Great Wall GW491QE, Руководство по обслуживанию

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EF.2-10
(e)Engine฀ control-module฀ fail฀ mode :The฀ failure฀ of฀generator฀ voltage-adjustor฀ will฀ burn฀ and฀ damage฀ the฀computer.
When฀ the฀ computer฀ is฀ changed,฀ measure฀ first฀ the฀ supply฀ voltage฀ at฀ idle฀ speed฀ and฀ ensure฀ it’s฀ less฀ than฀ 15฀ volts.
When฀ the฀ engine฀ rotating฀ speed฀ has฀ been฀ increased฀ to฀ a฀ value฀ greater฀ than฀ 2,000 ฀ revolutions,the฀ supply
voltage฀shall฀be฀less฀than฀ 15 ฀volts.
(f)Function฀&principal The฀function฀of฀signal฀collecting฀system฀is฀to฀tell฀ECU฀the฀working฀status฀of฀engine฀and฀whole฀vehicle,฀and
to฀meet฀relevant฀requirements฀on฀dynamic฀&auxiliary฀function฀imposed฀by฀the฀driver.฀Sofar,฀signals฀from฀following฀articles฀has฀been
covered฀in฀system฀configuration:
-฀Engine฀rotating-speed฀sensor฀/crankshaft฀position฀sensor
-฀Oxygen฀sensor
-฀Throttle฀position฀sensor
-฀Pressure฀sensor฀for฀inlet฀manifold
-฀Inlet฀temperature฀sensor
-฀Temperature฀sensor฀for฀engine฀coolant
-฀Vehicle฀speed฀sensor
-฀Air฀conditioner฀/evaporating฀temperature฀sensor
-฀Electrical฀load฀signal
฀฀฀฀฀MT20U฀engine฀control฀module฀(ECU)
(a)Function฀&principal
Engine฀control฀module฀is฀one฀microprocessor฀based฀on฀a฀single-chip
device.฀And฀its฀function฀is฀to฀process฀sensor฀data฀coming฀from฀different
positions฀of฀vehicle,฀to฀determine฀the฀working฀status฀of฀engine,฀and฀to
exactly฀control฀the฀engine฀via฀an฀actuator.
Auxiliary฀ system฀ control฀ function theft-prevention฀system;฀ fan
cooling฀system air฀conditioner฀system,฀etc. Installation It฀shall
be฀installed฀inside฀the฀engine฀chamber;฀and฀better฀not฀have฀steel฀part
overlapping฀on฀exterior฀cover.
(b)Failure฀determination
Important฀ note Either฀ of฀ following฀ determinations฀ may฀ be
concluded฀based฀on฀that฀the฀whole฀vehicle,฀its฀wire-harness,฀and฀other
s y s t e m ฀ p a r t s ฀ & c o m p o n e n t s ฀ a r e ฀ n o r m a l ฀ i n ฀ f u n c t i o n
ECU฀fault System฀is฀unable฀to฀communicate฀with฀the฀outside฀world;
-Theft-prevention฀locked It฀has฀been฀connected฀with฀the฀theft฀detector,฀and฀may฀be฀used฀again฀after฀a฀decoding฀process.
-Failure฀with฀the฀signal฀input฀system Unable฀to฀receive฀the฀signal฀from฀sensor.
-Failure฀with฀the฀generator฀adjustor฀might฀cause฀a฀much฀higher฀output฀voltage,฀and฀damage฀the฀ECU.
-Failure฀with฀the฀output฀control฀system When฀the฀driver฀inside฀ECU฀is฀damaged,฀the฀driving฀&actuating฀mechanism฀will฀not
work฀any฀more.
(c)Characteristics฀of฀product
16-bit฀single-chip฀processor฀with฀high฀performance
10-bit฀module฀converter
Rewritable฀128Kb฀memory
8Kb฀RAM฀memory
working฀temperature฀ (-40 85)
normal฀working฀voltage (9 16)V
abnormal฀working฀voltage (6.3 ฀ 9)V (16 24)V
over-voltage฀protection (-12฀V 24)V
Delphi฀engine฀management฀systm-Determination฀on฀the
principal฀/utility฀/failure฀of฀key฀system฀parts
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