Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
On-demand Self-test: Notes
- Connect the M-MDS to the DLC-2.
- When performing the body control module (BCM) self-test, verify that the vehicle is under the following conditions.
When performing the KOEO On-Demand self-test for Door Lock System:
- All doors, hood, trunk (4SD)/liftgate (5HB) are closed
- All doors are unlocked
When performing the KOEO On-Demand self-test for Lighting Systems:
- Hazard warning switch is off
- Light switch is off
- Rear window defogger switch is off
- Selector lever is in position other than R (ATX)/shift lever is in position other than reverse (MTX)
- Switch the ignition ON (engine off or on).
- Perform the vehicle identification.
- Perform the following procedure using the M-MDS.
- Press [Start] for the vehicle identification.
- Press the [Toolbox] tab.
- Press the [Diagnosis] icon.
- Press [On-demand self-test].
- Press the applicable [M-MDS display name] from the module table. (See Module table .)
- Press [Run] for the applicable [Self-test type] from the module table. (See Module table .)
- Verify DTCs following the instructions on the screen.
- If a DTC is displayed, repair the malfunctioning location according to the applicable DTC troubleshooting.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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