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Home >> Nissan-Datsun >> 2019 >> 370Z Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 2) >> Component/Circuit Diagnosis >> S-Mode Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK DTC WITH "COMBINATION METER" 

    Refer to Diagnosis Description .

    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 Inspection .

    INSPECTION END