Infiniti FX35 / FX45. Manual - part 50

AT-128

< SERVICE INFORMATION >

DTC P0745 LINE PRESSURE SOLENOID VALVE

DTC P0745 LINE PRESSURE SOLENOID VALVE

Description

INFOID:0000000001327221

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001327222

On Board Diagnosis Logic

INFOID:0000000001327223

Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-III or 4th judgement flicker without
CONSULT-III is detected under the following conditions.
• When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
• When TCM detects as irregular by comparing target value with monitor value.

Possible Cause

INFOID:0000000001327224

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Line pressure solenoid valve

DTC Confirmation Procedure

INFOID:0000000001327225

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-III

Turn ignition switch ON.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

Touch “START”.

Engine start and wait at least 5 seconds.

If DTC is detected, go to “

AT-128, "Diagnosis Procedure"

WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000001327226

CHECK INPUT SIGNAL

With CONSULT-III

Turn ignition switch ON.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

Start engine.

Read out the value of “LINE PRES SOL” while driving.

OK or NG

>> GO TO 4.

>> GO TO 2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

AT-160

Item name

Condition

Display value (Approx.)

LINE PRES SOL

During driving

0.2 - 0.6 A

Item name

Condition

Display value (Approx.)

LINE PRES SOL

During driving

0.2 - 0.6 A

DTC P0745 LINE PRESSURE SOLENOID VALVE

AT-129

< SERVICE INFORMATION >

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM

Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector
OK or NG

>> Replace the control valve with TCM. Refer to

AT-215, "Control Valve with TCM and A/T Fluid Tem-

perature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform

AT-128, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

AT-130

< SERVICE INFORMATION >

DTC P1705 THROTTLE POSITION SENSOR

DTC P1705 THROTTLE POSITION SENSOR

Description

INFOID:0000000001327227

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 signals to TCM with CAN com-
munication.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001327228

On Board Diagnosis Logic

INFOID:0000000001327229

Diagnostic trouble code “P1705 TP SEN/CIRC A/T” with CONSULT-III or 15th judgement flicker without CON-
SULT-III is detected when TCM does not receive the proper accelerator pedal position signals (input by CAN
communication) from ECM.

Possible Cause

INFOID:0000000001327230

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

DTC Confirmation Procedure

INFOID:0000000001327231

WITH CONSULT-III

Turn ignition switch ON.

Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

Touch “START”.

Start engine and let it idle for 1 second.

If DTC is detected, go to

AT-130, "Diagnosis Procedure"