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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1166 (Engine Control System - DTCS U0101 To P0153) >> P0014, P0024 EVT Control >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUNCTION OF EXHAUST VALVE TIMING (EVT) CONTROL

    With CONSULT-III 

    1. Turn ignition switch ON.
    2. Select "EXH V/T ASSIGN ANGLE" in "ACTIVE TEST" mode with CONSULT-III.
    3. Start engine and keep the engine speed at 2, 500 RPM, then touch "START".
    4. Check that the values of "EXH/V TIM B1" and "EXH/V TIM B2" change when touching "UP" or "DOWN".

    Without CONSULT-III 

    1. Start engine and rev engine up above 1, 500 RPM.
    2. Read the voltage signal between ECM harness connector terminals as per the following with an oscilloscope.
    TERMINAL CONNECTOR REFERENCE CHART

    ECM Voltage signal
    + -
    Connector Terminal Connector Terminal
    F13 79 [EVT control magnet retarder (bank 1) signal] E10 112
    G05869716Courtesy of NISSAN MOTOR CO., U.S.A.
    80 [EVT control magnet retarder (bank 2) signal]

    Is the inspection result normal? 

    YES: GO TO 10.

    NO: GO TO 2.

  2. CHECK EVT CONTROL MAGNET RETARDER

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: GO TO 3.

  3. REPLACE EVT CONTROL MAGNET RETARDER
    1. Replace malfunctioning EVT control magnet retarder.
    2. Perform "EXHAUST VALVE TIMING CONTROL LEARNING: SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  4. CHECK EVT CONTROL POSITION SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace malfunctioning EVT control position sensor.

  5. CHECK CRANKSHAFT POSITION SENSOR

    Refer to "DISASSEMBLY AND ASSEMBLY ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Replace crankshaft position sensor.

  6. CHECK CAMSHAFT POSITION SENSOR

    Refer to "REMOVAL AND INSTALLATION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace malfunctioning camshaft position sensor.

  7. CHECK CAMSHAFT (EXH)

    Check the following.

    • Accumulation of debris to the signal plate of camshaft rear end
    • Chipping signal plate of camshaft rear end

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.

    Fig 1: Checking Camshaft (EXH)
    G05869717Courtesy of NISSAN MOTOR CO., U.S.A.
  8. CHECK TIMING CHAIN INSTALLATION

    Check service records for any recent repairs that may cause timing chain misalignment.

    Are there any service records that may cause timing chain misalignment? 

    YES: Check timing chain installation. Refer to "COMPONENT ".

    NO: GO TO 9.

  9. REPLACE EVT CONTROL PULLEY ASSEMBLY
    1. Replace exhaust valve timing control pulley assembly and EVT control magnet retarder. Refer to "COMPONENT " and "REMOVAL AND INSTALLATION ".
    2. Perform "EXHAUST VALVE TIMING CONTROL LEARNING: SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  10. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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