1. Anti-self-inductance
When overhaul vehicles, once connected to the ignition switch, regardless of whether the engine in operation, any wires must not be arbitrarily disconnected. Because in a moment disconnecting the wires, the self-inductance of the coil will have a high transient voltage, it is easy to damage computers and sensors. In particular, the following wire can not be scraping off or do the fire test: a conductor of the battery, any wire of ignition devices, and the wire connected to the computer and a mixture of electromagnetic valve control, idle control devices, electronic fuel injection, secondary air jet electromagnetic valve, PROM computer chips, blower and wire connector, such as air conditioners clutch wire. Make full use of high-impedance digital test form during testing, except for special circumstances, do not use pointer ohmmeter test computers and sensors, nor using testing lights to test any electrical installations connected to computers, so as not to damage computers and sensors.

2. Anti-static
When maintenance staff get in or out of the compartment, the body will produce high-pressure electrostatic, so damage computer or digital instrumentation circuit. Therefore, the maintenance staff in the computer's digital instrumentation for maintenance operations at or near these instruments when installed or removed PR0M chips they should take grounding metal band.
Method: one end of the metal band in the wrist, the other end can be caught in the car body.

 3. Anti-magnetic field
Do not place an object with strong magnetic field near the computer, otherwise it will damage its components or circuits, such as speakers, record, the heater ,etc ; it should be as far as possible from the computers.

4. Anti-high-temperature
When use electric arc welding, computer power supply should be first cut off. When do the welding operation near computers and sensors, should pay attention to insulation, the best is to remove the computer or sensors. When use electric welding iron, the power should be less than 45 W, iron, and each contact time less than 10 seconds, so as to avoid overheating to damage computer components.

5. Anti-humidity
When computer exposed to moisture, its circuits and components are easily damaged. Therefore, should be particularly careful to washing vehicles to avoid water into the computer. If there is water leakage at the computer installation place, overhaul as soon as possible.

6. Anti-vibration
Severe shock can easily damage electronic components. Therefore, in the installation, demolition of the computer, do not to pry hit hard, collision the computer, and the body connection must be reliable and not loose. Do not place the removed PROM chip anywhere, as it should be properly safeguarded.