Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related Service Bulletins available?	Yes	Perform repair or diagnosis according to the available Service Bulletins. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT ENGINE COOLANT LEVEL WARNING: Never remove the cooling system cap or loosen the radiator drain plug while the engine is running, or when the engine and radiator are hot. Scalding engine coolant and steam may shoot out and cause serious injury. It may also damage the engine and cooling system. Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap Wrap a thick cloth around it and slowly turn it counterclockwise to the first stop Step back while the pressure escapes. When you're sure all the pressure is gone, press down on the cap using the cloth, turn it, and then remove it Is the engine coolant fill level correct?	Yes	Go to the next step
3		No	Inspect for a loss of engine coolant. Repair if necessary. (See ENGINE COOLANT LEVEL INSPECTION [MZI-3.7] .) Go to Step 5.
4	INSPECT SENSOR OPERATION Run the engine until the engine temperature stabilizes. Verify that the radiator hoses are hot and the cooling system is pressurized. Access the PCM and monitor the CHT PID. Is the temperature more than 77 °C {171 °F}?	Yes	The test is complete. Go to the next step.
4		No	Inspect the thermostat operation Repair if necessary. (See THERMOSTAT INSPECTION [MZI-3.7] .)
5	VERIFY TROUBLESHOOTING OF DTC P0128:00 HAS BEEN COMPLETED Verify that all disconnected connectors are reconnected. Switch the ignition to ON (Engine off). Clear the DTC from the PCM memory using the M-MDS. Cool down the engine and radiator. Start the engine and run it until the engine temperature stabilizes. Retrieve DTCs using the M-MDS. Is the PENDING CODE for this DTC present?	Yes	Replace PCM, then go to the next step (See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
5		No	Go to the next step
6	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE" (See AFTER REPAIR PROCEDURE [MZI-3.7] ) Are any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7] .)
6		No	Troubleshooting completed.