Checking the relay [Toyota Carina T190]

1. Checking the main heater relay.



a) Check for constant conductivity between terminals "1" and "3".

b) Check for conductivity between terminals "2" and "4".

c) Check for conductivity between terminals "4" and "5".

d) When applying battery voltage to terminals "1" and "3", check for conductivity between terminals "4" and "5" and for the absence of conductivity between terminals "2" and "4" of the relay.