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".

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