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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 35 (ENGINE PERFORMANCE SYSTEM SELF-DIAGNOSTICS)SELF-DIAGNOSTIC SYSTEMECM/PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES

2004 Acura 3.5RL

ECM/Pcm Reset Procedure/Clearing Diagnostic Trouble Codes

2004 Acura 3.5RLSECTION ECM/Pcm Reset Procedure/Clearing Diagnostic Trouble Codes

WARNING: This page is about a different car, the 2003 Acura RSX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Some models have an anti-theft code built into radio circuit. Clearing codes cancels clock and radio settings; make note of anti-theft code and station presets before beginning reset procedure. After ECM/PCM reset, radio will not operate until anti-theft code is entered.

To reset Powertrain Control Module (ECM/PCM) (clear codes), use Honda PGM tester or OBD-II scan tool following manufacturer's instructions. Codes can also be cleared by turning ignition off and removing BACK UP (RADIO) fuse (7.5-amp) from underhood fuse/relay block (located next to battery). On all models, leave fuse out for at least 10 seconds to reset ECM/PCM. Remove SCS service connector, if connected. Disconnect Honda PGM Tester or scan tool from DLC.

NOTE: If service check connector is connected and no DTC is stored in ECM/PCM, MIL will remain on when the ignition is turned on.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.