Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (DLC3 - ECM AND BODY GROUND)

Disconnect the E5 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
D1-13 (TC) - E5-3 (TC)	Below 1 Ω
D1-13 (TC) - Body ground	10 kΩ or higher
D1-4 (CG) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 1: Disconnecting E5 ECM Connector

OK: REPLACE ECM