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(c) Rectangular pulse train and corresponding signal: oscilloscope;
(4) Evaporative Emission System Adsorber
(e) Diagnosis of malfunctions of control systems and determination of engine operating parameters: a diagnostic
scanner for determining malfunctions of electrical systems in a car and related software from Delphi.
(d) Fuel pressure: fuel pressure gauge (fuel pressure in the high pressure fuel line can be detected using the
diagnostic software using the fuel pressure sensor signal, and pressure in the low pressure fuel line can be
detected using a fuel pressure gauge with corresponding measuring range);
2. Pilot lamps
With the help of the canister purge solenoid valve, the engine control unit regulates the volume of fuel
vapors entering the engine combustion chambers from the canister. The operation of the valve does not affect
the operation of the engine in normal mode during the shutdown of the adsorber. The efficiency of capturing
vapors of fuel coming from the fuel tank is affected by the active volume of the adsorber. If the canister volume
is too small, it can lead to overfilling when the engine is idling or in another mode, releasing a large amount of
fuel vapors.
(a) If a malfunction of a system or component is detected while the engine is running, the warning lamp will illuminate
immediately to inform the driver of the need for urgent inspection and/or repair;
Here is a schematic diagram of the diagnostic scanner. Principle of operation and names
1. Standard tools and equipment
(b) After the fault has been corrected, the corresponding code must be cleared using a diagnostic scanner in order
to avoid its influence on the fault diagnosis during the next repair.
functions of diagnostic scanners from different manufacturers may vary.
3. Diagnostic scanner
(a) Removal and installation of components of control systems: standard tool for removing and installing components
(a) The main functions of the diagnostic scanner are reading the system operation data stream and system
information, providing temporary forced control, identifying system components, and reading and clearing trouble
codes. It's the ultimate car troubleshooting tool.
car nets.
(b) Electronic control circuits and electrical signal testing: digital multimeter with buzzer;
and determining the state of systems.
171
Chapter XII. Engine management system
Section VII. Repair Tools
Machine Translated by Google
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