Nissan Altima (L32) 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-360, "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-430, "Removal and Installation".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
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
...