ECM Circuit Inspection

WARNING: This page is about a different car, the 2006 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect battery cable from the negative terminal.
3. Check terminals and connectors of ECM for damage, bend and loose connection (control module side and harness side).
OK or NG

OK: GO TO 2.

NG: Repair terminal or connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect ECM connector.
Check resistance between ECM harness connector terminals.

ECM CONNECTOR TERMINAL RESISTANCE

ECM connector	Terminal		Resistance (Approx.)
F59	94	86	108 - 132 Ω

OK or NG

OK: Replace ECM.

NG: Repair harness between ECM and TCM.

Fig 1: Checking Resistance Between ECM Harness Connector Terminals

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