Nissan Pathfinder (2006 year). Manual - part 18

DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT

AT-135

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2006 Pathfinder

Diagnostic Procedure

ECS00EHO

1. 

CHECK A/T FLUID TEMPERATURE SENSOR 1 SIGNAL

 With CONSULT-II

1.

Start engine.

2.

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

3.

Read out the value of “ATF TEMP SE 1”.

OK or NG

OK >> GO 

TO 

2.

NG

>> GO TO 3.

2. 

CHECK A/T FLUID TEMPERATURE SENSOR 2 SIGNAL

 With CONSULT-II

1.

Start engine.

2.

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

3.

Read out the value of “ATF TEMP SE 2”.

OK or NG

OK >> GO 

TO 

8.

NG

>> GO TO 5.

3. 

CHECK A/T FLUID TEMPERATURE SENSOR 1 

Check A/T fluid temperature sensor 1. Refer to 

AT-137, "A/T FLUID TEMPERATURE SENSOR 1"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Replace the control valve with TCM. Refer to 

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

 .

4. 

CHECK SUB-HARNESS

1.

Disconnect park/neutral position switch connector and TCM connector.

2.

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

3.

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

OK or NG

OK

>> GO TO 7.

NG

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

PCIA0039E

PCIA0039E

Item

 Connector

Terminal

Continuity

Park/neutral position 
switch connector

F505

6

Yes

TCM connector 

F503

19

Park/neutral position 
switch connector

F505

7

Yes

TCM connector 

F503

18

SCIA5461E

AT-136

DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT

2006 Pathfinder

5. 

CHECK A/T FLUID TEMPERATURE SENSOR 2 

Check A/T fluid temperature sensor 2. Refer to 

AT-137, "A/T FLUID TEMPERATURE SENSOR 2"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace the A/T fluid temperature sensor 2. Refer to 

AT-240, "A/T FLUID TEMPERATURE SEN-

SOR 2 REMOVAL AND INSTALLATION"

 .

6. 

CHECK TERMINAL CORD ASSEMBLY

1.

Disconnect A/T fluid temperature sensor 2 connector and TCM connector.

2.

Check continuity between A/T fluid temperature sensor 2 con-
nector terminals and TCM connector terminals.

3.

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

OK or NG

OK

>> GO TO 7.

NG

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

7. 

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

1.

Check TCM power supply and ground circuit. Refer to 

AT-173, "MAIN POWER SUPPLY AND GROUND

CIRCUIT"

 .

2.

Reinstall any part removed.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

 .

NG

>> Repair or replace damaged parts.

8. 

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to 

AT-133, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 1.

Item

 Connector

Terminal

Continuity

A/T fluid temperature sen-
sor 2 connector

F507

1

Yes

TCM connector 

F502

3

A/T fluid temperature sen-
sor 2 connector

F507

2

Yes

TCM connector 

F502

5

SCIA5462E

DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT

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2006 Pathfinder

Component Inspection

ECS00EHP

A/T FLUID TEMPERATURE SENSOR 1

1.

Remove control valve with TCM. Refer to 

AT-233, "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-233,

"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-240, "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-

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

 .

Name

Terminal

Temperature 

°

C 

(

°

F)

Resistance 

(Approx.)

A/T fluid temperature sen-
sor 1

6 - 7

0 (32)

15 k

Ω

20 (68)

6.5 k

Ω

80 (176)

0.9 k

Ω

SCIA5463E

Name

Terminal

Temperature 

°

C 

(

°

F)

Resistance 

(Approx.)

A/T fluid temperature 
sensor 2

1 - 2

0 (32)

10 k

Ω

20 (68)

4 k

Ω

80 (176)

0.5 k

Ω

SCIA5271E

AT-138

DTC P1721 VEHICLE SPEED SENSOR MTR

2006 Pathfinder

DTC P1721 VEHICLE SPEED SENSOR MTR

PFP:24814

Description

ECS00EHW

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

ECS00EHX

On Board Diagnosis Logic

ECS00EHY

●

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

●

Diagnostic trouble code “P1721 VHE SPD SE·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

ECS00EHZ

Harness or connectors
(The sensor circuit is open or shorted.)

DTC Confirmation Procedure

ECS00EI0

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 “DATA MONITOR” mode for “A/T” with CONSULT-II.

3.

Start engine and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POS: 1/8 or less
VHCL SPEED SE: 30 km/h (17 MPH) or more

4.

If DTC is detected, go to 

AT-139, "Diagnostic Procedure"

 .

Item name

Condition 

Display value (km/h)

VHCL/S SE·MTR

During driving

Approximately matches the speedometer reading.

BCIA0030E

DTC P1721 VEHICLE SPEED SENSOR MTR

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2006 Pathfinder

Diagnostic Procedure

ECS00EI1

1. 

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis. Refer to 

AT-90, "SELF-DIAGNOSTIC RESULT MODE"

 .

Is malfunction in the CAN communication indicated in the result?

YES

>> Check CAN communication line. Refer to 

AT-103, "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-19, "How to Proceed With Trouble Diagnosis"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to 

AT-138, "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-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

 .

NG

>> Repair or replace damaged parts.

SCIA2148E

AT-140

DTC P1730 A/T INTERLOCK

2006 Pathfinder

DTC P1730 A/T INTERLOCK

PFP:00000

Description

ECS00EI2

●

Fail-safe function to detect interlock conditions.

On Board Diagnosis Logic

ECS00EI3

●

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

ECS00EI4

●

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

●

Low coast brake solenoid valve

●

ATF pressure switch 2

DTC Confirmation Procedure

ECS00EI5

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 “DATA MONITOR” mode for “A/T” with CONSULT-II.

3.

Start engine.

4.

Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
Selector lever: “D” position 

5.

If DTC is detected, go to 

AT-141, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II”.

BCIA0030E

DTC P1730 A/T INTERLOCK

AT-141

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2006 Pathfinder

Judgement of A/T Interlock

ECS00EI6

When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd gear, and should be set
in a condition in which it can travel.
When one of the following fastening patterns is detected, the fail-safe function in correspondence with the indi-
vidual pattern should be performed.

A/T INTERLOCK COUPLING PATTERN TABLE

●

: NG, X: OK

Diagnostic Procedure

ECS00EI7

1. 

SELF-DIAGNOSIS

 With CONSULT-II

1.

Drive vehicle.

2.

Stop vehicle and turn ignition switch OFF.

3.

Turn ignition switch ON.

4.

Select “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.

 OK or NG

OK

>> GO TO 2.

NG

>> Check low coast brake solenoid valve circuit and function. Refer to 

AT-161, "DTC P1772 LOW

COAST BRAKE SOLENOID VALVE"

 , 

AT-163, "DTC P1774 LOW COAST BRAKE SOLENOID

VALVE FUNCTION"

 .

2. 

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to 

AT-140, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

3. 

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 4.

NG

>> Repair or replace damaged parts.

Gear position

ATF pressure switch output

Fail-safe 

function

Clutch pressure output pattern after fail-safe func-

tion

SW3 

(I/C)

SW6 

(HLR/

C)

SW5 

(D/C)

SW1 

(FR/B)

SW2 

(LC/B)

I/C

HLR/C

D/C

FR/B

LC/B

L/U

A/T interlock 
coupling pat-
tern

3rd

–

X

X

–

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

4th

–

X

X

–

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

5th

X

X

 –

X

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

SCIA5304E

AT-142

DTC P1730 A/T INTERLOCK

2006 Pathfinder

4. 

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-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

 .

NG

>> Repair or replace damaged parts.