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Ignition Timing

CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. DO NOT  allow tachometer terminal to become grounded to avoid possible damage to ignitor and/or coil.
  1. Ensure engine is at normal operating temperature. Connect timing light to engine. Connect tachometer to proper location. See Fig 1 through Fig 5.
  2. Install jumper wire between proper terminals of engine check connector. See Fig 6 through Fig 9. Ensure idle speed is within specification. See IDLE SPEED SPECIFICATIONS  table. Ensure base timing is within specification. See 4-CYLINDER IGNITION TIMING (Degrees BTDC @ RPM) table. Adjust timing by turning distributor.
  3. Remove jumper wire from engine check connector and ensure advance timing is within specification. See 4-CYLINDER IGNITION TIMING  (Degrees BTDC @ RPM) table.
4-CYLINDER IGNITION TIMING (Degrees BTDC @ RPM)

Application/ Model Base Timing Degrees @ RPM Advance Timing Degrees @ Idle
Camry (3S-FE Engine) 10 @ 650 13-22
Celica
3S-GTE Engine 10 @ 800 12-21
4A-FE Engine 10 @ 800 5-15
5S-FE Engine 10 @ 700 13-22
Corolla
4A-FE Engine 10 @ 800 (1) 5-15
4A-GE Engine 10 @ 800 Approx. 16
Pickup & 4Runner 5 @ 750 (2) 10-14
Tercel (3E-E Engine) 10 @ 800 7-17
(1) 700 RPM on 4WD models.
(2) 850 RPM on Pickup 4WD models with A/T.
Fig 1: Installing Tachometer (Camry 3S-FE)
G118450Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Installing Tachometer (Corolla)
G118452Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Installing Tachometer (Celica)
G118453Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Installing Tachometer (4Runner 22R-E)
G118455Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Installing Tachometer (Pickup)
G118458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 6: Installing Engine Check Connector Jumper Wire (Camry)
G118461Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 7: Installing Engine Check Connector Jumper Wire (Celica)
G118463Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 8: Installing Engine Check Connector Jumper Wire (Corolla)
G118465Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 9: Pickup/4Runner Engine Check Connector Jumper Wire Installation
G118464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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