1.Set the vehicle to the pre-inspection condition.

2.Turn the ignition switch to the "LOCK" (OFF) position and then connect the M.U.T.-III to the diagnosis connector (Refer to GROUP 00 - Precautions Before Service - M.U.T.-III Sub Assembly ).
3.Start the engine, and let it run at idle.
4.Check the idle speed. Select the item No. 2 of the Data List, Engine Revolution, and take a reading of the idle speed.
Standard value: 650 ± 50 r/min
5.If the idle speed is not within the standard value, inspect the diesel system (Refer to GROUP 13D - Troubleshooting - Inspection Chart for Trouble Symptoms ).