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.
12 00 Contents of Engine Electrical System General
General Information Working on ignition system See 12 00 ... INFORMATION ON WORKING ON IGNITION SYSTEM
Removing and installing electronic control units See 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS
Welding work (overload protection of control units) See 12 00 ... INSTRUCTIONS FOR WELDING WORK (OVERLOAD PROTECTION OF CONTROL UNITS)
Disconnecting and connecting battery See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY
Disconnecting and connecting test equipment See 12 00 ... INSTRUCTIONS FOR CONNECTING AND DISCONNECTING TEST UNITS
Component inspection: See 12 00 ... INSTRUCTIONS ON COMPONENT INSPECTION
External jump-starting aid See 12 00 ... INSTRUCTIONS ON STARTING AID
Compression testing
Use the Manual With the Right Hardware
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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.
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