Nissan Altima L32. Manual - part 1503

TM-356

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1723 CVT SPEED SENSOR FUNCTION

YES

>> GO TO 3.

NO

>> 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-313, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system. Refer to 

TM-322, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-430, "Exploded View"

.

NO

>> Repair or replace damaged parts.

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

TM-357

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Description

INFOID:0000000004201950

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:0000000004201951

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:

If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1. Start engine and let it idle for 5 seconds.

2. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1726 ELEC TH CONTROL” detected?

YES

>> Go to 

TM-357, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201952

1.

CHECK DTC WITH ECM

With CONSULT-III

1. Turn ignition switch ON.

2. Select “SELF-DIAG RESULTS” mode for “ENGINE”.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check DTC Detected Item. Refer to 

EC-527, "DTC Index"

 (for California), 

EC-1015, "DTC Index"

(except for California).

2.

CHECK DTC WITH TCM

With CONSULT-III

Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1726 ELEC TH CONTROL” detected?

YES

>> Replace TCM. Refer to 

TM-430, "Exploded View"

.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-430, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1726

ELEC TH CONTROL

The electronically controlled throttle for ECM 
is malfunctioning.

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

TM-358

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1740 LOCK-UP SELECT SOLENOID VALVE

P1740 LOCK-UP SELECT SOLENOID VALVE

Description

INFOID:0000000004201953

• 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:0000000004201954

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.

Then wait at least 10 seconds before performing the next test.

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-358, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201955

1.

CHECK LOCK-UP SELECT SOLENOID VALVE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector.

3. Check resistance between TCM harness connector F16 terminal

37 and ground.

Is the inspection result normal?

YES 

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT SOLENOID VALVE) (PART 1)

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.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Lock-up select solenoid valve

RANGE

: “D” or “N” position

(At each time, wait for 5 seconds.)

TCM harness connector

Ground

Resistance (Ap-

prox.)

Connector

Terminal

F16

37

17.0 – 38.0 

Ω

AWDIA0146ZZ

P1740 LOCK-UP SELECT SOLENOID VALVE

TM-359

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

1. Disconnect CVT unit harness connector.

2. Check continuity between TCM harness connector F16 (A) ter-

minal 37 and CVT unit harness connector F46 (B) terminal 13.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT SOLENOID VALVE) (PART 2)

Check continuity between TCM harness connector F16 terminal 37

and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check lock-up select solenoid valve. Refer to 

TM-359, "Component Inspection (Lock-up Select Solenoid

Valve)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace transaxle assembly. Refer to 

TM-447, "Exploded View"

.

5.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-430, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Lock-up Select Solenoid Valve)

INFOID:0000000004201956

1.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check resistance between CVT unit terminal 13 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-447,

"Exploded View"

.

TCM harness connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F16 (A)

37

F46 (B)

13

Existed

AWDIA0147ZZ

TCM harness connector

Ground

Continuity

Connector

Terminal

F16

37

Not existed

AWDIA0146ZZ

CVT unit terminal

Ground

Resistance (Approx.)

13

17.0 – 38.0 

Ω

AWDIA0119ZZ