Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA1999CELICA 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROLS - ON-VEHICLE ADJUSTMENTS - 4-CYLINDERIGNITION TIMING4-CYLINDER IGNITION TIMINGCOROLLA
1999 Toyota Celica 2D Convertible, Standard
4-Cylinder Ignition Timing: Corolla
1999 Toyota Celica 2D Convertible, StandardSECTION Corolla
- Start engine and warm engine to normal operating temperature. Shut engine off. Connect timing light to spark plug wire on cylinder No. 1. Cylinder No. 1 is front cylinder at timing chain end of engine.
- Connect scan tool to data link connector No. 3. See Figure. Scan tool is used to read engine RPM.
- Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 on data link connector No. 1. See Figure. Data link connector No. 1 is located at driver's side of engine compartment, near strut tower.
- Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at 1000-1300 RPM for 5 seconds and then ensure engine returns to idle.
- Timing marks are located on timing chain cover, near crankshaft pulley. Ensure base timing is within specification at idle with transaxle in Neutral, and with A/C and all accessories off. See IGNITION TIMING SPECIFICATIONS table.
- Remove jumper wire from data link connector No. 1. Ensure ECM controlled timing is within specification. See IGNITION TIMING SPECIFICATIONS table. Shut engine off. Remove timing light and scan tool.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.