blend)
Electrical
connections
Smooth operation
of throttle valve
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?
Yes
DTC is displayed:
Go to the appropriate DTC
inspection.
(See
DTC TABLE [LF]
.)
No
No DTC is displayed:
Go to the next step.
3
Is engine overheating?
Yes
Go to symptom troubleshooting
NO.17 COOLING SYSTEM
CONCERNS-
OVERHEATING [LF]
.
No
Go to the next step.
4
Connect the M-MDS or
equivalent to the DLC-
2.
Access APP1, APP2,
RPM, VPWR, MAF,
TP and VSS PIDs.
Drive the vehicle with
monitoring PIDs.
Are PIDs within
specifications?
(See
PCM
INSPECTION [LF]
.)
Yes
Go to the next step.
No
APP1, APP2 PIDs:
Inspect if output signal from
accelerator pedal position sensor
changes smoothly.
RPM PID:
Inspect the CKP sensor and
related wiring harness for
vibration or intermittent
open/short circuit.
VPWR PID:
Inspect for open circuit
intermittently.
MAF PID:
Inspect for open circuit of the
MAF sensor and related wiring
harness intermittently.
TP PID:
Inspect if output signal from TP
sensor changes smoothly.
VSS PID:
Inspect for open circuit of VSS
and related wiring harness
intermittently.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:10 PM
Page 64
© 2005 Mitchell Repair Information Company, LLC.