Exhaust Gas Recirculation System Check

(1) Disconnect the vacuum hose (green stripe) from the EGR valve and connect a hand vacuum pump through the three-way terminal.
(2) Regarding cold condition [coolant temperature: 20°C (68°F) or less] and warm condition [coolant temperature: 70°C (158°F) or more] of the engine, check the following two points:

















(3) Disconnect the three-way terminal and connect the hand vacuum pump to the EGR valve.
(4) When a negative pressure of 31 kPa (9.1 in.Hg.) is applied during idling, check that the engine stops or idles unstably.