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Idle Speed: Samurai

  1. Start engine, and warm it to normal operating temperature. Install spare fuse into diagnosis terminal of fuse box, and ensure Malfunction Indicator Light (MIL) indicates Code 12. See Fig 1 .
  2. Turn engine off. Connect Duty Meter (99963-00006) to monitor coupler duty check terminal "A" and ground terminal "C". See Figure . Test connector is located near battery. Turn ignition on, and wait 5 seconds.
  3. Start engine, run it at 2000 RPM for 5 minutes and then return it to idle. Using duty meter, ensure idle speed and IAC duty percentage are within specification. See IDLE SPEED SPECIFICATIONS  and IAC DUTY AT SPECIFIED IDLE SPEED  tables. If idle speed and/or IAC duty percentage require adjustment, remove idle speed adjusting screw protective cap on throttle body. To adjust idle speed, turn adjusting screw. See Fig 2 .
  4. When idle speed and IAC duty percentage are within specification and vehicle is equipped with A/C, go to step 5). If vehicle is not equipped with A/C, reinstall idle speed adjusting screw protective cap to throttle body. Remove duty meter from monitor coupler, and rein-stall cap. Remove spare fuse from diagnosis terminal of fuse box.
  5. Turn A/C on, and set fan switch to LOW position. Check idle speed and IAC duty percentage. If idle speed and/or IAC duty percentage is not within specification, turn A/C VSV adjusting screw to adjust idle. See Fig 3 .
Fig 1: Installing Diagnosis Terminal Fuse (Samurai)
G90A18010Courtesy of SUZUKI OF AMERICA CORP.
Fig 2: Locating Idle Speed Adjusting Screw (Typical)
G90C20786Courtesy of SUZUKI OF AMERICA CORP.
Fig 3: Locating A/C VSV Adjusting Screw (Samurai & Sidekick)
G90D20787Courtesy of SUZUKI OF AMERICA CORP.
IDLE SPEED SPECIFICATIONS (1)

Application Idle RPM
Samurai
With A/C Off 750-850
With A/C On (2) 950-1050
Sidekick
With A/C Off 750-850
With A/C On (3) 950-1050
Swift
DOHC
With A/C Off 800-900
With A/C On (2) 850-950
SOHC
With A/C Off
Auto. Transaxle 800-900
Man. Transaxle 700-800
With A/C On
Auto. Transaxle (4) (2) 800-900
Man. Transaxle (4) (2) 700-800
Auto. & Man. Transaxles (5) 850-950
(1) Transaxle or transmission in Neutral or Park.
(2) A/C idle speed is adjusted by rotating adjusting screw on A/C Vacuum Switching Valve (VSV).
(3) With auto. transmission in gear, idle RPM is 750-850.
(4) When ECM part number ends with "0".
(5) When ECM part number ends with number other than "0".
IAC DUTY AT SPECIFIED IDLE SPEED (1)

Application Percent
Samurai & Sidekick 50
Swift
DOHC 30-40
SOHC (2) 25-35
(1) See the IDLE SPEED SPECIFICATIONS  table.
(2) With A/C turned off (if equipped).
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