Nissan Qashqai (2007-2010). Manual - part 584

P1723 CVT SPEED SENSOR FUNCTION

TM-271

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

YES

>> Repair or replace damaged parts. (Check the step motor function. Refer to 

TM-278, "DTC Logic"

.)

NO

>> GO TO 2.

2.

CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM

Check output speed sensor (secondary speed sensor) system. Refer to 

TM-234, "DTC Logic"

.

Is the inspection result normal?

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM

Check input speed sensor (primary speed sensor) system. Refer to 

TM-231, "DTC Logic"

.

Is the inspection result normal?

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4.

CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system. Refer to 

TM-237, "DTC Logic"

.

Is the inspection result normal?

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts. Refer to 

EC-929, "Description"

 (WITH EURO-OBD), 

EC-1208,

"Description"

 (WITHOUT EURO-OBD).

5.

CHECK TCM

Check TCM input/output signals. Refer to 

TM-285, "Reference Value"

.

Is the inspection result normal?

OK

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NG

>> Replace the TCM. Refer to 

TM-325, "Exploded View"

.

TM-272

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Description

INFOID:0000000000988722

Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN
communication.

DTC Logic

INFOID:0000000000988723

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

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.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Start engine and let it idle for 5 seconds.

3.

Perform “SELF-DIAG RESULTS”. Refer to 

TM-216, "CONSULT-III Function (TRANSMISSION)"

.

Is “P1726 ELEC TH CONTROL” detected?

YES

>> Go to 

TM-272, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000000988724

1.

CHECK DTC WITH ECM 

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “SELF-DIAG RESULTS” mode for “ENGINE” with CONSULT-III. Refer to 

EC-719, "CONSULT-III

Function"

 (WITH EURO-OBD), 

EC-1054, "CONSULT-III Function"

 (WITHOUT EURO-OBD).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check the DTC Detected Item. Refer to 

EC-719, "CONSULT-III Function"

 (WITH EURO-OBD),

EC-1054, "CONSULT-III Function"

 (WITHOUT EURO-OBD).

2.

CHECK TCM

Check TCM input/output signals. Refer to 

TM-285, "Reference Value"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace TCM. Refer to 

TM-325, "Exploded View"

.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1726

ELEC TH CONTROL

The electronically controlled 
throttle for ECM is malfunction-
ing.

Harness or connectors
(Sensor circuit is open or short-
ed.)

P1740 LOCK-UP SELECT SOLENOID VALVE

TM-273

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1740 LOCK-UP SELECT SOLENOID VALVE

Description

INFOID:0000000000988725

• Lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake

pressure).

• When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.

DTC Logic

INFOID:0000000000988726

DTC DETECTION LOGIC

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.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR”.

3.

Start engine and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P1740 LU-SLCT SOL/CIRC” detected?

YES

>> Go to 

TM-273, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000000988727

1.

CHECK LOCK-UP SELECT SOLENOID VALVE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check resistance between TCM connector terminal and ground.

Is the inspection result normal?

YES 

>> GO TO 4.

NO

>> GO TO 2.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1740

LU-SLCT SOL/CIRC

• Normal voltage not applied to 

solenoid due to cut line, 
short, or the like.

• TCM detects as irregular by 

comparing target value with 
monitor value.

• Lock-up select solenoid valve
• Harness or connectors

(Solenoid circuit is open or 
shorted.)

RANGE

: “D” position and “N” positions

(At each time, wait for 5 seconds.)

TCM connector

Ground

Resistance (Approx.)

Connector

Terminal

F25

37

17.0 – 38.0 

Ω

TM-274

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1740 LOCK-UP SELECT SOLENOID VALVE

2.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check lock-up select solenoid valve.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND LOCK-UP SELECT SOLENOID VALVE

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector and CVT unit harness connector.

3.

Check continuity between TCM connector terminal and CVT unit harness connector terminal.

4.

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

5.

Reinstall any part removed.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK TCM

Check TCM input/output signals. Refer to 

TM-285, "Reference Value"

. 

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace TCM. Refer to 

TM-325, "Exploded View"

.

Component Inspection

INFOID:0000000000988728

LOCK-UP SELECT SOLENOID VALVE

1.

LOCK-UP SELECT SOLENOID VALVE

1.

Turn ignition switch OFF.

2.

Disconnect CVT unit harness connector.

3.

Check resistance between CVT unit harness connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the transaxle assembly. Refer to 

TM-351, "2WD : Exploded View"

 (2WD), 

TM-354, "4WD

: Exploded View"

 (4WD).

TCM connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F25

37

F24

13

Existed

CVT unit harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

13

17.0 – 38.0 

Ω