Diagnosis Procedure

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

1. CHECK KEY SWITCH

   With CONSULT 

   Check key switch ("KEY SW") in "DATA MONITOR" mode with CONSULT.

   Monitor Item	Condition
   KEY SW	Insert mechanical key into ignition switch: ON
   	Remove mechanical key from ignition switch: OFF

   Without CONSULT 

   1. Turn ignition switch OFF.
   2. Disconnect Intelligent Key unit harness connector.
   3. Check voltage between Intelligent Key unit harness connector M164 terminal 7 and ground.

   Connector	Terminals		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   M164	7	Ground	Insert mechanical key into ignition switch	Battery voltage
   			Remove mechanical key from ignition switch	0

   Fig 1: Checking Voltage Between Intelligent Key Unit Harness Connector M164 Terminal 7 And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal? 

   YES: Key switch is OK.

   NO: GO TO 2

2. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
   1. Remove mechanical key from ignition switch.
   2. Disconnect key switch and ignition knob switch connector.
   3. Check voltage between key switch and ignition knob switch harness connector M66 terminal 3 and ground.

      3 - Ground: Battery voltage 

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace key switch and ignition knob switch power supply circuit.

   Fig 2: Checking Voltage Between Key Switch And Ignition Knob Switch Harness Connector M66 Terminal 3 And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.
3. CHECK KEY SWITCH OPERATION

   Check continuity between key switch and ignition knob switch terminals 3 and 4.

   Component	Terminals		Condition	Continuity
   Key switch	3	4	Insert mechanical key into ignition switch.	Yes
   			Remove mechanical key from ignition switch.	No

   Fig 3: Checking Continuity Between Key Switch And Ignition Knob Switch Terminals 3 And 4

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   Is the inspection result normal? 

   YES: GO TO 4

   NO: Replace key cylinder assembly (built-in key switch).

4. CHECK KEY SWITCH CIRCUIT
   1. Check continuity between Intelligent Key unit harness connector (A) M164 terminal 7 and key switch and ignition knob switch harness connector (B) M66 terminal 4.

      7 - 4: Continuity should exist  .

   2. Check continuity between Intelligent Key unit harness connector (A) M164 terminal 7 and ground.

      7 - Ground: Continuity should not exist  .

      Is the inspection result normal? 

      YES: Check the condition of harness and harness connector.

      NO: Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.

   Fig 4: Checking Continuity Between Intelligent Key Unit Harness Connector M164 Terminal 7 And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.