generator;
• In the absence of the above faults, check the throttle body and make sure
• Too small throttle angle may be the result of depressurization of the air supply system; Throttle angle too high
may be due to throttle sticking.
• Pressure in the intake manifold can be used to determine if there is a leak in the air supply system or if the valve
clearances are not correct. Too high pressure can indicate too small valve clearances, which can affect engine
power and cause the exhaust valves to open too early, increase the temperature of the exhaust gases and,
therefore, shorten the life of the 3-way catalytic converter and oxygen sensors. In addition, an increase in
pressure can also be caused by a blockage in the exhaust system (for example, if there are foreign objects in
the exhaust pipe or in the cells of the catalytic converter);
that she is correct.
(5) Checking the air conditioning system
• When the air conditioner is turned on, the set idle speed is increased by 100 rpm, and when the air conditioning
fan is turned on, by another 50 rpm; however, as a rule, the fan is turned on with the system, i.e. the engine
idle speed increases by 150 rpm.
(4) Idling test
• The control lamp lights up, but the malfunction code is not registered
(6) Checks while driving
• Malfunctions of the vehicle speed sensor and oxygen sensors are detected during
• Based on the battery voltage, determine if the generator is in good condition;
• Excessively high voltage may be due to a faulty generator voltage regulator.
movement, after which the emergency control procedures come into effect.
• Excessively low voltage may be due to incorrect connection or malfunction.
185
Chapter XII. Engine management system
Machine Translated by Google
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