Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT GATEWAY ECU

Disconnect the gateway ECU connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
J76-24 (GND) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Fig 1: Identifying Gateway ECU Connectors

Standard Voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
J76-10 (BATT) - J76-24 (GND)	Always	11 to 14 V
J76-2 (ACC) - J76-24 (GND)	Engine switch on (ACC)	11 to 14 V
J76-1 (IG) - J76-24 (GND)	Engine switch on (IG)	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )