ECM 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 following terminals and connectors for damage, bend and loose connection (control module side and harness side).
  - ECM connector
  - Harness connector E5
  - Harness connector F14
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.

TERMINAL RESISTANCE CHART

ECM connector	Terminal		Resistance (Approx.)
E16	94	86	108 - 132 Ω

Fig 1: Identifying Resistance Between ECM Harness Connector Terminals

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

OK or NG

OK : Replace ECM.
NG : Repair harness between ECM and A/T assembly.