A/C CUTOFF CONTROL SYSTEM

F2-135prose procedure

References MTX (neutral switch, clutch switch) and ATX (transaxle range signal from TCM) inputs to the A/C cut-off determination.

DESCRIPTION

An A/C cut-off control system is used to improve idle smoothness just after starting the engine and to improve acceleration performance.

Engine condition	Purpose	Cut-off period
After engine started	Improved idle smoothness	Approx. 5 sec.
Throttle valve fully open	Improved drivability	Approx. 5 sec.
Engine coolant temperature over 113°C {235°F}	Prevents engine from overheating	Cycled ON/OFF (10sec.) until engine coolant temperature reduced to 107°C {225°F}

After engine started

PurposeImproved idle smoothness

Cut-off periodApprox. 5 sec.

Throttle valve fully open

PurposeImproved drivability

Cut-off periodApprox. 5 sec.

Engine coolant temperature over 113°C {235°F}

PurposePrevents engine from overheating

Cut-off periodCycled ON/OFF (10sec.) until engine coolant temperature reduced to 107°C {225°F}

1
Turn the ignition switch to ON.
2
Turn the blower switch and A/C switch ON.
3
Verify that the condenser fan stops.
4
Turn the ignition switch to START and verify that the condenser fan stops for approx. 5 sec.
The magnetic clutch and the additional fan operate together.