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.
Retrieving DTC Using Scan Tool
2004 Acura 3.5RLSECTION Retrieving DTC Using Scan Tool
- If DTC exists, "D4" indicator light on A/T gear position indicator on instrument panel will blink when ignition is turned on. To retrieve DTC using scan tool, turn ignition off.
- Connect scan tool to Data Link Connector (DLC) located near ashtray. Turn ignition on. Follow scan tool manufacturer's instructions. Scan tool will indicate DTC.
- Once DTC is obtained, turn ignition off. Determine probable cause and symptom. See DTC/FLASH CODE DEFINITIONS table. Repair as necessary. See DIAGNOSTIC TESTS .
- If any other DTCs except those listed are displayed, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If "D4" indicator light does not flash or stays on, see "D4" INDICATOR LIGHT INOPERATIVE or "D4" INDICATOR LIGHT REMAINS ON under SYMPTOM TESTS.
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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.