Trying to check the heater circuits (p1155 & p1135)on avalon 2002, i have the wiring diagram, I pin 3 HAFR,pin 11AFRT+,pin 20 AFR - for air fuel ratio sensor B1Sensor 1, and pin 4 HAFL, pin 12AFL+,pin 21 AFL-,then [...] pin 9 and 8 for the heated O2 sensor,b2 ... Login to read more.