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Infiniti G35 (V35) Sedan. Manual - part 1359

TM-128

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

Description

INFOID:0000000000957026

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

DTC Logic

INFOID:0000000000957027

DTC DETECTION LOGIC

*: This is an OBD-II self-diagnostic item.

DTC COMFIRMATION PROCEDURE

CAUTION:

• Always drive vehicle at a safe speed.
• Be careful not to rev engine into the red zone on the tachometer.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

CHECK REVOLUTION SENSOR AND VEHICLE SPEED SENSOR MTR

With CONSULT-III

Start the engine.

Select “DATA MONITOR”.

Drive vehicle and check for an increase of “VHCL/S SE-A/T” value in response to “VHCL/S SE-MTR”
value.

Are “VHCL/S SE-A/T” and “VHCL/S SE-MTR” values correct?

YES

>> GO TO 2.

>> Go to

TM-129, "Diagnosis Procedure"

CHECK DTC DETECTION 1

With CONSULT-III

Select “DATA MONITOR”.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

DTC

Item

(CONSULT-III screen

terms)

A/T CHECK indicator
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P0720*

VEH SPD SEN/CIR AT

1st

• Signal from vehicle

speed sensor A/T
(revolution sensor) not
input due to cut line or
the like.

• Unexpected signal in-

put during running.

• After ignition switch is

turned ON, unexpect-
ed signal input from
vehicle speed sensor
MTR before the vehi-
cle starts moving.

• Harness or connectors

(Sensor circuit is open
or shorted.)

• Revolution sensor
• Vehicle speed sensor

MTR

VHCL/S SE-A/T

: Approximately matches the speed meter reading.

VHCL/S SE-MTR

: Approximately matches the speed meter reading.

VHCL/S SE-A/T

: 30 km/h (19 MPH) or more

ACCELE POSI

: More than 1.0/8

P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

TM-129

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

With GST

Follow the procedure “With CONSULT-III”.

Is “P0720 VEH SPD SEN/CIR AT” detected?

YES

>> Go to

TM-129, "Diagnosis Procedure"

>> GO TO 3.

CHECK DTC DETECTION 2

With CONSULT-III

Select “DATA MONITOR”.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0720 VEH SPD SEN/CIR AT” detected?

YES

>> Go to

TM-129, "Diagnosis Procedure"

>> Check Intermittent incident. Refer to

GI-39, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000000957028

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-168, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair or replace damaged parts.

CHECK SUB-HARNESS

Remove control valve with TCM. Refer to

TM-240, "Exploded View"

Disconnect park/neutral position switch connector and TCM connector.

Check continuity between park/neutral position switch connector and TCM connector.

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

Reinstall any part removed.

Is the inspection result normal?

YES

>> GO TO 3.

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

REPLACE THE REVOLUTION SENSOR AND CHECK DTC

Replace the revolution sensor. Refer to

TM-262, "2WD : Exploded View"

(2WD) or

TM-281, "Exploded

View"

TM-291, "Disassembly"

(AWD).

Perform “DTC CONFIRMATION PROCEDURE”. Refer to

TM-128, "DTC Logic"

Is the inspection result normal?

SLCT LVR POSI

: “D” position

Drive location

: Driving the vehicle uphill (increased engine load) will help maintain the driving condi-
tions required for this test.

ACCELE POSI

: More than 1.0/8

ENGINE SPEED

: 3,500 rpm or more

SLCT LVR POSI

: “D” position

Drive location

: Driving the vehicle uphill (increased engine load) will help maintain the driving condi-
tions required for this test.

Park/neutral position switch connector

TCM connector

Continuity

Connector

Terminal

Connector

Terminal

F154

F152

Existed

TM-130

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)

YES

>> INSPECTION END

>> Replace the control valve with TCM. Refer to

TM-240, "Exploded View"

P0725 ENGINE SPEED SIGNAL

TM-131

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0725 ENGINE SPEED SIGNAL

Description

INFOID:0000000000957029

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

DTC Logic

INFOID:0000000000957030

DTC DETECTION LOGIC

*: This is an OBD-II self-diagnostic item.

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “DATA MONITOR”.

Drive vehicle and maintain the following conditions for at least 10 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0725 ENGINE SPEED SIG” detected?

YES

>> Go to

TM-131, "Diagnosis Procedure"

>> Check Intermittent incident. Refer to

GI-39, "Intermittent Incident"