Mazda MX-5 Miata Sport 2007 Manual page 2012

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
DIAGNOSTIC PROCEDURE
POOR FUEL ECONOMY DIAGNOSTIC PROCEDURE TABLE
STEP
1
2
3
2007 Mazda MX-5 Miata Sport
INSPECTION
Inspect for the
following:
Air cleaner

element for
contamination
ATF level (AT)

Fuel quality

Coolant level

Brake dragging

Clutch slippage

(MT)
Are all items normal?
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?
Access ECT PID.
Drive vehicle while
monitoring PID.
(See PCM
INSPECTION [LF] .)
Is PID within
specification?
CAUTION:
Disconnecting/connecting quick

release connector without cleaning it
may cause damage to fuel pipe and
quick release connector. Always
clean quick release connector joint
area before
disconnecting/connecting, and make
sure that it is free of foreign material.
RESULTS
Yes Go to the next step.
No Service if necessary.
Repeat Step 1.
Yes DTC is displayed:
Go to the appropriate DTC
inspection.
(See DTC TABLE [LF] .)
No No DTC is displayed:
Go to the next step.
Yes Go to the next step.
No Inspect for coolant leakage,
cooling fan and condenser fan
operations or thermostat
operation.
ACTION