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Home >> Infiniti >> 2017 >> Q70 Hybrid >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Drive Mode System (Hybrid) >> DTC/Circuit Diagnosis >> Drive Mode Select Switch Circuit >> Diagnosis Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Diagnosis Procedure

  1. CHECK CONTINUITY DRIVE MODE SELECT SWITCH SIGNAL CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect the drive mode select switch connector and A/C auto amp. connector.
    3. Check continuity between drive mode select switch harness connector and A/C auto amp. harness connector.
      Drive mode select switch A/C auto amp. Continuity
      Connector Terminal Connector Terminal
      M203 1 M66 23 Existed
      2 24
      3 25
      4 26
    4. Check continuity between drive mode select switch harness connector and ground.
      Drive mode select switch Ground Continuity
      Connector Terminal
      M203 1 Not existed
      2
      3
      4

    Is the inspection result normal?

    YES 

    GO TO STEP 2 

    NO 

    Repair harness or connector

  2. CHECK VOLTAGE OF A/C AUTO AMP.

    1. Connect the A/C auto amp. connector.
    2. Check voltage between A/C auto amp. harness connector and ground.
      Terminals Voltage (Approx.)
      (+) (-)
      A/C auto amp. Ground
      Connector Terminal
      M66 23 12 V
      24
      25
      26

    Is the inspection result normal?

    YES 

    GO TO STEP 3 

    NO 

    Replace A/C auto amp.

  3. CHECK DRIVE MODE SELECT SWITCH GROUND CIRCUIT

    1. Check continuity drive mode select switch harness connector and ground.
      Drive mode select switch Ground Continuity
      Connector Terminal
      M203 6 Existed

    Is the inspection result normal?

    YES 

    Check drive mode select switch. Refer to COMPONENT INSPECTION .

    NO 

    Repair harness or connector.