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.
CKP Pattern Clear/CKP Pattern Learn Procedure: Procedure
NOTE:
- Clearing the DTCs with the HDS does not require you to do this procedure.
- The PCM memorizes the learning status in its memory an hour after turning the vehicle to the OFF (LOCK) mode. If you need to disconnect the 12 volt battery terminals before memorizing the learning status in the PCM, jump the SCS line with the HDS, and wait 60 seconds, then disconnect the 12 volt battery terminals.
Clear/Learn Procedure (with the HDS)
- HDS - Connect
- CKP Pattern - Clear/Learn
1. Select the PGM-FI System with the HDS. 2. Select CRANK PATTERN in the Adjustment Menu with the HDS.
3. Select CRANK PATTERN CLEAR with the HDS, and clear the CKP pattern.
4. Select CRANK PATTERN LEARNING with the HDS, and follow the screen prompts.
5. Turn the vehicle to the OFF (LOCK) mode.
6. Jump the SCS line with the HDS.
7. Wait 60 seconds, and exit the SCS mode with the HDS.
Learn Procedure (without the HDS)
- CKP Pattern - Learn
1. Start the engine. Warm up the engine by raising the engine speed around 3, 000 rpm until the cooling fan comes on, then let it idle. 2. Test-drive the vehicle on a level road: Decelerate (with the throttle fully closed) from an engine speed of 2, 500 rpm down to 1, 700 rpm with the transmission in D.
3. Repeat step 2 several times.
4. Turn the vehicle to the OFF (LOCK) mode.
5. Turn the vehicle to the ON mode, and wait 30 seconds.
6. Turn the vehicle to the OFF (LOCK) mode, and wait an hour. The CKP pattern learn procedure is complete.
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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