Stop the engine and connect the tachometer.
Pic. 14.24. Scheme of the engine warm-up system of the RVT system: 1 - air conditioner switch; 2, 4, 5 - electromagnetic valves; 3 – the electromagnetic valve of the amplifier of a steering; 6 – fan switch; 7 - control unit; 8 - headlights; 9 - radiator fan motor; 10 – fan motor; 11 - ignition switch
Disconnect connectors from radiator fan motor and A/C magnetic clutch (pic. 14.24).
Pic. 14.25. The location of the contacts of the engine warm-up valve connector
Apply voltage from the battery to the contact «GB» engine warm-up valve and start the engine (pic. 14.25). If all consumers of electricity are turned off, the engine speed should be 1200–1300 min-1. Otherwise, adjust the valve by turning the adjusting screw.
Stop the engine, connect the connectors and remove the tachometer.