Gateway ECU Communication Stop Mode: Procedure

1. Disconnect the network gateway ECU connector.
   Fig 1: Identifying Network Gateway ECU (E53) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   E53-16 (CA1H) - E53-15 (CA1L)	Ignition switch off	54 to 69 Ω

NG → REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CANH, CANL) 

OK: Go to next step 

1. Disconnect the network gateway ECU connector.
   Fig 2: Network Gateway ECU Wire Harness Connector (E53)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E53-4 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E53-10 (IG1) - Body ground	Ignition switch ON	10 to 14 V
   E53-9 (IG2) - Body ground	Ignition switch ON	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3