To check the idle speed and the CO content in the exhaust gases, it is necessary to use an accurate tachometer and an exhaust gas analyzer. If the measured values do not correspond to the required values, the adjustment must be made at a service station using special diagnostic equipment. Since neither the idle speed nor the CO content is manually adjusted.
The diagnostic connector for connecting special equipment is located in the wiring harness of the engine management system. The use of special equipment allows you to easily and quickly determine a malfunction in the engine control system. Checking the engine control system without special equipment by elimination takes a lot of time and does not always give positive results. In this case, there is a possibility of damage to the electronic control unit ECU.