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.
How To Use Check Board
- Turn the ignition switch to OFF.
- Disconnect the connector from ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM)>REMOVALCAUTION:
Make sure that the lock is released before moving the lever in order to avoid damaging the connector.
- Connect the ECM connector to the check board.
- Connect the ECM connector (C) to ECM.CAUTION:
Use the measurement connector (B) with part label (A) when measuring the voltage, current and resistance. If you insert a taper pin for measurement into the ECM connector (C) by mistake, do not use the check board again, otherwise a malfunction (poor contact, etc.) may occur on the vehicle.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.