Ignition Knob Switch Check

WARNING: This page is about a different car, the 2008 Nissan Maxima. 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 switch operation.

IGNITION KNOB SWITCH

Monitor item	Condition
PUSH SW	Ignition switch is pushed: ON
PUSH SW	Ignition switch is released: OFF

Without CONSULT-III

Turn ignition switch OFF.
Disconnect Intelligent Key unit connector.
Check voltage between Intelligent Key unit harness connector M52 terminal 27 and ground.

INTELLIGENT KEY UNIT HARNESS CONNECTOR M52 TERMINAL 27 AND GROUND

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M52	27	Ground	Ignition switch is pushed	Battery voltage
M52	27	Ground	Ignition switch is released	0

Fig 1: Checking Voltage Between Intelligent Key Unit Harness Connector M52 Terminal 27 And Ground

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

OK or NG

OK: Ignition knob switch is OK.

NG: GO TO 2.

CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
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 M73 terminal 1 and ground.
  1 - Ground: Battery voltage
Fig 2: Checking Voltage Between Key Switch And Ignition Knob Switch Harness Connector M118 Terminal 1 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.

IGNITION KNOB SWITCH OPERATION

Component	Terminals		Condition	Continuity
Ignition knob switch	1	2	Ignition switch is pushed	Yes
Ignition knob switch	1	2	Ignition switch is released	No

Fig 3: Checking Continuity Between Ignition Knob Switch Harness Connector M118 Terminal 1 And 2

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

OK or NG

OK: GO TO 4.

NG: Replace key switch and ignition knob switch.

CHECK IGNITION KNOB SWITCH CIRCUIT
1. Check continuity between Intelligent Key unit harness connector (A) M52 terminal 27 and key switch and ignition knob switch harness connector (B) M73 terminal 2.
  27 - 2: Continuity should exist.
2. Check continuity between Intelligent Key unit harness connector M52 terminal 27 and ground.
  27 - Ground: Continuity should not exist.
Fig 4: Checking Continuity Between Intelligent Key Unit Harness Connector M52 Terminal 27 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

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.