Description
When the a/c switch is turned on, the magnetic clutch on signal is sent from the air conditioning amplifier. Then the mg clt relay turns on to operate the magnetic clutch.
Wiring diagram

Inspection procedure


Standard resistance:
below 1 


Standard resistance



Standard voltage



Standard voltage



Ok: magnetic clutch is engaged.

Repair or replace wire harness (magnetic clutch - ecu-ig1)
Blower motor circuit
Ig power source circuitEmission control system
Parts location
System diagram
On-vehicle inspection
Check fuel cut rpm
Increase the engine speed to at least 3,500 rpm.
Use a sound scope to check for injector operating
noise.
Check that the operating sounds stop momentarily
and then resume when the t ...
Tire inflation pressure
Make sure to maintain the
proper tire inflation pressure.
Tire inflation pressure
should be checked at least
once per month. However,
Toyota recommends that
tire inflation pressure be
checked once every two
weeks.
Checking the specified
tire inflation pressure
The recommended cold tire
inflation pr ...
Oxygen sensor circuit
Description
In order to obtain a high purification rate of the carbon monoxide (co),
hydrocarbon (hc) and nitrogen
oxide (nox) components in the exhaust gas, a twc is used. For the most efficient
use of the twc, the
air-fuel ratio must be precisely controlled so that it is always close to ...