duct)
Proper sealing of
intake manifold
and components
attached to intake
manifold: EGR
valve
Ignition wiring
Electrical
connections
Fuses
Smooth operation
of throttle valve
Are all items normal?
9
Connect the M-MDS or
equivalent to the DLC-
2.
Turn the ignition switch
to the ON position
(Engine off).
Retrieve any DTCs.
Are there any DTCs
displayed?
Yes
DTC is displayed:
Go to the appropriate DTC
inspection.
(See
DTC TABLE [LF]
.)
Communication error message
is displayed:
Inspect for the following:
Open circuit in wiring
harness between main
relay and PCM terminal
1AW or 1BE
Open main relay GND
circuit
Open or short circuit in
wiring harness between
DLC and PCM terminal
1AM or 1AI
Main relay is stuck open.
Open or poor GND circuit
(PCM terminal 1AZ,
1BB, 1BD, 1BH)
Poor connection of
vehicle body GND
No
No DTC is displayed:
Go to the next step.
10
Connect the M-MDS or
equivalent to the DLC-
Yes
Go to the next step.
No
Inspect for the following:
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:09 PM
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