except Radio Receiver Type B



A

15.CHECK RADIO RECEIVER ASSEMBLY

B

REPLACE ECM

for 7GR-FKS:

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL

for 1GD-FTV:

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECM>REMOVAL


15.CHECK RADIO RECEIVER ASSEMBLY
a.
C406366C21
1.5,0.125 1.885,0.385 0.385,0.26 2.552,1.385 2.917,1.792 2.917,1.792 3.083,1.792 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.563,0.188 1.875,0.344 0.313,0.156 10 false N22 3.146,1.677 3.417,1.906 0.271,0.229 10 false +S
*a Front view of wire harness connector
(to Combination Meter Assembly)


Disconnect the combination meter assembly connector.


b.

Disconnect the O12 radio receiver assembly connector.


c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N22-36 (+S) - Body ground Ignition switch ON 11 to 14 V


HINT:

If the result is as specified, there may be a short circuit in the radio receiver assembly.



Result:
Proceed to
OK
NG



OK

REPLACE RADIO RECEIVER ASSEMBLY

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


NG

REPLACE ECM

for 7GR-FKS:

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL

for 1GD-FTV:

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECM>REMOVAL