Nissan Maxima Service and Repair Manual: Key slot
Regarding Wiring Diagram information, refer to SEC-147, "Wiring Diagram" or SEC-128, "Wiring Diagram".
1.CHECK KEY SLOT POWER SUPPLY CIRCUIT
Turn ignition switch OFF.
Disconnect key slot connector.
Check voltage between slot harness connector M40 terminal 1, 5 and ground.
2.CHECK KEY SLOT GROUND CIRCUIT
Check continuity between key slot harness connector M40 terminal 7 and ground.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".