Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT GATEWAY ECU

Disconnect the gateway ECU connector G3.

Fig 1: Identifying Gateway ECU Connector G3
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Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
GND - Body ground	Always	Below 1 Ω

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
BATT - GND	Always	10 to 14 V
ACC - GND	Ignition switch in the ACC position	10 to 14 V
IG - GND	Ignition switch in the ON position	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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