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Base Idle Speed

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Hyundai XG350, 2003 Hyundai Tiburon, 2003 Hyundai Sonata, 2003 Hyundai Santa Fe, and 2003 Hyundai Elantra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before checking engine idle speed, ensure spark plugs, injectors, and Idle Speed Control (ISC) actuator are operating properly. Check engine mechanical condition and ensure compression is within specification. Idle speed is controlled by ISC actuator and is not adjustable.
  1. Ensure coolant temperature is 176-205°F (80-95°C). Turn lights and all accessories off. DO NOT check base idle speed while cooling fan is operating. Set transaxle in Park or Neutral (A/T) or Neutral (M/T). On vehicles equipped with power steering, ensure front wheels are pointed straight-ahead. Connect a tachometer to the primary coil side or a Hi-Scan Pro tool or equivalent to Data Link Connector (DLC). Located at lower crash pad, below steering column. See Fig 1.
  2. Start engine and allow it to idle. Increase engine speed to 2000-3000 RPM for at least 5 seconds and then allow engine to idle. Check and ensure timing is as specified. See IGNITION TIMING SPECIFICATIONS  table.
  3. Operate engine at idle for at least 2 minutes before checking idle speed. See BASE IDLE SPEED SPECIFICATIONS  table. If idle speed is not within specification, check for Diagnostic Trouble Codes (DTCs). If there are DTCs present, see appropriate DTC testing procedure under DIAGNOSTIC TEST in appropriate SELF-DIAGNOSTICS article. If no codes are present, go to TROUBLE SHOOTING - NO CODES article.
BASE IDLE SPEED SPECIFICATIONS

Application (1) RPM
Accent 650-850
Elantra 600-800
Santa Fe
2.4L 700-900
2.7L 600-800
3.5L (2)
Sonata
2.4L 600-800
2.7L 750-950
Tiburon
2.0L 600-800
2.7L 650-750
XG350 600-800
(1) Check idle speed with engine warmed up, lights and accessories off, transmission in Park or Neutral, and steering wheel straight ahead.
(2) For information on Santa Fe with 3.5L, refer to FUEL SYSTEM (3.5L) article.
Fig 1: Locating Data Link Connector
G00217246Courtesy of HYUNDAI MOTOR CO.
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