PCM Idle Learn Procedure: Procedure

The idle learn procedure must be done so the PCM can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of these actions:

• Replace the PCM.
• Reset the PCM.
• Update the PCM.
• Replace or clean the throttle body.
• When the engine or transmission is disassembled.

1. PCM Idle - Learn

   Procedure 

   1. Make sure all electrical items (the A/C, the audio, the lights, etc.) are off.

   2. Reset the PCM with the HDS 

   3. Turn the vehicle to the ON mode, and wait 2 seconds.

   4. Start the engine. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, or until the engine coolant temperature reaches 194 deg.F (90 deg.C).

   5. Let the engine idle for about 5 minutes with the throttle fully closed.

   NOTE: If the radiator fan comes on, do not include its running time in the 5 minutes.