Mazda MX-5 Miata Sport 2007 Manual page 2020

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
COOLING SYSTEM CONCERNS-OVERHEATING DIAGNOSTIC PROCEDURE TABLE
STEP
1
2
3
2007 Mazda MX-5 Miata Sport
INSPECTION
Inspect the following:
Engine coolant level

Coolant leakage

Water and anti-freeze

mixture
Radiator condition

Collapsed or restricted

radiator hoses
Radiator pressure cap

Overflow system

Fan rotational direction

Fuses

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?
Start the engine and idle it.
Turn the A/C switch on and set
A/C system operation is improper

Improper water/anti-freeze mixture

Fans reverse rotation

Poor radiator condition

Thermostat malfunction

Radiator hoses damage

Improper or damaged radiator cap

Cooling fan is inoperative.

Coolant overflow system malfunction

Improper tension of drive belt

Drive belt damage

RESULTS
Yes
No
Yes
No
Yes
No
ACTION
Go to the next step.
Service if necessary.
Repeat Step 1.
DTC is displayed:
Go to the appropriate
DTC inspection.
(See DTC TABLE
[LF] .)
No DTC is displayed:
Go to the next step.
Go to Step 5.
Inspect for the