Nissan Frontier D22. Manual - part 85

DTC P0745 LINE PRESSURE SOLENOID VALVE

AT-309

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Diagnostic Procedure

ECS007N9

1. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch to OFF position.

2.

Disconnect terminal cord assembly connector in engine compartment.

3.

Check resistance between terminal cord assembly connector E72 terminal 4 and ground. Refer to the wir-
ing diagram.

Is resistance approx. 2.5 - 5

Ω?

Yes

>> GO TO 2.

No

>> 1. Remove control valve assembly.

Refer to 

AT-402, "REMOVAL"

 .

2. Check the following items:

–

Line pressure solenoid valve
Refer to 

AT-310, "LINE PRESSURE SOLENOID VALVE"

 .

–

Harness of terminal cord assembly for short or open

2. 

CHECK POWER SOURCE CIRCUIT

1.

Turn ignition switch to OFF position.

2.

Disconnect TCM harness connector.

3.

Check resistance between terminal cord assembly connector E72 terminal 4 and TCM harness connector
M77 terminal 2. Refer to the wiring diagram.

Is resistance approx. 12

Ω?

Yes

>> GO TO 3.

No

>> Check the following items:

●

Dropping resistor
Refer to

AT-310, "DROPPING RESISTOR"

 .

●

Harness for short or open between TCM terminal 2 and terminal cord assembly connector

3. 

CHECK POWER SOURCE CIRCUIT

1.

Turn ignition switch to OFF position.

2.

Check resistance between terminal cord assembly connector E72 terminal 4 and TCM harness connector
M77 terminal 1. Refer to the wiring diagram.

Is resistance approx. 0

Ω?

Yes

>> GO TO 4.

No

>> Repair or replace harness between TCM terminal 1 and terminal cord assembly.

4. 

CHECK DTC

Perform Diagnostic Trouble Code (DTC) confirmation procedure. Refer to 

AT-307, "DIAGNOSTIC TROUBLE

CODE (DTC) CONFIRMATION PROCEDURE"

 .

OK or NG

OK

>> INSPECTION END.

NG

>> 1. Perform TCM input/output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-310

[RE4R01A]

DTC P0745 LINE PRESSURE SOLENOID VALVE

Component Inspection

ECS007NA

LINE PRESSURE SOLENOID VALVE

●

For removal, refer to 

AT-402, "REMOVAL"

 .

Resistance Check

●

Check resistance between terminal 6 and ground.

Operation Check

●

Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal 6 and ground.

DROPPING RESISTOR

●

Check resistance between terminals 1 and 2.

SAT657I

Solenoid valve

Terminal No.

Resistance (Approx.)

Line pressure solenoid valve

6

Ground

2.5 - 5 

Ω 

SAT658I

Resistance

: Approx. 12

Ω

AAT492A

DTC P0750 SHIFT SOLENOID VALVE A

AT-311

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

DTC P0750 SHIFT SOLENOID VALVE A

PFP:31940

Description

ECS007NB

Shift solenoid valves A and B are turned ON or OFF by the TCM in
response to signals sent from the PNP switch, vehicle speed and
throttle position sensors. Gears will then be shifted to the optimum
position.

TCM TERMINALS AND REFERENCE VALUE

Remarks: Specification data are reference values.

ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch OFF and wait at least 5 seconds before conducting the
next test.
After the repair, perform the following procedure to confirm the mal-
function is eliminated.

With CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode for
“ENGINE” with CONSULT-II.

SAT341H

Gear position

1

2

3

4

Shift solenoid valve A

ON (Closed)

OFF (Open)

OFF (Open)

ON (Closed)

Shift solenoid valve B

ON (Closed)

ON (Closed)

OFF (Open)

OFF (Open)

Terminal 

No.

Wire color

Item

Condition

Judgement stan-

dard (Approx.)

11

L/W

Shift solenoid 
valve A

When shift solenoid valve A oper-
ates. (When driving in D

1

  or D

4

 )

Battery voltage

When shift solenoid valve A does not 
operate. (When driving in D

2

  or D

3

 )

0V

Diagnostic trouble code

Malfunction is detected when ...

Check item

(Possible cause)

: SFT SOL A/CIRC

TCM detects an improper voltage drop 
when it tires to operate the solenoid valve.

●

Harness or connectors (The solenoid cir-
cuit is open or shorted)

●

Shift solenoid valve A

: P0750

SAT014K

AT-312

[RE4R01A]

DTC P0750 SHIFT SOLENOID VALVE A

2.

Start engine.

3.

Drive vehicle in D position and allow the transmission to shift 1

→ 2 (“GEAR”).

 With GST

●

Follow the procedure “With CONSULT-II”.

SEF949Y