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Home >> Nissan-Datsun >> 2012 >> 370Z Nismo >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System And Component Testing >> S-Mode Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK DTC WITH "COMBINATION METER"

    Refer to "CONSULT FUNCTION (METER/M&A) ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Perform trouble diagnosis relevant to DTC indicated.

  2. CHECK S-MODE SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect S-MODE switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between S-MODE switch harness connector and ground.
      S-MODE switch Ground Voltage
      Connector Terminal
      M255 2 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  4.

      NO: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M98, M252
    • Fuse block (J/B) connector M1
    • 10 A fuse (No. 3)
    • Harness for open or short between S-MODE switch and fuse

    Repair open circuit, short to ground or short to power in harness or connectors.

  4. CHECK S-MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect combination meter harness connector.
    3. Check the continuity between S-MODE switch harness connector and combination meter harness connector.
      S-MODE switch Combination meter Continuity
      Connector Terminal Connector Terminal
      M255 1 M53 12 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M98, M252
    • Harness for open or short between S-MODE switch and combination meter

    Repair open circuit, short to ground or short to power in harness or connectors.

  6. CHECK S-MODE SWITCH

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace S-MODE switch.

  7. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END