Infiniti Q45. Manual - part 55

DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT

AT-133

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Component Inspection

NCS000WV

A/T FLUID TEMPERATURE SENSOR 1

1.

Remove control valve with TCM. Refer to 

AT-225, "Control Valve with TCM and A/T Fluid Temperature

Sensor 2"

 .

2.

Check resistance between terminals.

3.

If NG, replace the control valve with TCM. Refer to 

AT-225,

"Control Valve with TCM and A/T Fluid Temperature Sensor 2"

 .

A/T FLUID TEMPERATURE SENSOR 2

1.

Remove A/T fluid temperature sensor 2. Refer to 

AT-234, "A/T FLUID TEMPERATURE SENSOR 2

REMOVAL AND INSTALLATION"

 .

2.

Check resistance between terminals.

3.

If NG, replace the A/T fluid temperature sensor 2. Refer to 

AT-

234, "A/T FLUID TEMPERATURE SENSOR 2 REMOVAL AND
INSTALLATION"

 .

Name

Connector

Terminal

Temperature 

°

C (

°

F)

Resistance 

(Approx.)

A/T fluid temperature 
sensor 1

F505

6 - 7

0 (32)

15 k

Ω

20 (68)

6.5 k

Ω

80 (176)

0.9 k

Ω

SCIA5463E

Name

Connector

Terminal

Temperature 

°

C (

°

F)

Resistance 

(Approx.)

A/T fluid temperature 
sensor 2

F507

1 - 2

0 (32)

10 k

Ω

20 (68)

4 k

Ω

80 (176)

0.5 k

Ω

SCIA5271E

AT-134

DTC P1721 VEHICLE SPEED SENSOR MTR

DTC P1721 VEHICLE SPEED SENSOR MTR

PFP:24814

Description

NCS000X2

The vehicle speed sensor·MTR signal is transmitted from combination meter to TCM by CAN communication
line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM
will then use the vehicle speed sensor·MTR signal.

CONSULT-II Reference Value

NCS000X3

On Board Diagnosis Logic

NCS000X4

●

This is not an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1721 VHE SPD SE/CIR-MTR” with CONSULT-II is detected when TCM does
not receive the proper vehicle speed sensor MTR signal (input by CAN communication) from combination
meter.

Possible Cause

NCS000X5

Harness or connectors
(Sensor circuit is open or shorted.)

DTC Confirmation Procedure

NCS000X6

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.

 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.

Touch “START”.

4.

Start engine and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POSI: 1.0/8 or less
VHCL/S SE-MTR: 30 km/h (17 MPH) or more

5.

If DTC is detected, go to 

AT-135, "Diagnostic Procedure"

 .

Item name

Condition 

Display value

VHCL/S SE-MTR

During driving

Approximately matches the speedometer reading.

BCIA0031E

DTC P1721 VEHICLE SPEED SENSOR MTR

AT-135

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Diagnostic Procedure

NCS000X7

1. 

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis. Refer to 

AT-87, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-97, "Diagnostic Proce-

dure without CONSULT-II"

 .

Is malfunction in the CAN communication indicated in the result?

YES

>> Check CAN communication line. Refer to 

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 .

NO

>> GO TO 2.

2. 

CHECK INPUT SIGNAL

 With CONSULT-II

1.

Start engine.

2.

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

3.

Drive vehicle and read out the value of “VHCL/S SE-MTR”.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

CHECK COMBINATION METERS

Check combination meters. Refer to 

DI-7, "COMBINATION METERS"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to 

AT-134, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 5.

5. 

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

AT-173, "MAIN POWER SUPPLY AND GROUND CIR-

CUIT"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6. 

DETECT MALFUNCTIONING ITEM

Check the following.

●

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

AT-225, "Control Valve with TCM and A/T Fluid Tem-

perature Sensor 2"

 .

NG

>> Repair or replace damaged parts.

Item name

Condition 

Display value

VHCL/S SE-MTR

During driving

Approximately matches the 
speedometer reading.

SCIA2148E

AT-136

DTC P1730 A/T INTERLOCK

DTC P1730 A/T INTERLOCK

PFP:00000

Description

NCS000X8

Fail-safe function to detect interlock conditions.

On Board Diagnosis Logic

NCS000X9

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1730 A/T INTERLOCK” with CONSULT-II or 12th judgement flicker without
CONSULT-II is detected when TCM does not receive the proper voltage signal from the sensor and
switch.

●

TCM monitors and compares gear position and conditions of each ATF pressure switch when gear is
steady.

Possible Cause

NCS000XA

●

Harness or connectors
(Solenoid and switch circuit is open or shorted.)

●

Low coast brake solenoid valve

●

ATF pressure switch 2

DTC Confirmation Procedure

NCS000XB

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.

 WITH CONSULT-II

1.

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

2.

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

3.

Touch “START”.

4.

Start engine.

5.

Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
SLCT LVR POSI: “D” position 

6.

If DTC is detected, go to 

AT-137, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II”.

BCIA0031E