How to Troubleshoot the Fuel and Emissions Systems
CKP Pattern Clear/CKP Pattern Learn
Clear/Learn Procedure (with the HDS)
  1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
  1. Turn the ignition switch to ON (II).
  1. Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting.
  1. Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS.
  1. Select CRANK PATTERN LEARNING with the HDS, and follow the screen prompts.
  1. The CKP pattern learn procedure is complete.
Learn Procedure (without the HDS)
  1. Start the engine. Hold the engine speed at 3,000 rpm (min −1 ) without load (A/T in P or N, M/T in neutral) until the radiator fan comes on.
  1. Test-drive the vehicle on a level road: Decelerate (with the throttle fully closed) from an engine speed of 2,500 rpm (min −1 ) down to 1,000 rpm (min −1 ) with the A/T in 2 position, or the M/T in 1st gear.
  1. Repeat Step 2 several times.
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II), and wait 30 seconds. The CKP pattern learn procedure is complete.