Intelligent Key Unit Circuit Inspection

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 CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of Intelligent Key unit for damage, bend and loose connection (unit side and harness side).
OK or NG

OK: GO TO 2.

NG: Repair terminal or connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect Intelligent Key unit connector.

Check resistance between Intelligent Key unit harness connector terminals.

RESISTANCE SPECIFICATIONS

Intelligent Key unit connector	Terminal		Resistance (Approx.)
M75	2	3	54 - 66 ohm

Fig 1: Identifying Resistance Between Intelligent Key Unit Harness Connector Terminals

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

OK or NG

OK: Replace Intelligent Key unit.

NG: Repair harness between Intelligent Key unit and VDC/TCS/ABS control unit.