Infiniti FX35, FX50 (S51). Manual - part 1817

P0717 INPUT SPEED SENSOR A

TM-75

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

C

E

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A

B

TM

N

O

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YES

>> Replace A/T assembly. Refer to 

TM-181, "2WD : Exploded View"

 (2WD), 

TM-184, "AWD :

Exploded View"

 (AWD).

NO

>> Repair or replace damaged parts.

TM-76

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0720 OUTPUT SPEED SENSOR

P0720 OUTPUT SPEED SENSOR

Description

INFOID:0000000005250039

The output speed sensor detects the revolution of the parking gear and emits a pulse signal. The pulse signal
is transmitted to the TCM which converts it into vehicle speed.

DTC Logic

INFOID:0000000005250040

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

• Always drive vehicle at a safe speed.
• Be careful not to rev engine into the red zone on the tachometer.

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “ESTM VSP SIG” in “Data Monitor” in “TRANSMISSION”

3.

Drive vehicle and maintain the following conditions for 60 seconds or more.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”.
Is “P0720” detected?

YES

>> Go to 

TM-77, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0720

Output Speed Sensor Circuit

• The vehicle speed detected 

by the output speed sensor is 
5 km/h (3MPH) or less when 
the vehicle speed transmitted 
from the unified meter and A/
C amp. to TCM is 20 km/h or 
more. (Only when starts after 
the ignition switch is turned 
ON.)

• The vehicle speed transmit-

ted from the unified meter 
and A/C amp. to TCM does 
not decrease despite the 36 
km/h (23 MPH) or more of de-
celeration in vehicle speed 
detected by the output speed 
sensor. when the vehicle 
speed detected by the output 
speed sensor is 36 km/h (23 
MPH) or more and the vehicle 
speed transmitted from the 
unified meter and A/C amp. to 
TCM is 24 (15 MPH) or more.

• Harness or connectors

(Sensor circuit is open.)

• Output speed sensor

ESTM VSP SIG

: 40 km/h (25 MPH) or more

P0720 OUTPUT SPEED SENSOR

TM-77

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Diagnosis Procedure

INFOID:0000000005250041

1.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to 

TM-181, "2WD : Exploded View"

 (2WD), 

TM-184, "AWD :

Exploded View"

 (AWD).

NO

>> Repair or replace damaged parts.

TM-78

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0725 ENGINE SPEED

P0725 ENGINE SPEED

Description

INFOID:0000000005250042

The engine speed signal is transmitted from the ECM to the TCM with CAN communication line.

DTC Logic

INFOID:0000000005250043

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “SLCT LVR POSI” and “VHCL/S SE-A/T” in “Data Monitor” in “TRANSMISSION”.

3.

Drive vehicle and maintain the following conditions for 5 seconds or more.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0725” detected?

YES

>> Go to 

TM-78, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250044

1.

CHECK DTC OF ECM

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Results” in “ENGINE”.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check DTC detected item. Refer to 

EC-124, "CONSULT-III Function"

.

2.

CHECK DTC OF TCM

 With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is any DTC other than “P0725” detected?

YES

>> GO TO 3.

NO

>> Check DTC detected item. Refer to 

TM-62, "CONSULT-III Function (TRANSMISSION)"

.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0725

Engine Speed Input Circuit

• TCM does not receive the 

CAN communication signal 
from the ECM.

• The engine speed is more 

less 150 rpm even if the vehi-
cle speed is more than 10 km/
h (7 MPH).

Harness or connectors
(ECM to TCM circuit is open or 
shorted.)

SLCT LVR POSI

: D

VHCL/S SE-A/T

: More than 10km/h (7 MPH)