Power Supply and Ground Circuit 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 POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect Intelligent Key unit connector.

Check voltage between Intelligent Key unit harness connector M52 terminals 6, 11 and ground.

INTELLIGENT KEY UNIT HARNESS CONNECTOR M52 TERMINALS 6, 11 AND GROUND

Connector	Terminals		Ignition switch position
M52	(+)	(-)	OFF	ON
	6	Ground	0V	Battery voltage
	11	Ground	Battery voltage	Battery voltage

Fig 1: Checking Voltage Between Intelligent Key Unit Harness Connector M52 Terminals 6, 11 And Ground

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

OK or NG

OK: GO TO 2.

NG: Repair or replace Intelligent Key power supply circuit.

CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector M52 terminal 12 and ground.

12 - Ground: Continuity should exist.

Fig 2: Checking Continuity Between Intelligent Key Unit Harness Connector M52 Terminal 12 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Power supply and ground circuits are OK.

NG: Repair or replace the Intelligent Key unit ground circuit.