Check Ignition Knob Switch

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IGNITION KNOB SWITCH
With CONSULT-III

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

Press ignition knob. : ON

Return ignition knob (release hands from ignition knob) : OFF

OK or NG

OK: Ignition knob switch is OK.

NG: GO TO 2.
CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition knob LOCK position.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch connector M22 terminal 1 (L/R) and ground.
  1 (L/R) - Ground : Battery voltage
  
  Fig 1: Identifying Voltage Between Key Switch And Ignition Knob Switch Connector M22 Terminal 1 (L/R) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 3.

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

CHECK IGNITION KNOB SWITCH OPERATION

Check continuity between key switch and ignition knob switch terminals 1 and 2.

Fig 2: Identifying Continuity Between Ignition Knob Switch Harness Connector Terminal 1 And 2

Courtesy of NISSAN MOTOR CO., U.S.A.

IGNITION KNOB SWITCH OPERATION

Connector	Terminal		Condition	Continuity
M22	1	2	Press ignition knob	Yes
M22	1	2	Return ignition knob (Release hands from ignition knob)	No

OK or NG

OK: GO TO 4.

NG: Replace key switch and ignition knob switch.

CHECK IGNITION KNOB SWITCH CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector M34 terminal 27 (L/W) and key switch and ignition knob switch connector M22 terminal 2 (L/W).
  27 (L/W) - 2 (L/W) : Continuity should exist.
3. Check continuity between key switch and ignition knob switch connector terminal 2 (L/W) and ground.
  2 (L/W) - Ground : Continuity should not exist.
  
  Fig 3: Identifying Continuity Between Key Switch And Ignition Knob Switch Connector Terminal 2 (L/W) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Replace Intelligent Key unit.

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