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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1056 (Automatic Transaxle Overhaul & Diagnostics) >> Re4F04B >> DTC PO745 Line Pressure Solenoid Valve >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 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.
      Fig 1: Checking Resistance Between Terminal Cord Assembly Harness Connector F30 Terminal 4 And Ground
      G00740010Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Disconnect terminal cord assembly connector in engine compartment.
    3. Check resistance between terminal cord assembly harness connector F30 terminal 4 and ground.

      Resistance: 2.5 - 5Ω 

    OK or NG 

    1. OK: GO TO  3.
    2. NG: GO TO. 2
  2. CHECK VALVE OPERATION 
    1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
      Fig 2: Checking Line Pressure Solenoid Valve Operation
      G00740011Courtesy of NISSAN MOTOR CO., U.S.A.
    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 damage parts.
  3. CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT 
    1. Turn ignition switch to OFF position.
      Fig 3: Checking Resistance Between Terminal Cord Assembly And TCM Connector Terminals
      G00740012Courtesy of NISSAN MOTOR CO., U.S.A.
    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).

      Resistance: 12Ω (Approx.) 

    OK or NG 

    1. OK: GO TO  5.
    2. NG: GO TO 4.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    Fig 4: Checking Dropping Resistor Resistance
    G00740013Courtesy of NISSAN MOTOR CO., U.S.A.
    • 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)

    OK or NG 

    1. OK: GO TO 5.
    2. 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 

    1. OK: GO TO 7.
    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. 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 

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