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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 890 (Door & Lock (With Intelligent Key System)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Intelligent Key Unit >> INTELLIGENT KEY UNIT: Diagnosis Procedure

INTELLIGENT KEY UNIT: Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect Intelligent Key unit connector.
    3. Check voltage between Intelligent Key unit harness connector M70 terminals 6, 11 and ground.
      Connector Terminals Ignition switch position
      M70 (+) (-) OFF ON
      6 Ground 0V Battery voltage
      11 Battery voltage Battery voltage
      Fig 1: Checking Power Supply Circuit
      G04916798Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 2

      NO: Repair or replace Intelligent Key power supply circuit.

  2. CHECK GROUND CIRCUIT 

    Check continuity between Intelligent Key unit harness connector M70 terminal 12 and ground.

    12 - Ground: Continuity should exist. 

    Fig 2: Checking Ground Circuit Continuity
    G04916799Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: Power supply and ground circuits are OK.

    NO: Repair or replace the Intelligent Key unit ground circuit.

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