Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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KOEO/KOER Self Test




KOEO/KOER SELF TEST [MZI-3.7]

1. Connect the M-MDS to the DLC-2.






2. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

- When using the IDS (laptop PC)

- Select "Self Test".
- Select "Modules".
- Select "PCM".

- When using the PDS (Pocket PC)

- Select "Module Tests".
- Select "PCM".
- Select "Self Test".

3. Then, select the "KOEO On Demand Self Test" or "KOER On Demand Self Test" and perform procedures according to directions on the M-MDS screen.

4. 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.

5. After completion of repairs, clear all DTCs stored in the PCM, while referring to "AFTER REPAIR PROCEDURE".