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.

2001 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Ignition Timing: Inspection

Activate Transit To Inspection Mode And Warm Up Engine ( PRECAUTION ) .
Allow the engine to warm up to normal operating temperature.
Connect Toyota Hand-Held Tester
1. Connect the TOYOTA hand-held tester to the DLC3.
  
  Fig 1: Connecting TOYOTA Hand-Held Tester To DLC3 Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Please refer to the TOYOTA hand-held tester operator's for further details.
Connect Timing Light To Engine .
Using a timing light, check the ignition timing.

Fig 2: Checking Ignition Timing
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Ignition timing: 7 - 15° BTDC @ idle (Transmission in parking range)
Disconnect Timing Light From Engine .
Disconnect Toyota Hand-Held Tester .
Stop Engine .

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.