KOER Self Test

NOTE:

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.
Idle the engine.
After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- When using the IDS (laptop PC)
  1. Select "Self Test".
  2. Select "Modules".
  3. Select "PCM".
- When using the PDS (Pocket PC)
  1. Select "Module Tests".
  2. Select "PCM".
  3. Select "Self Test".
  Fig 1: Identifying DLC-2 Location
  Courtesy of MAZDA MOTORS CORP.
Then, select the "KOER On Demand Self Test" and perform procedures according to 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". (See AFTER REPAIR PROCEDURE .)