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.
System Diagram
When Ignition Switch is turned ON, ECM performs the following functions:
- To ensure full flow, the fuel pump is actuated via the FPCM (only at first time ignition ON after unlocking the vehicle).
- MIL (Malfunction Indicator Lamp) is actuated for the lamp check by the ECM via CAN communication.
- Malfunction memory in the ECM can be read out and deleted via the diagnosis tool.
- The Throttle Valve Actuator checks its return spring (by the position of the throttle valve) and adapts the position of the actuator, if necessary.
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.
No obligation. See pricing before you book.