and run smoothly at
part throttle?
control system operation.
(See
ELECTRONIC
THROTTLE CONTROL
SYSTEM INSPECTION
.)
No
Go to the next step.
14
Connect the M-MDS or
equivalent to the DLC-
2.
Access RPM PID.
Is RPM PID indicating
the engine speed when
cranking the engine?
Yes
Go to the next step.
No
Inspect for the following:
Open or short circuit in
CKP sensor
Open or short circuit in
wiring harness between
CKP sensor terminal A
and PCM terminal 2AB
Open or short circuit in
wiring harness between
CKP sensor terminal B
and PCM terminal 2W
Open or short circuit in
wiring harness between
CKP sensor terminal C
and PCM terminal 2AQ
Open or short circuit in
CKP sensor wiring
harnesses
If CKP sensor and wiring
harness are normal, go to the
next step.
15
Visually inspect the
CKP sensor and teeth of
crankshaft pulley.
Are CKP sensor and
teeth of crankshaft
pulley normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
16
Inspect the ignition coil
related wiring harness
condition (intermittent
open or short circuit)
for all cylinders. Are
wiring harness
conditions normal?
Yes
Go to the next step.
No
Repair the wiring harnesses.
17
Perform the spark test.
(See
SPARK TEST
.)
Yes
Go to the next step.
No
Repair or replace the
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:09 PM
Page 43
© 2005 Mitchell Repair Information Company, LLC.
