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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 RESULTS ACTION
1 Connect the M-MDS to the DLC-2.
Switch the ignition to ON (Engine off).
Retrieve any DTCs
Are there any DTCs displayed?		 Yes DTC is displayed: 
Go to the appropriate DTC inspection
(See DTC TABLE [L5] .)
No No DTC is displayed: 
Go to the next step
2 Remove thermostat and inspect operation.
(See THERMOSTAT REMOVAL/INSTALLATION [L5] .)
(See THERMOSTAT INSPECTION [L5] .)
Is thermostat normal?		 Yes ECT and thermostat are normal
Go to the next step.
No Access the ECT PID on the M-MDS.
Inspect both the ECT PID and temperature gauge on instrument cluster readings.
If the temperature gauge on instrument cluster indicates a normal range but the ECT PID is not the same as the temperature gauge reading, inspect the ECT sensor.
If the temperature gauge on the instrument cluster indicates a cold range but the ECT PID is normal, inspect the temperature gauge and heat gauge unit.
3 Access the PSP PID using the M-MDS.
Do the PIDs indicate the correct values under trouble condition?		 Yes Go to the next step.
No Inspect and repair or replace power steering pressure switch and the related harnesses.
(See POWER STEERING PRESSURE (PSP) SWITCH INSPECTION [L5] .)
If the malfunction remains, perform the intermittent concern troubleshooting procedure.
(See INTERMITTENT CONCERN TROUBLESHOOTING [L5] .)
4 Is the throttle body free of contamination? Yes Inspect for air leakage from the intake air system components while racing the engine to higher speed.
No Clean or replace throttle body.
5
  • Verify test results
    • If normal, return to diagnostic index to service any additional symptoms

      (See SYMPTOM DIAGNOSTIC INDEX [L5] )

    • If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis
      • If the vehicle is repaired, troubleshooting is completed
      • If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest
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