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.
2003 Acura MDX BaseFACTORY OEM SERVICE PROCEDURE
CKP Pattern Learn Procedure
NOTE:
Enable criteria: Engine coolant temperature must be 176°F (80°C) or higher.
- Having cleared the CKP pattern from PCM, leave Honda PGM Tester or the HDS connected to DLC and turn ignition switch off. Turn ignition switch on. Wait for 30 seconds.
- Start vehicle and test drive on a level road. Decelerate (with throttle fully closed) from engine speed of 2500 RPM to 1000 RPM with A/T in "2" or "D3" position.
- Stop vehicle. DO NOT turn the ignition switch off. Select the ALL DATA list in DATA LIST menu using Honda PGM Tester or the HDS .
- Check status of PULSER F/B LEARN. If it is set to NG, enable criteria was probably not met; repeat the procedure from beginning.
Factory Service Tools
Use the Manual With the Right Hardware
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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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