IGNITION TIMING (DEGREES BTDC @ IDLE) (4-CYLINDER) ⁽¹⁾

Application

Base Timing

ECM Controlled Timing

Camry, Camry Solara, Corolla, Highlander & Matrix

⁽²⁾ 8-12

⁽³⁾ 5-15

Celica

1.8L (1ZZ-FE)

10-18

⁽⁷⁾

1.8L (2ZZ-GE)

8-12

⁽⁷⁾

ECHO

8-12 ⁽⁴⁾

⁽⁷⁾

MR2 ⁽⁵⁾

⁽²⁾ 8-12

⁽³⁾ 6-15

Prius ⁽⁶⁾

7-15

⁽⁷⁾

RAV4 ⁽⁸⁾

⁽²⁾ 8-12

⁽³⁾ 5-15

Tacoma

⁽²⁾ 3-7

⁽³⁾ 4-17

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

⁽²⁾	With Jumper Wire (SST 09843-18020 or SST 09843-18040) installed between terminals No. 4 (CG) and 13 (TC) on DLC3. See Figure.

⁽³⁾	With jumper wire removed from DLC3.

⁽⁴⁾	With OBD II scan tool connected to DLC3 connector.

⁽⁵⁾	Connect timing light to Black/Red service wire in J/B box No.1 in engine compartment. See Figure.

⁽⁶⁾	Read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS . Check with transit in inspection mode and transaxle in Park.

⁽⁷⁾	Information is not available from manufacturer.

⁽⁸⁾	Connect timing light to Black/White service wire in engine compartment near driver side of air intake housing. See Figure.

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.

Safety Warning

Ignition Timing (4-Cylinder)