Inspection Procedure

1. Disconnect the gateway ECU connector E23.
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE SPECIFICATIONS
   
   

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

3. Measure the voltage according to the value(s) in the table below.
   STANDARD VOLTAGE SPECIFICATIONS
   
   

   Tester connection	Condition	Specified condition
   BATT - GND	Always	10 to 14 V
   ACC - GND	Ignition switch on (ACC)	10 to 14 V
   IG - GND	Ignition switch on (IG)	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 1: Disconnecting Gateway ECU Connector E23

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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