A/C Cut-Off Control Block Diagram [Lf] - Mazda 2006 MX-5 Service Highlights

A/C CUT-OFF CONTROL OUTLINE [LF]
• Through energization and non-energization to the A/C relay (magnetic clutch) according to engine operation
conditions, acceleration performance and engine reliability have been improved.
End Of Sie

A/C CUT-OFF CONTROL BLOCK DIAGRAM [LF]

TP SENSOR NO.1, NO.2
APP SENSOR NO.1, NO.2
ECT SENSOR
CKP SENSOR
NEUTRAL SWITCH (MT)
CPP SWITCH (MT)
A/C AMPLIFER
REFRIGERANT PRESSURE
SWITCH (HIGH, LOW)
TR SWITCH (AT)
End Of Sie
A/C CUT-OFF CONTROL OPERATION [LF]
• The PCM stops energization to the A/C relay when any of the following conditions are met:
A/C cut-off control operation conditions
Operation condition
At engine start
At drive-away
During acceleration (throttle valve opening angle 50%
or more)
When the engine coolant temperature is 113 °C {235
°F}
When the engine coolant temperature is 118 °C {245
°F} or more
At high engine speed (engine speed 6,600 rpm or
more)
End Of Sie
CONTROL SYSTEM
PCM
A/C relay non-energization period
Approx. 4 s
Approx. 3 s
Approx. 5 s
Repeatedly turns on and off every 10 s
until the engine coolant temperature is
less than approx. 110 °C {230 °F}
Until the engine coolant temperature
decreases to less than approx. 114 °C
{237 °F}
Approx. 1 s
E5U014000000N43
E5U014000000N44
A/C RELAY
E5U140ZT5009
E5U014000000N45
Purpose
Improved startability
Improved drive-away
performance
Improved acceleration
performance
Improved engine reliability
Improved engine reliability
Improved engine speed
stability
01–40–33
01–40