Transfer Control Unit Circuit Inspection

WARNING: This page is about a different car, the 2006 Infiniti QX56. 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 transfer control unit for damage, bend and loose connection (control unit side and harness side).
OK or NG
- OK : GO TO 2.
- NG : Repair terminal or connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect transfer control unit connector.

Check resistance between transfer control unit harness connector terminals.

TERMINAL RESISTANCE CHART

Transfer control unit connector	Terminal		Resistance (Approx.)
E142	7	8	54 - 66 Ω

Fig 1: Identifying Resistance Between Transfer Control Unit Harness Connector Terminals

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

OK or NG

OK : Replace transfer control unit.
NG : Repair harness between transfer control unit and harness connector E152.