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 ECM/PCM.
- Reset ECM/PCM.
- Update ECM/PCM.
- Replace or clean the throttle body.
NOTE: Erasing DTCs with the HDS does not require you to do the idle learn procedure.
|1.||Make sure all electrical items (A/C, audio, lights, etc.) are off.|
|2.||Reset the ECM/PCM with the HDS.|
|3.||Turn the ignition switch ON (II), and wait 2 seconds.|
|4.||Start the engine. Hold the engine speed at 3,000 rpm (min-1) without load (in Park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 90 °C (194 °F).|
|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.
|6.||Verify on the HDS data list that the idle learn procedure is complete.|