Idle Speed: Inspection

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

Before checking the idle speed, check the following item:
1. Check the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly.
2. Check the malfunction indicator light does not illuminate.
Warm up the engine.
Read the engine idle speed using Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DATA MONITOR>OPERATION
NOTE:
- Idle speed cannot be adjusted manually, because the idle speed is automatically adjusted.
- If idle speed is out of standard, refer to the basic diagnostic procedure of "ENGINE (DIAGNOSTICS)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE
1. Check the idle speed when no-loaded. (Headlight, blower fan, rear defroster, radiator fan, A/C etc. are OFF)
  Idle speed (No load, and for CVT model, select lever in "P" or "N" range. For MT model, gear shift lever in neutral position.):
  
  Standard
  
  700±100 r/min
2. Check the idle speed when loaded. (Turn the A/C switch to ON and operate the compressor for at least one minute before measurement.)
  Idle speed (A/C on, and for CVT model, select lever in "P" or "N" range. For MT model, gear shift lever in neutral position.):
  
  Standard
  
  700 - 880±100 r/min