Fault Maintenance Diagnosis Method of EFI System
Diagnosis Directly Using the Flashing Fault Lamp at Instrument
Fault lamp [A] is located on the dashboard and has a
mark below it. Under normal circumstances, open the key,
the fault lamps will be on normally, indicating that the EFI
system is a state with power supply, and it can work; fault
lamp is off, indicating that there is no power supply in EFI
circuit, it will not work, and check should be conducted for
the connection of positive and negative electrodes of fuse
and storage battery. After starting the engine, fault lamp
goes off, indicating that there is no fault; on the contrary,
fault lamp is nor
mally on after starting engine, indicating
that EFI system is abnormal
troubleshooting.
In the case that a fault is confirmed, after opening and
closing the key for 3 times, namely the operation of
opening---closing--- opening---closing –
opening key, the
fault lamp will flash the flash code of corresponding fault.
Then, corresponding fault can be identified through fault
code table.
Of them, when using the method to read fault using
fault lamp, the flash code rule is as follows: for example, the
fault is the open circuit of intake pressure sensor or short
circuit of signal terminal pin to the negative electrode of
storage battery, the fault lamp will flash for 10 times to
represent 0, flash for 1 time to represent 1 after 1.2 seconds,
flash for 10 times to represent 0 after 1.2 seconds, flash for
7 times to represent 7 after 1.2 seconds, namely P0107. It
can be seen that except that number 0 is represented by
flashing for 10 times, numbers 1-9 correspond to the times
of flashing. I
f there are other fault codes, such as fault
P0201, there is fault in the fuel injector of cylinder 1. After
flashing P0107, wait for 3.2 seconds, continue to flash
P0201 fault code; if there is no other fault, it will flash
P0107 and P0201 cyclically. Then, relevant faults can be
queried according to fault code table.
- 176 -
To Next Page
Loading...
Need help?
General
