K
A/C
Refrigerant
pressure switch
A/C switch ON, fan
switch at 1st
1.0 or
less
circuit (Climate control
unit-refrigerant pressure
switch: K-A)
A/C switch OFF
B+
Wiring harness:
continuity, short circuit
(Climate control unit-
refrigerant pressure
switch: K-A) (Refrigerant
pressure switch-PCM: C-
1J )
Refrigerant pressure
switch
PCM: terminal voltage
(1J)
L
-
-
-
-
-
M
Evaporator
temperature
sensor input
Evaporator
temperature
sensor
Compared with
temperature detected
by evaporator
temperature sensor
Refer to
Fig. 27
Wiring harness:
continuity (Climate
control unit-evaporator
temperature sensor: M-B,
S-A)
Wiring harness: short
circuit (Climate control
unit-evaporator
temperature sensor: M-B)
Evaporator temperature
sensor
N
Rear window
defroster
operation
Rear window
defroster relay
Rear window
defroster switch
OFF
B+
Wiring harness:
continuity, short circuit
(Climate control unit-rear
window defroster relay:
N-E)
Rear window defroster
relay
Rear window
defroster switch ON
1.0 or
less
O
-
-
-
-
-
P
-
-
-
-
-
Q
-
-
-
-
-
R
-
-
-
-
-
S
Sensor GND
Evaporator
temperature
sensor
Under any condition
1.0 or
less
Wiring harness:
continuity (Climate
control unit-GND: S-
GND)
T
-
-
-
-
-
2007 Mazda MX-5 Miata Sport
2007 HVAC Control System - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:27:32 PM
Page 29
© 2005 Mitchell Repair Information Company, LLC.