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 circuitRemoval (2006/01- )
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove air cleaner case sub-assembly (for
2az-fe)
Remove the air clea ...
Check for intermittent problems
Hint:
Inspect the vehicle's ecm using check mode. Intermittent
problems are easier to detect with the intelligent tester when
the ecm is in check mode. In check mode, the ecm uses 1
trip detection logic, which is more sensitive to malfunctions
than normal mode (default), which uses 2 trip detec ...
Random / multiple cylinder misfire detected
Description
When the engine misfires, high concentrations of hydrocarbons (hc) enter the
exhaust gas. Extremely
high hc concentration levels can cause increases in exhaust emission levels.
High concentrations of hc
can also cause increases in the three-way catalytic converter (twc) te ...