Chery A11 2003 Repair Manual page 293

Maintenance Manual for Chery·Windcloud
5). Vehicle cold starting is difficult
Step Operation
1 Set ignition switch in "ON". Check with scanner
to see if there is failure information record.
2 Check with multimeter to see if coolant
temperature sensor is in good order. (Or connect
in series a 2.5K ohmic resistance between pins of
54# and 62# of ECU to replace coolant
temperature sensor and then start engine.) If
starting is OK, it shows coolant temperature
sensor is out of order.
3 Switch on the ignition switch and connect
commutator between ECU and wire harness.
Check if the voltages of the following pins of
ECU are in good order: if the accumulator voltage
is about 12V on 47#, while 0 on 27# and 28#.
4 Check if air filter is smooth; if throttle has carbon
deposit.
5 After successful starting, check to see if intake
manifold pressure is between 35-55kPa during
idling.
6 Slightly step down on throttle to see if the starting
is easy.
7 Pull out the idle speed actuator connector on wire
harness before engine coolant temperature reaches
35℃ to see if engine speed declines.
8 Connect fuel pressure gauge valve. Ground
directly the 86# pin of fuel pump relay. Switch on
the ignition switch to make fuel pump relay and
fuel pump work, and then check if fuel pressure is
at about 350kPa.
9 Provide 12V voltage directly from accumulator to
injector with special connector, and check if
injector is working in good order.
10 Recheck injector to see if it is working in good
order after cleaning.
11 Check if fuel is deteriorated or contains water.
Marelli EFI System
Result Solution
Yes Eliminate
displayed
No Go to next step
Yes Go to next step
No Replace sensor
Yes Go to next step
No Check wire harness
and
connector
Yes Go to next step
No Replace
Yes Go to next step
No Eliminate
system air leakage
failure
Yes Check throttle and
idle speed passage
No Go to next step
Yes Go to next step
No Repair or replace
idle speed actuator
Yes Go to next step
No Go to step 12
Yes Go to step 11
No Go to next step
Yes Go to next step
No Replace injector
Yes Replace fuel
No Go to step 17
failure
socket
intake
42