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.
2004 Honda S2000 L4-2.2LFACTORY OEM SERVICE PROCEDURE
Ignition Timing: Testing and Inspection
Ignition Timing Inspection
1. Connect the HDS to the data link connector (DLC), and check for DTC's. If a DTC is present, diagnose and repair the cause before inspecting the ignition timing.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in Neutral) until the radiator fan comes on, then let it idle.
3. Check the idle speed, and adjust it if necessary.
4. Follow the tester's prompts to get the tester in the "SCS" mode (see Tester Operator's Manual)
5. Connect the timing light to the No.1 ignition coil wire.
6. Aim the light toward the pointer (A). Check the ignition timing under no load conditions:
headlights, blower fan, and air conditioner are not operating. If the ignition tinning differs from the specification given, replace the Engine Control Module (ECM).
7. Turn the ignition switch OFF.
8. Disconnect the HDS and the timing light.
1. Connect the HDS to the data link connector (DLC), and check for DTC's. If a DTC is present, diagnose and repair the cause before inspecting the ignition timing.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in Neutral) until the radiator fan comes on, then let it idle.
3. Check the idle speed, and adjust it if necessary.
4. Follow the tester's prompts to get the tester in the "SCS" mode (see Tester Operator's Manual)
5. Connect the timing light to the No.1 ignition coil wire.
6. Aim the light toward the pointer (A). Check the ignition timing under no load conditions:
headlights, blower fan, and air conditioner are not operating. If the ignition tinning differs from the specification given, replace the Engine Control Module (ECM).
7. Turn the ignition switch OFF.
8. Disconnect the HDS and the timing light.
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.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.