Mazda MX-5 Miata Sport 2007 Manual page 2004

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
contamination,
winter/summer
blend) Are all
items normal?
2 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?
3 Is the engine
overheating?
4 Connect the M-MDS or
equivalent to the DLC-
2.
Access APP1, APP2,
RPM, MAF, TP, IAT
and VSS PIDs.
Drive vehicle while
monitoring PIDs.
Are PIDs within
specifications?
(See PCM
INSPECTION [LF] .)
5 Visually inspect the
CKP sensor and teeth of
2007 Mazda MX-5 Miata Sport
Yes
No
Yes
No
Yes
No
Yes
DTC is displayed:
Go to the appropriate DTC
inspection.
(See DTC TABLE [LF] .)
DTC is displayed:
Go to the next step.
Go to symptom troubleshooting
NO.17 COOLING SYSTEM
CONCERNS-
OVERHEATING [LF] .
Go to the next step.
Go to the next step.
APP1, APP2 PIDs:
Inspect if output signal
accelerator pedal position sensor
changes smoothly.
RPM PID:
Inspect CKP sensor and related
wiring harness for vibration or
intermittent open/short circuit or
both.
MAF PID:
Inspect for intermittent open
circuit of MAF sensor and
related wiring harness.
TP PID:
Inspect if output signal TP
sensor changes smoothly.
IAT PID:
Inspect for air suction in intake-
air system.
If normal, inspect intermittent
short circuit of IAT sensor and
related wiring harnesses.
VSS PID:
Inspect for intermittent open
circuit of VSS and related
wiring harness.
Go to the next step.