Toyota 2GR-FE Manual page 354

ES–198
Reference (System Diagram of Bank 1 Sensor 2):
EFI MAIN
From
Battery
ES
Ground
OK
REPLACE HEATED OXYGEN SENSOR (See page EC-20)
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
EFI Relay
EFI No. 3
NG
HO2 Sensor
Heater
HT1B
+B HT1B
Sensor
OX1B OX1B
E2
EX1B
MREL
REPAIR OR REPLACE HARNESS OR
CONNECTOR
ECM
Duty
Control
A103832E39