Note. Special tools are needed for systematic troubleshooting and troubleshooting. Such devices are very expensive and, as a rule, are available only at service stations. Therefore, only general checks are described below.
1. Check the condition of the battery (see chapters Ongoing care and maintenance and Engine Electrical Systems).
2. Check the condition of all fuses (see chapter Onboard electrical equipment).
3. Disconnect and reconnect all connectors of the respective electronic systems. Check up reliability of fixing of sockets and cables in an impellent compartment.
4. Check up reliability of fastening of all connections of weight.
5. Check the tightness of the hoses and lines, paying special attention to the detection of cracks. Replace defective components, tighten loose fitting connectors.