( TL19E3AA20336124601MBAT00 )

ECM/PCM Idle Learn Procedure

The idle learn procedure must be done so the ECM/PCM can learn the engine idle characteristics.
Do the idle learn procedure whenever you do any of these actions:

- Replace the ECM/PCM.
- Reset the ECM/PCM.
- Update the ECM/PCM.
- Replace or clean the throttle body.
- When the engine or transmission is disassembled.

NOTE: Clearing the DTCs with the HDS does not require you to do the idle learn procedure.
Procedure

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

1. Reset the ECM/PCM with the HDS.

1. Turn the ignition switch to ON (II), and wait 2 seconds.

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, or until the engine coolant temperature reaches 90 °C (194 °F).

1. 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.

1. Verify on the HDS data list that the idle learn procedure is complete.