Idle Control System

Idle Speed Inspection

 11-285  

NOTE:
  • Leave the Idle Air Control (IAC) valve connected.
  • Before checking the idle speed, check these items:
  • The Malfunction Indicator Lamp (MIL) has not been reported on.
  • Ignition timing
  • Spark plugs
  • Air cleaner
  • PCV system
  1. Disconnect the Evaporative Emission (EVAP) canister purge valve 2P connector (except D15Y3 (PA, KW, KT, KN models), D16W9 (PA model), D17A5 (KN model) engines).
  2. Connect a tachometer (A) to the test tachometer connector (B).

  1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
  2. Check the idle speed with no-load conditions: headlights, blower fan, radiator fan, and air conditioner are not operating.

    Idle speed should be:

    D15Y5, D15Y2, D16W8, D17A1, D17Z1, D17Z2, D17Z5, D17A2, D17Z3 engines:
    M/T 720+50 rpm (min-1)
    A/T, CVT 720+50 rpm (min-1)

    (in Park or neutral)
    except D15Y5, D15Y2, D16W8, D17A1, D17Z1, D17Z2, D17Z5, D17A2, D17Z3 engines:
    M/T 750+50 rpm (min-1)
    A/T, CVT 750+50 rpm (min-1)

    (in Park or neutral)

  1. Idle the engine for 1 minute with heater fan switch on HI and air conditioner on, then check the idle speed.

Idle speed should be:

D15Y5, D15Y2, D16W8, D17A1, D17Z1, D17Z2, D17Z5, D17A2, D17Z3 engines:
M/T 720+50 rpm (min-1)
A/T, CVT 720+50 rpm (min-1)

(in Park or neutral)
except D15Y5, D15Y2, D16W8, D17A1, D17Z1, D17Z2, D17Z5, D17A2, D17Z3 engines:
M/T 750+50 rpm (min-1)
A/T, CVT 750+50 rpm (min-1)

(in Park or neutral)

NOTE: If the idle speed in not within specification, see Symptom Chart.

  1. Reconnect the EVAP canister purge valve 2P connector (except D15Y3 (PA, KW, KT, KN models), D16W9 (PA model), D17A5 (KN model) engines).