Mazda MX-5 Miata Sport 2007 Manual page 1976

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
and run smoothly at
part throttle?
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?
15 Visually inspect the
CKP sensor and teeth of
crankshaft pulley.
Are CKP sensor and
teeth of crankshaft
pulley normal?
16 Inspect the ignition coil
related wiring harness
condition (intermittent
open or short circuit)
for all cylinders. Are
wiring harness
conditions normal?
17 Perform the spark test.
(See SPARK TEST .)
2007 Mazda MX-5 Miata Sport
No
Yes
No
Yes
No
Yes
No
Yes
No
control system operation.
(See ELECTRONIC
THROTTLE CONTROL
SYSTEM INSPECTION .)
Go to the next step.
Go to the next step.
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.
Go to the next step.
Replace the malfunctioning part.
Go to the next step.
Repair the wiring harnesses.
Go to the next step.
Repair or replace the