- 1. The engine starts with difficulty or does not start.
- 2. The engine runs erratically at idle.
- 3. Driving performance of the car is deteriorating.
If one of the above malfunctions is present, first perform routine diagnostics, including a check of the main engine systems (malfunction of the ignition system, incorrect engine adjustment, etc.). After that, check the elements of the engine management system with multipoint injection using the HI-SCAN device.
Note. - Before removing or installing any of the elements of the system, read the fault codes, then disconnect the negative wire «–» battery.
Note. – Before disconnecting the negative battery cable, switch off the ignition. Disconnecting or connecting the battery cable while the engine is running or the ignition is on can cause damage to the engine control unit.
Note. – The heated oxygen sensor is connected to the computer with shielded wires, the shields of which are connected to «weight» body to protect against interference from the ignition system and radio interference. If the screens are damaged, replace the wires.
Note. – When checking the generator load, do not disconnect the wire from the positive terminal «+» battery to prevent overvoltage damage to the ECU.
Note. – When charging the battery from an external source, disconnect the negative cable from the battery so as not to damage the computer.