BCM Circuit Inspection

WARNING: This page is about a different car, the 2006 Nissan Xterra. 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 BCM 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 BCM connector.

Check resistance between BCM harness connector terminals.

RESISTANCE CHART

BCM connector	Terminal		Resistance (Approx.)
M18	39	40	54 - 66 ohm

Fig 1: Identifying Resistance Between BCM Harness Connector Terminals

OK or NG

OK >> Replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM .

NG >> Repair harness between BCM and data link connector.