KOER Self Test
WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- If a KOER self test is performed with the engine coolant temperature at less than 60 °C {140 °F} , a DTC for the variable valve timing may be detected even if the variable valve timing is normal.
- For vehicles with the variable valve timing control, execute a KOER self test after the variable valve timing learning is finished.
- A KOER self test cannot be executed if the variable timing valve learning in not finished.
- The variable valve timing learning is cleared if the PCM backup power supply is interrupted (including battery removal), or after reprogramming.
- To perform variable valve timing learning, the engine speed needs to be increased momentarily to approx. 2, 000 rpm .
- Connect the M-MDS to the DLC-2.
- Start engine and run it at idle.
- After the vehicle is identified, access the ECT PID using the M-MDS.
- Verify the ECT PID value is above 60 °C {140 °F} .
- Select the following items from the initialization screen of the M-MDS.
- Select "Self Test".
- Select "Modules".
- Select "PCM".
- Then, select the "KOER On Demand Self Test" and perform procedures according to the directions on the M-MDS screen.
- Verify the DTC according to the directions on the M-MDS screen.
- If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
- After completion of repairs, clear all DTCs stored in the PCM, while referring to "AFTER REPAIR PROCEDURE".