PCM Idle Learn Procedure

Service Information

PCM Idle Learn Procedure

Procedure

1. HDS DLC - Connection





1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

2. PCM - Reset

1. Reset the PCM with the HDS while the engine is stopped.

2. Turn the ignition switch to LOCK (0).

3. Turn the ignition switch to ON (II) and wait 30 seconds.

3. PCM - Idle Learn

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.

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.

2. Turn the ignition switch to ON (II).

3. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, or until the engine coolant temperature reaches 194 °F (90 °C).

4. 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.

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