2.7.2. Check of a technical condition (Check of frequency of rotation of the crankshaft of the engine idling)
Before check of idling check serviceability of spark plugs, nozzles, an idling regulator, a compression in engine cylinders.
– The temperature of cooling liquid should be within 80–85 °C;
– Lighting, the electrofan of system of cooling of the engine and all auxiliaries should be switched off;
– establish the gear shifting lever in neutral situation (on cars with an automatic transmission establish the selector lever in the situation "R" or "N");
– establish a steering wheel in the situation corresponding to rectilinear movement (only for cars with the amplifier of a steering).
Attach a control tachometer to primary winding of the coil of ignition (follow indications of the maintenance instruction of a tachometer) or attach the HI-SCAN device to electric to the data line socket.
Start the engine and let's to it work idling.
Increase frequency of rotation of a cranked shaft to 2000–3000 mines-1 for the period of more than 5 with, then let's work to the engine idling within 2 minutes.
Check on a tachometer frequency of rotation of a cranked shaft idling
Frequency of rotation of a cranked shaft idling should correspond to the values given in table 2.16 «Data for check».