HAVAL 4S20 - Section IX. Typical Data Received from the Delphi Electronic Fuel Injection System

2. Settings when initializing systems
idle
(5) Absolute air pressure sensor at atmospheric pressure
Less than 5 s
Does not burn
in the reliability of fastening.
Check objects
(2) Battery voltage (3)
Coolant temperature sensor Normal temperature
engine
Check objects
(d) Step 4: Idling test (to do this, after starting the engine, it must be warmed up to normal
(1) Check Engine Fault (2) Whether a fault
code is output (3) Coolant temperature
(b) Check that the fuel lines and vacuum tube are secure;
0-99.6%
(a) Initialization of the electronic fuel injection control system: turn on the ignition, turn it off after 3 seconds, and
complete the initialization of the system after 10 seconds;
intake manifold
Check objects
(2) Check if power is supplied to the control box
(c) Step 3: Start the engine, do not turn on any devices or touch the
Less than 1600 rpm
Low idle
1. Regular check
3. Checking the status of systems and vehicle status
11.5-13V
(d) Check the exhaust system for leaks (test pressure 1.3 atm).
(4) Intake air temperature sensor Outside air temperature
(1) Actual throttle position Stop if within 8 s is in the range of 3-8%
(1) Start time (2) RPM
during start at room temperature
Does not burn
80-94°C
(c) Tighten the oxygen sensor to 3-way catalytic converter bolt, make sure
Fault Code (1)
Engine Malfunction Indicator Light On
(b) Step 2: turn off the ignition;
accelerator pedal;
Check objects
(a) Check for loose connections in the wiring harness connector
(a) Stage 1: wait for the engine to cool down, turn on the ignition and leave the engine in this state for about 30
seconds;
(6) Throttle position sensor operating range
(3) Engine Malfunction Indicator Lamp Off
low coolant temperature);
(b) Fuel system initialization: turn on the ignition, turn it off after 3s, repeat this cycle after 1s, the total number of
repetitions to complete the system initialization is 5 times.
Does not burn
According to the diagnostic scanner, not served
(3) Engine Malfunction Indicator Lamp Off
4C20 Gasoline Engine Repair Manual
Section IX. Typical data received from the Delphi electronic fuel injection system
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