Inspection Procedure

WARNING: This page is about a different car, the 2007 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
  - ECM
  - Harness connector E4 (M/T models without ABS)
  - Harness connector M2 (M/T models without ABS)
OK or NG

OK: GO TO 2.

NG: Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of ECM.

Check the resistance between the ECM harness connector terminals.

MR20DE

CONNECTOR TERMINAL RESISTANCE SPECIFICATION

ECM harness connector			Resistance (Ω)
Connector No.	Terminal No.		Resistance (Ω)
E16	84	83	Approx. 108 - 132

QR25DE

CONNECTOR TERMINAL RESISTANCE SPECIFICATION

ECM harness connector			Resistance (Ω)
Connector No.	Terminal No.		Resistance (Ω)
E16	98	97	Approx. 108 - 132

OK or NG

OK: GO TO 3.

NG: Repair the ECM branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to "POWER SUPPLY AND GROUND CIRCUIT " (MR20DE) or "POWER SUPPLY AND GROUND CIRCUIT " (QR25DE).

OK or NG

OK:
- Present error: Replace the ECM. Refer to "PROCEDURE AFTER REPLACING ECM " (MR20DE) or "PROCEDURE AFTER REPLACING ECM " (QR25DE).
- Past error: Error was detected in the ECM branch line.
NG: Repair the power supply and the ground circuit.