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 MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 83 (ENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONS)IGNITION SYSTEMIGNITION TIMING

2004 Toyota Celica GT, Standard

Ignition Timing

2004 Toyota Celica GT, StandardSECTION Ignition Timing

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

IGNITION TIMING (DEGREES BTDC @ IDLE) ⁽¹⁾

Application

Base Timing

⁽²⁾ ECM Controlled Timing

ES300

⁽³⁾ 8-12

7-24

GS300 & GS430

⁽⁴⁾ 8-12

6-16

GX470

⁽⁴⁾ 8-12

⁽⁵⁾

IS300, LS430 & SC430

⁽³⁾ 8-12

6-16

LX470

⁽⁴⁾ 5-15

⁽⁵⁾

RX300

⁽⁴⁾ 8-12

10-25

⁽¹⁾	Check with engine at normal operating temperature, transmission/transaxle in Neutral, parking brake applied, and A/C and all accessories off.

⁽²⁾	With jumper wire removed from data link connector No. 1.

⁽³⁾	With Jumper Wire (SST 09843-18030) installed between data link connector No. 3 terminals TC and CG.

⁽⁴⁾	With Jumper Wire (SST 09843-18020) installed between data link connector No. 1 terminals TE1 and E1 on RX300 models, or terminals TC and E1 on other models.

⁽⁵⁾	Information is not available from manufacturer.

RENDER: 1.0x

NO RELATED

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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.