Other information:
Removal
1.
Prior to replacing the 4WD ECU, check the 4WD ECU's clutch learing with
the diagnostic tool.
(Refer to 4WD Control System - "Repair Procedures")
2.
Turn OFF ignition switch and the disconnect the negative (-) battery
cable...
This is used to select the outside (fresh) air position or recirculated air position.
To change the air intake control position, push the control button.
Recirculated air position
With the recirculated air position selected, air from the passenger compartment
will be drawn through the heating system and heated or cooled according to the function
selected...