Infiniti M45 (Y34). Manual - part 58

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

AT-117

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AT

Wiring Diagram — AT — VSSA/T

ACS0047I

TCWA0112E

AT-118

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

TCM terminals and data are reference value. Measured between each terminal and ground.

Diagnostic Procedure

ACS0047J

1. 

CHECK INPUT SIGNALS

 With CONSULT-II

1.

Turn ignition switch ON. (Do not start engine.)

2.

Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.

3.

Start the engine.

4.

Read out the value of “VHCL/S SE·A/T” while driving.
Check the value changes according to driving speed.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 2.

2. 

CHECK REVOLUTION SENSOR

 With CONSULT-II

1.

Start the engine.

2.

Check the pulse when vehicle cruises.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 3.

Terminal   

No.

Wire 

color

Item

Condition

Data (Approx.)

12

Y/R

Power supply 
(out)

IGN ON

–

Battery voltage

IGN OFF

–

0V

27

Y/B

Vehicle speed 
sensor A/T (revo-
lution sensor)

When 

vehicle 
cruises

When running at 20 km/h (12MPH), use the CONSULT-II 
pulse frequency measuring function.

185 (Hz)

Item name

Condition 

Display value

VHCL/S SE·A/T

During driving

Approximately matches 
the speedometer reading.

PCIA0033E

Condition

Connector 

No.

Terminal No. 

(Wire color)

Data 

(Approx.)

When running at 20 km/h (12 MPH), use 
the CONSULT-II pulse frequency mea-
suring function.

CAUTION:

Connect the data link connector to the 
vehicle-side diagnosis connector.

F104

27 (Y/B)

185 (Hz)

PCIA0018E

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

AT-119

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3. 

CHECK HARNESS BETWEEN TCM AND A/T UNIT ASSEMBLY HARNESS CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check continuity between A/T unit assembly harness connector
and TCM connector.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

4. 

CHECK TERMINAL CORD ASSEMBLY

1.

Remove oil pan. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Disconnect A/T unit assembly harness connector and control valve assembly harness connector.

3.

Check continuity between A/T unit assembly harness connector
and control valve assembly harness connector.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

Item

Connector No.

Terminal No. 

(Wire color)

Continuity

TCM

F103

12 (Y/R)

Yes

A/T unit assembly harness 
connector

F26

1 (Y/R)

TCM

F104

27 (Y/B)

Yes

A/T unit assembly harness 
connector

F26

10 (Y/B)

SCIA3339E

Item

Connector No.

Terminal No. 

(Wire color)

Continuity

A/T unit assembly har-
ness connector

F26

1 (B)

Yes

Control valve assem-
bly harness connector

F302

8 (B)

A/T unit assembly har-
ness connector

F26

10 (R/Y)

Yes

Control valve assem-
bly harness connector

F302

9 (R/Y)

SCIA3064E

AT-120

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

5. 

DETECT MALFUNCTION ITEMS

1.

Check control valve assembly. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-342, "DISASSEMBLY"

 .

3.

Check revolution sensor. Refer to 

AT-342, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6. 

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to 

AT-116, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

7. 

CHECK TCM

1.

Check TCM input/output signal. Refer to 

AT-86, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.