Check "KEY" Warning Lamp (RED)

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WARNING LAMP OPERATION

With CONSULT-II

Check "INDICATOR" in "ACTIVE TEST" mode with CONSULT-II.
Select "RED ON".

"KEY" warning lamp (red) should illuminate.

Fig 1: Display CONSULT-II - Active Test

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

Without CONSULT-II

Check voltage between Intelligent Key unit harness connector M75 terminal 9 and ground.

TERMINALS VOLTAGE REFERENCE

Connector	Terminal (Wire cooler)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M75	9 (R/G)	Ground	When Intelligent Key is outside vehicle, press ignition switch.	0
M75	9 (R/G)	Ground	Ignition switch OFF	Battery voltage

OK or NG

OK: INSPECTION END

NG: GO TO 2.

Fig 2: Identifying Voltage Between Intelligent Key Unit Connector M75 Terminal 9 And Ground

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

CHECK COMBINATION METER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector and combination meter connector.
3. Check continuity Intelligent Key unit harness connector M75 terminal 9 and combination meter harness connector M20 terminal 50.
  9 (R/G) - 50 (R/G): Continuity should exist .
4. Check continuity Intelligent Key unit harness connector M75 terminal 9 and ground.
  9 (R/G) - Ground: Continuity should not exist .
  
  Fig 3: Identifying Continuity Intelligent Key Unit Connector M75 Terminal 9 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 3.

NG: Repair or replace harness between Intelligent Key unit and combination meter.
CHECK INTELLIGENT KEY UNIT INPUT SIGNAL
1. Connect combination meter connector.
2. Check voltage between Intelligent Key unit harness connector M75 terminal 9 and ground.
  9 (R/G) - Ground: Battery voltage
OK or NG

OK: Check condition of harness and connector.

NG: Check combination meter. Refer to "COMBINATION METERS ".

Fig 4: Identifying Voltage Between Intelligent Key Unit Connector M75 Terminal 9 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.