Fig. 26: Identifying Climate Control Unit Connector Terminals
Courtesy of MAZDA MOTORS CORP.
TERMINAL VOLTAGE REFERENCE TABLE
Terminal Signal name
Connected to
Measurement
condition
Voltage
(V)
Inspection item (s)
A
IG2
A/C 7.5 A fuse
IG SW ON
B+
Wiring harness:
continuity, short circuit
(Climate control unit-
fuse: A-A/C 7.5 A)
A/C 7.5 A fuse
IG SW LOCK
1.0 or
less
Wiring harness:
continuity, short circuit
(Climate control unit-
fuse: A-A/C 7.5 A)
B
B+
ROOM 15 A
fuse
Under any condition
B+
Wiring harness:
continuity, short circuit
(Climate control unit-
fuse: B-ROOM 15 A)
ROOM 15 A fuse
C
Blower fan
speed control
Power MOS
FET
Fan stopped
1.0 or
less
Wiring harness:
continuity, short circuit
(Climate control unit-
power MOS FET: C-C)
Power MOS FET
Fan: manual LO
2.8
Fan: manual HI
9.9
D
TNS signal
TNS relay
Headlight switch
OFF
1.0 or
less
Wiring harness: short
circuit (Climate control
unit-TNS relay: D-D)
TNS relay
Headlight switch
Wiring harness:
continuity, short circuit
2007 Mazda MX-5 Miata Sport
2007 HVAC Control System - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:27:32 PM
Page 27
© 2005 Mitchell Repair Information Company, LLC.