Nissan Cube. Manual - part 975

TM-156

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F08B]

P1740 SELECT SOLENOID

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Lock-up select solenoid valve is malfunctioning. Replace transaxle assembly. Refer to 

TM-235,

"Exploded View"

.

CVT unit harness connector

Ground

Condition

Resistance (Approx.)

Connector

Terminal

F24

13

CVT fluid temperature: 20

°

C (68

°

F)

12.3 – 13.5 

Ω

CVT fluid temperature: 50

°

C (122

°

F)

13.7 – 15.1 

Ω

CVT fluid temperature: 80

°

C (176

°

F)

15.1 – 16.7 

Ω

P1777 STEP MOTOR

TM-157

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F08B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1777 STEP MOTOR

Description

INFOID:0000000009949034

• Step motor changes step by turning 4 coils ON or OFF according to signal from TCM.
• By changing step, step motor controls outward flow and inward flow of line pressure to primary pulley, deter-

mines the primary pulley position, and controls gear ratio.

DTC Logic

INFOID:0000000009949035

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine.

2.

Select “Data Monitor” in “TRANSMISSION”.

3.

Select “RANGE” and “VEHICLE SPEED”.

4.

Maintain the following conditions for 1 seconds or more.

5.

Stop the vehicle.

6.

Select “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT”.

Is “P1777” detected?

YES

>> Go to 

TM-157, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009949036

1.

CHECK STEP MOTOR CIRCUIT (PART 1)

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check resistance between TCM vehicle side harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P1777

Step Motor Circuit

• Step motor monitor value is OFF when step 

motor command value of TCM is ON

• Step motor monitor value is ON when step 

motor command value of TCM is OFF

• Harness or connectors

(Step motor circuit is open or shorted.)

• Step motor

RANGE

: D

VEHICLE SPEED

: More than 20 km/h (12 MPH)

TCM vehicle side harness connector

Resistance (Approx.)

Connector

Terminal

E18

11

12

30.0 

Ω

20

21

TM-158

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F08B]

P1777 STEP MOTOR

2.

CHECK STEP MOTOR CIRCUIT (PART 2)

Check resistance between TCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-40, "Intermittent Incident"

.

NO

>> GO TO 3.

3.

CHECK STEP MOTOR

1.

Disconnect CVT unit connector.

2.

Check step motor. Refer to 

TM-158, "Component Inspection (Step Motor)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Step motor is malfunctioning. Replace transaxle assembly. Refer to 

TM-235, "Exploded View"

.

4.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)

Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side harness
connector terminals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)

Check continuity between TCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-40, "Intermittent Incident"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Step Motor)

INFOID:0000000009949037

1.

CHECK STEP MOTOR (PART 1)

Check resistance between CVT unit harness connector terminals.

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

E18

11

15.0 

Ω

12

20

21

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

E18

11

F24

6

Existed

12

7

20

8

21

9

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

E18

11

Not existed

12

20

21

P1777 STEP MOTOR

TM-159

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F08B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Step motor is malfunctioning. Replace transaxle assembly. Refer to 

TM-235, "Exploded View"

.

2.

CHECK STEP MOTOR (PART 2)

Check resistance between CVT unit connector terminals and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Step motor is malfunctioning. Replace transaxle assembly. Refer to 

TM-235, "Exploded View"

.

CVT unit connector

Resistance (Approx.)

Connector

Terminal

F24

6

7

30.0 

Ω

8

9

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

6

15.0 

Ω

7

8

9