Nissan Altima 2007-2012 Service Manual: P1745 line pressure control

Description

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

DTC Logic

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

1. Turn ignition switch ON 2. Select “DATA MONITOR”.

3. Make sure that output voltage of CVT fluid temperature sensor is within the range below.

ATF TEMP SEN : 1.0 – 2.0 V

If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid)

Is “P1745 L/PRESS CONTROL” detected? YES >> Go to TM-183, "Diagnosis Procedure".

NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

Diagnosis Procedure

1.CHECK DTC

1. Start engine.

2. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Is “P1745 L/PRESS CONTROL” displayed? YES >> Replace TCM. Refer to TM-254, "Removal and Installation".

NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

    P1740 lock-up select solenoid valve
    Description • 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 ...

    P1777 step motor
    Description The step motor changes the step with turning 4 coils ON/OFF according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is ...

    Other materials:

    Door locks/unlocks precaution
    ● Do not push the door handle request switch with the Intelligent Key held in your hand as illustrated. The close distance to the door handle will cause the Intelligent Key system to have difficulty recognizing that the Intelligent Key is outside the vehicle. ● After locking with ...

    Inspection and adjustment
    REAR VIEW MONITOR GUIDING LINE ADJUSTMENT  Description This mode is used to modify the side distance guidelines if they are dislocated from the rear view monitor image, because of variations of body/camera mounting conditions. Special Repair Requirement 1. Create a correction line to mo ...

    P2101 Electric throttle control function
    Description Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle control motor is operated by the ECM and it opens and closes the throttle valve. The current opening angle of the throttle valve is detected by the throttle pos ...