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.
Self-Diagnostic System: Notes
The PCM overwrites data and monitors the EVAP system for up to 60 minutes after the ignition is turned off. Jumping the SCS line after turning ignition off cancels this function. Disconnecting the PCM during this function, without jumping the SCS line first, can damage the PCM. When removing/installing PCM or disconnecting PCM connectors, steps 1 - 3 must be followed to protect the powertrain control module (PCM) from damage, or wait at least 60 minutes before disconnecting. See the following:
- With ignition on, connect the Honda PGM Tester or the HDS to the data link connector (DLC) and go into any of the live data screens.
- Turn ignition off.
- Turn the Honda PGM Tester off or close the HDS and then back on. Go to the SCS mode and follow the screens to ground the 16-pin DLC.
NO RELATED
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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.