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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Automatic Transaxle) >> DTC P0745 Line Pressure Solenoid Valve >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
  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 terminal 4 and ground.

      Resistance: 2.5 - 5Ω 

    OK or NG

    1. OK: GO TO  3.
    2. NG: GO TO 2.
      Fig 1: Terminal Cord Assembly and Ground Continuity Test
      G02886681Courtesy of NISSAN MOTOR CO., U.S.A.
  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.
      • Harness of terminal cord assembly for short or open

    OK or NG

    1. OK: GO TO 3.
    2. NG: Repair or replace damaged parts.
      Fig 2: Checking Valve Operation
      G02886682Courtesy of NISSAN MOTOR CO., U.S.A.
  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 4 (G/R) and TCM harness connector terminal 2 (W/B).

      Resistance: 10 - 15Ω 

    OK or NG

    1. OK: GO TO  5.
    2. NG: GO TO 4.
      Fig 3: Terminal 4 & TCM Connector Continuity Test
      G02886683Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Dropping resistor
    • Check resistance between two terminals.

      Resistance: 10 - 15Ω 

    • Harness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)

    OK or NG

    1. OK: GO TO 5.
    2. NG: Repair or replace damaged parts.
      Fig 4: Two Terminals Resistance Continuity Test
      G02886684Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK POWER SOURCE CIRCUIT 
    1. Turn ignition switch to OFF position.
    2. Check continuity between terminal cord assembly harness connector terminal 4 and TCM harness connector terminal 1. Refer to "WIRING DIAGRAM - AT - LPSV ".

      Continuity should exist. 

    3. Reinstall any part removed.

    OK or NG

    1. OK: GO TO 6.
    2. 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

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

    OK or NG

    1. OK: INSPECTION END 
    2. NG: Repair or replace damaged parts.
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