Idle Speed: Inspection

WARNING: This page is about a different car, the 2019 Subaru Ascent. 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 RPM (no load and select lever in "P" or "N" range):
  
  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 RPM (A/C ON and select lever in "P" or "N" range):
  
  Standard
  
  800 - 885±100 r/min