Idle Speed: Testing and Inspection
On-Car ServiceEngine Idle Speed
1. Before checking idle speed, check the following:
1. Ensure that air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and that hoses are connected properly.
2. Ensure that malfunction indicator lamp is OFF.
2. Warm-up the engine.
3. Connect Select Monitor and measure engine speed.
CAUTION: When connecting Select Monitor, turn ignition switch to OFF.
NOTE: Engine speed is indicated on Select Monitor by selecting "MODE F04".
NOTE:
- When Select Monitor is not used, attach the pickup sensor on tachometer (Secondary pickup type) to #1 plug cord.
- This ignition system provides simultaneous ignition for #1 and #2 plugs. It must be noted that some tachometers may register twice that of actual engine speed.
4. Check idle speed when unloaded (with headlights, heater fan, rear defroster, radiator fan, air conditioning, etc. OFF).
Idle speed (No load and gears in neutral position): 700 ± 100 rpm
5. Check idle speed when loaded. (Turn air conditioning switch to "ON" and operate compressor for at least one minute before measurement.)
Idle speed (A/C switch "ON"): 850 ± 50 rpm
CAUTION: Never rotate idle adjusting screw, if idle speed is outside specifications, refer to General On-board Diagnosis Table under "Fuel Injection System".