Differential Lock Control Unit Circuit Inspection

WARNING: This page is about a different car, the 2006 Nissan Titan. 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 differential lock 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 differential lock control unit connector.

Check resistance between differential lock control unit harness connector terminals.

Fig 1: Checking Resistance Between Differential Lock Control Unit Harness Connector Terminals

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

DIFFERENTIAL LOCK CONTROL UNIT HARNESS CONNECTOR RESISTANCE

Differential lock control unit connector	Terminal		Resistance (Approx.)
B77	5	4	54 - 66 Ω

OK or NG

OK: Replace differential lock control unit.

NG: Repair harness between differential lock control unit and harness connector B69.