Mazda RX-8 Manual page 75

Vacuum leak
•
Proper fuel quality (e.g.
•
proper octane,
contamination,
winter/summer blend)
Blockage at intake-air
•
system (between MAF
sensor and intake ports)
Loose bands on intake-air
•
system hoses
Cracks in intake-air
•
system
Air cleaner restriction
•
Jet air mixing system air
•
passage (clogging or
leakage)
MAF sensor installation
•
Are all the items normal?
Connect the WDS or equivalent
to the DLC-2.
Turn the ignition switch to the ON
3
position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Connect the WDS or equivalent
to the DLC-2.
Access the ECT PID.
Inspect the readings on both the
4 ECT PID and the temperature
gauge on the instrument cluster
readings.
Does the ECT PID indicate the
same temperature as the gauge
readings?
5 Is the engine overheating?
Service if necessary.
No
Repeat Step 2.
Go to the applicable DTC inspection.
Yes
(See DTC TABLE .)
No Go to the next step.
Yes Go to the next step.
If temperature gauge is in the normal range
but the ECT PID is not the same as the
temperature gauge reading, inspect the ECT
sensor.
(See ENGINE COOLANT
TEMPERATURE (ECT) SENSOR
No INSPECTION .)
If the temperature gauge on instrument
cluster indicates the cold range but the ECT
PID is normal, inspect the temperature gauge
and the sending unit.
(See Water temperature gauge .)
Go to the symptom troubleshooting "No.17
Cooling system concerns − Overheating".
Yes
(See NO.17 COOLING SYSTEM
CONCERNS-OVERHEATING .)
(w) RX8-Engine Troubleshooting
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