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) (H4DO)>ENGINE CONTROL MODULE (ECM)
.CAUTION:
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.
CAUTION:- To prevent damage to the connector, when connecting the connector to ECM, insert the connector straight in until it stops, and while maintaining the position, lock the lever. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM) .
- Affix the check board the using tape (A) so that it may not contact the vibrating portion such as engine.
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.
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