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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1517 (Automatic Transmission (Re4F04W)) >> DTC P0745: Line Pressure Solenoid Valve >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK VALVE RESISTANCE 
    1. Turn ignition switch to OFF position.
    2. Disconnect terminal cord assembly connector in engine compartment.
    3. Check resistance between terminal cord assembly harness connector F30 terminal 4 and ground.
      Fig 1: Checking Resistance Between Terminal Cord Assembly Harness Connector F30 Terminal 4 & Ground
      G02475249Courtesy of NISSAN MOTOR CO., U.S.A.
      • Resistance: 2.5 - 5Ω 

    OK or NG

    • OK: GO TO 3.
    • NG: GO TO 2.
  2. CHECK VALVE OPERATION 
    1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
    2. Check the following items:
      • Line pressure solenoid valve
        • Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
          Fig 2: Checking Solenoid Valve By Applying Battery Voltage To Terminals
          G02475250Courtesy of NISSAN MOTOR CO., U.S.A.
      • Harness of terminal cord assembly for short or open

    OK or NG

    • OK: GO TO 3.
    • NG: Repair or replace damaged parts.
  3. CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT 
    1. Turn ignition switch to OFF position.
    2. Disconnect TCM harness connector.
    3. Check resistance between terminal cord assembly harness connector F30 terminal 4 (G/R) and TCM harness connector E142 terminal 2 (W/B).
      Fig 3: Checking Resistance Between Terminal Cord Assembly Harness Connector F30 Terminal 4 & TCM Harness Connector E142 Terminal 2
      G02475251Courtesy of NISSAN MOTOR CO., U.S.A.
      • Resistance: 12Ω (Approx.) 

    OK or NG

    • OK: GO TO 5.
    • NG: GO TO 4.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Dropping resistor
    • Check resistance between two terminals.
      • Resistance: 12Ω (Approx.) 
    • Harness for short or open between TCM harness connector E142 terminal 2 (W/B) and terminal cord assembly F30 terminal 4 (G/R)
      Fig 4: Checking Resistance Between Connector Terminals
      G02475252Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK: GO TO 5.
    • NG: Repair or replace damaged parts.
  5. CHECK POWER SOURCE CIRCUIT 
    1. Turn ignition switch to OFF position.
    2. Check continuity between terminal cord assembly harness connector F30 terminal 4(G/R) and TCM harness connector E142 terminal 1 (G/R). Refer to "WIRING DIAGRAM - AT - LPSV ".
      • Continuity should exist. 
    3. Reinstall any part removed.

    OK or NG

    • OK: GO TO 6.
    • NG: Repair open circuit or short to ground or short to power in harness or connectors.
  6. CHECK DTC 

    Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE ".

    OK or NG

    • OK: INSPECTION END 
    • NG: GO TO 7.
  7. CHECK TCM INSPECTION 
    1. Perform TCM input/output signal inspection. Refer to "TCM TERMINALS AND REFERENCE VALUE ".
    2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

    OK or NG

    • OK: INSPECTION END 
    • NG: Repair or replace damaged parts.
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