Vehicle Damage Warnings
BATTERYNOTE: Before removing battery ground, access trouble codes. Powertrain Control Module (PCM) memory is erased when ground cable is removed.
^ Batteries produce explosive hydrogen gas. Avoid creating sparks near battery.
^ Ensure battery is properly connected prior to attempting to start engine.
^ Do not disconnect battery when engine is running.
^ Disconnect battery cables when charging battery.
^ Disconnect the battery ground when replacing electronic components.
ELECTRICAL AND ELECTRONICS
^ Never connect or disconnect electrical connections with ignition "ON" unless specifically directed to do so in a test procedure.
^ Do not use a self powered test lamp to check continuity.
^ Do not create arcing to check circuit continuity.
^ When measuring voltage at control unit harness connector, disconnect harness connector first, then turn ignition "ON" as necessary.
^ Always use 12V battery as a power source.
^ Never apply battery power to a component unless told to do so in a test procedure.
^ When performing electric welding, disconnect electronic components such as climate control, injection, cruise control, PCM and radio.
^ Avoid getting water on fuel and engine control system components.
IGNITION SYSTEM
^ Never pierce ignition leads or insulator boots to connect timing lights or analyzers. Use proper adapters.
^ When removing a spark plug wire, twist boot one quarter turn and pull on boot only, never the lead itself.
^ To disable ignition system, unplug primary connections only. NEVER disconnect secondary leads to disable ignition system.
^ In case of poor performance (such as misfiring), avoid driving and correct problems as soon as possible.
^ Do not disconnect spark plug wires with engine running.
FUEL SYSTEM
^ Avoid getting water on fuel and engine control system components.
^ Fuel and engine control system wiring should be at least 4 inches away from high tension cables.
^ Do not operate fuel pump without fuel in lines and tank.
^ On fuel injected models, do not depress accelerator pedal while starting car.
^ Handle all fuel injection parts with care. Some components are easily damaged.
^ Always use new gaskets or O-rings when installing fuel lines or injectors.
^ Lightly lubricate O-rings and flare connections with gasoline. Do not use engine oil, gear lubricant or brake fluid.
^ After servicing fuel system, check for leaks and correct as needed.
ENGINE AND EXHAUST
^ Use only "UNLEADED FUEL".
^ Avoid running out of fuel.
^ In case of poor performance (such as misfiring), avoid driving and correct problems as soon as possible.
^ Avoid push starting.
^ If running on a dynamometer, make sure catalytic converter is well ventilated.
^ To prevent burns, use caution when working near catalytic converters.
^ To avoid sensor damage, do not use silicone based products on an oxygen sensor equipped vehicle.
^ When performing a compression test, remove fuel pump relay.