Are there any DTCs
displayed?
No
No DTC is displayed:
Go to the next step.
5
Perform the electronic
throttle control system
operation inspection.
(See
ELECTRONIC
THROTTLE
CONTROL SYSTEM
INSPECTION
.)
Does the electronic
throttle control system
function properly?
Yes
Go to the next step.
No
Repair or replace the
malfunctioning part
according to electronic
throttle control system
operation inspection
results.
6
Disconnect the vacuum
hose between the purge
solenoid valve and the
intake manifold from
purge solenoid valve
side.
Plug opening end of
vacuum hose.
Drive the vehicle.
Does the engine
condition improve?
Yes
Inspect the evaporative
emission control system.
No
Go to the next step.
7
Connect the M-MDS or
equivalent to the DLC-2.
Access APP1, APP2, TP,
MAF and VSS PIDs.
Monitor each PID while
driving vehicle.
(See
PCM
INSPECTION [LF]
.)
Are PIDs normal?
Yes
Go to the next step.
No
APP1, APP2 PIDs:
Inspect the accelerator
pedal position sensor.
TP PID:
Inspect TP
sensor.
MAF PID:
Inspect MAF
sensor.
VSS PID:
Inspect VSS.
8
Access and monitor
BOO, CPP (MT),
CPP/PNP (MT), and TR
(AT) PIDs.
Are PIDs values normal?
(See
PCM
INSPECTION [LF]
.)
Yes
Go to the next step.
No
If the BOO PID is not
normal:
Inspect brake
switch, and related
wiring harness for
vibration or
intermittent
open/short circuit.
If the CPP PID is not
normal:
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:10 PM
Page 59
© 2005 Mitchell Repair Information Company, LLC.