Maintenance Manual for Chery·Windcloud Marelli EFI System
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.
No Repair/ replace
injector or fuel pipe
Yes Repair or replace fuel
inlet pipe
14 Check if leakage or clogging occurs in fuel inlet
pipe
No Replace fuel pump
Yes Repair or replace fuel
return pipe
15 Check if fuel return pipe is blocked up or bent.
No Replace pressure
regulator
Yes Go to next step 16 Check if data of intake manifold absolute
pressure and intake air temperature sensor is
normal.
No Replace sensor
Yes Go to next step 17
Check if spark plug, high voltage line and
ignition coil are in good condition.
No Replace or adjust
Yes Ch e c k a i r
conditioning system
18 Check if caused by air conditioning system.
No Replace ECU
15). Air conditioning system failure
Yes Go to next step 1 Check if there is enough refrigerant in system,
and if air conditioning belt, air conditioning
clutch and pressure switch are working in good
condition.
No Troubleshooting
Yes Eliminate failure
displayed
2 Make engine run at idle speed, and switch on air
conditioning switch. Check with scanner to see
if failure of air-conditioning thermal resistor
occurs.
No Go to next step
Yes Go to next step 3 Turn on air conditioning switch, connect
commutator between ECU and wire harness,
and then measure to see if there is signal input
on air conditioning switch, air conditioning
pressure of ECU.
No Check wire harness
Yes Replace bulb or
repair wire harness
4 In case low-level control is adopted, check if
air-conditionor still works when it is OFF.
No Go to next step
Yes Re p a i r ai r
conditioning relay
and wire harness
5 Check if there is low-level output at ground
terminal of pull-up coil of ECU air conditioning
relay.
No Replace ECU
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