Ignition Knob Switch Check

With CONSULT 

Display "PUSH SW" on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch operation.

Without CONSULT 

1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M42 terminal 27 and ground.

   Connector	Terminals		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   M42	27	Ground	Ignition switch is pushed	Battery voltage
   			Ignition switch is released	0

   Fig 1: Checking Ignition Knob Switch

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: Ignition knob switch is OK.

   NG: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch harness connector M49 terminal 4 and ground.

   4 - Ground: Battery voltage 

   Fig 2: Checking Ignition Knob Switch Power Supply Circuit

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: GO TO 3.

   NG: Repair or replace key switch and ignition knob switch power supply circuit.

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

Fig 3: Checking Ignition Knob Switch Operation

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO 4.

NG: Replace key switch and ignition knob switch.

1. Check continuity between Intelligent Key unit harness connector M42 (A) terminal 27 and key switch and ignition knob switch harness connector M49 (B) terminal 3.

   27 - 3: Continuity should exist  .

2. Check continuity between Intelligent Key unit harness connector M42 terminal 27 and ground.

   27 - Ground: Continuity should not exist  .

   Fig 4: Checking Ignition Knob Switch Circuit

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: Check the condition of harness and harness connector.

   NG: Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.