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
- Clearing the DTCs with the HDS does not require you to do this procedure.
- The PCM memorizes the learning status in its memory after passed an hour from turning the vehicle to the OFF (LOCK) mode. If you need to disconnect the battery terminals before memorizing the learning status in the PCM, jump the SCS line with the HDS, and wait 60 seconds, then disconnect the battery terminals.
Clear/Learn Procedure (with the HDS)
- HDS - Connect
1. Turn the vehicle to the ON mode, but do not start the engine. 2. Connect the HDS to the DLC (A) located under the driver's side of the dashboard.
3. Make sure the HDS communicates with the PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting - Refer to: DLC Circuit Troubleshooting (2014 2015), or DLC Circuit Troubleshooting (2019 2020), or DLC Circuit Troubleshooting(Without CAN Gateway) (2016), or DLC Circuit Troubleshooting(With CAN Gateway) (2016), or DLC Circuit Troubleshooting (2017 2018), or DLC Circuit Troubleshooting (2017 2018)
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- CKP Pattern - Clear/Learn
1. Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS. 2. Select CRANK PATTERN CLEAR with the HDS, and clear the CKP pattern.
3. Select CRANK PATTERN LEARNING with the HDS, and follow the screen prompts.
4. Turn the vehicle to the OFF (LOCK) mode.
5. Jump the SCS line with the HDS.
6. Wait 60 seconds, and exit the SCS mode with the HDS.
Learn Procedure (without the HDS)
- CKP Pattern - Learn
1. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on. 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 2nd.
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. The CKP pattern learn procedure is complete.
6. Turn the vehicle to the OFF (LOCK) mode, and wait an hour. The CKP pattern learn procedure is complete.
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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.