microcomputer or sensor get damage , except any instruction. Usually should use high impedance digital tester.
(9) When people enter carriage, body’s static discharge may produce very high voltage , so when operate digital
tester for repairing or close to this type meter, should take metal tape , one head coil on wrist ,the other one clip on
the car body.
（
10
）
Don’t’ take down any electric ejection system parts or plug-in from its installing position, for avoiding any
damage or water,oil dirty into the plug-in , influence the electric ejection system ‘s normal work.
（
11
）
When cut off or turn on the plug-in , must switch off the ignition , otherwise will damage electric parts.
（
12
）
When doing fault hot condition simulated and other repairing work make heat up, don’t let the electric
control unit over 80
o
C
（
13
）
Electric ejection system’s fuel supplying pressure is high( around 300kPa), all the fuel pipes use bear-high
pressure fuel pipe. Even engine not running, oilchannel keeps a high fuel pressure. So, don’t take down fuel pipe
easily, do pressure relief to fuel system before take down fuel pipe when needs repair the fuel system, pressure
relief method: take down fuel pump relay, start engine let it running on idle speed, until extinguish itself. Fuel pipe
taking-down and fuel filter changing should be done by pro mechanics in a well ventilated place.
（
14
）
When take electromotion fuel pump from fuel tank, don’t electrify it, for avoiding produce spark ,cause
fire.
（
15
）
Do the running test under dry state or in the water for the fuel pump is not permitted , otherwise will reduce
its useful time, it must be doing in water. And to the fuel pump, the polarity should not be reversed.
（
16
）
When check the ignition system , only do the jump spark test when necessary, and control the time as short
as possible. Don’t open air damper or take down fuel ejector plug , it will induce a great lot unburned fuel enter
into exhaust pipe , damage the three unique catalyst.
（
17
）
Idle speed system with self-adjust function, so the adjust of idle speed is auto finished by electric eject
system, no need manual adjust. The set screw of air damper already be adjusted well when it was produced, user
change its initial position freely is not allowed.
（
18
）
Don’t connect anode and cathode wrongly when connecting storage cell , for avoiding damage electric
circuit , this system use cathode bonding.
（
19
）
Don’t take down storage cell cable or plug in, out electric joint, otherwise easy damage ECU and circuit.
（
20
）
Before electric welding , should take down storage cell anode, cathode, cable, and electric control unit .
（
21
）
Don’t use the way cut through the wire skin for check the parts in-out electric signals.
If driver already see the engine fault indicating lamp is shinning, he should check step by step according to
engine microcomputer control system fault finding program. There are usually four steps for finding faults: client
idea, eyeballing check, self diagnose test, examine and repair.
Section
Ⅷ
electric eject system fault diagnose and repair
summary
Computer is the corn of electric eject engine control system, its installed inside the computer box, computer
input and output is through one connector with 55 channels.
Computer is made up of central process unit, random memory, erasable programmable read only memory
(EPROM) and input output interface circuit.
Control program and parameters of read only memory is a important guarantee for the computer can control
target accord to the set. It can edit ,supply or rebuild control program and parameters by through a diagnose faucet
connecting with a special diagnose tool (ELIT). Its computer input, output relation like the picture following:
Cause of fault and most possible occur parts
Electronic ejection system fault means : when computer its function or get information not correct, arouse
relevant control order not correct , result in engine can’t start, start difficult, no high speed, fuel consumption
increase, idle speed not steady and so son.
