between A/C relay
and PCM terminal
11.
If both items normal, go
to the next step.
No
Inspect if circuit between
the A/C relay and
magnetic clutch shorts to
battery power circuit.
If the circuit is normal,
inspect the magnetic
clutch for stuck
engagement or clearance.
3
Disconnect refrigerant
pressure switch
connector.
Start the engine and turn
A/C switch on.
Does the A/C remain
working?
NOTE:
A/C should not
work when
disconnecting
connector. If A/C
remains working,
short to GND
circuit may be
present.
Yes
Inspect for short to GND
in wiring harness
between refrigerant
pressure switch and PCM
terminal 1AU.
No
Go to the next step.
4
Reconnect refrigerant
pressure switch
connector.
Turn off A/C switch.
NOTE:
A/C should not
work when
turning A/C
switch off. If A/C
remains working,
short to GND
circuit may be
Yes
Inspect following:
Short to GND in
wiring harness
between A/C
switch and A/C
amplifier
Short to GND
circuit between
A/C amplifier and
refrigerant pressure
switch
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:11 PM
Page 104
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