Chery SQR 7160 sedan. Manual — part 46

CAC Gasoline Engine Maintenance And Servicing Manual

102

1.injection/ignition ECU2 diagnosis passage 12.λsensor
3.speed/ TDC sensor

13.fuel pressure regulator

4.engine flywheel

14.fuel injector

5.ignition coil with dual high-pressure connector 15.dual relays (for ECU and fuel pump)
7.throttle valve position sensor

16.25A injection/ ignition system fuse

8.idling speed actuator

17.5A ECU fuse

9.water temperature sensor 18. fuel vapor recirculation solenoid
10.absolute pressure sensor

19.λsensor connector

11.intake air temperature sensor

self-diagnosis system：
the information is stored permanently, even when the power is cut off. the following self-diagnosis may

be achieved:

——speed/ TDC sensor
——opened or shorted absolute pressure sensor circuit
——opened or shorted water temperature sensor circuit t
——opened or shorted intake air temperature sensor circuit
——opened or shorted throttle valve position sensor circuit

——faulted (malfunctional) actuator signal

the installation position in
engine

of

single

point

injection/ ignition system

Fig. 161

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CAC Gasoline Engine Maintenance And Servicing Manual

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——engine idling speed actuator doesn’t work

——shorted fuel injector +12V circuit
——opened or shorted ignition coil circuit
also, monitor the following failure：
——with engine cycling start or engine working,
signal wheel is not synchronous.
——opened or shorted λsensor circuit
——opened fuel pump circuit
If a sensor failure(except the speed sensor/ TDC sensor) is
indicated, ECU will substitute the preset value for the input data
from the faulted sensor to keep engine operating. Also ECU
will store the failure in the memory permanently. At the same
time, the sensor will be kept out of the system until the sensor
signal matches the signal from ECU again.
If the actuator or the corresponding signal channel fails,
the above program is also applied.
When a failure is detected and the corresponding substitute
value is applied, the warning light on the instrument panel will
turn on.
Warning light will go out only when the component was
replaced by the dealer or the failure is non long-term .
No matter whether the failure is long-term, the failure data
will be stored permanently in the memory.

communicate with CHECK—UP1 actively

Connecting CHECK—UP1 diagnosis tool to the system
may fulfill the following operations:

——display the short-term or long-term malfunctions or

parameters
—— active diagnosis：
—— fuel injector
—— fuel pump

——

ignition module

—— idling

speed actuator

I.A.W

system warning light

—— fuel

vapor recirculation solenoid

Fig. 162

Fig. 163

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CAC Gasoline Engine Maintenance And Servicing Manual

104

Removal and reinstallation for fuel pump：
Fuel pump is installed inside the fuel tank.
Removal procedure is as following:

—— switch off the power supply
—— remove quick release fuel

Outlet pipe and fuel return pipe
Remove and reinstall filter
—— loosen and remove the filter mounting bolt from the
bracket
—— remove the sealing clip of fuel pipe from the filter
—— during operating, use an appropriate container to
collect the fuel drained

The fuel filter must be replaced every 30,000km.

Note: The filter must not be installed reversely , it must
be replaced even for the reverse installation of short time. The
arrow on the case indicates the direction of fuel flow .
replace oxygen sensor orλsensor:
—— remove the electric connections (1) and (2) from theλ
sensor

—— removeλsensor from the case
——during reassembling, grease should be applied on
threads. antiseize boron nitrogen grease is recommended.

Fig.164

Fig. 165

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CAC Gasoline Engine Maintenance And Servicing Manual

105

tightening torque 0.5—0.6Nm

at ambient temperature, The resistance indicated by
digital multimeter should be 2.5—4.5Ω.

Note: Even though little lead exists in the fuel, the

sensor may fail soon. the function inspection is specified
every 45,000km and 90,000km.

The throttle valve cable adjustment

Adjust the throttle cable according to the following:

—— Loosen two lock nuts(2)，hexagonal lever(3) is retained in the protective sleeve
—— tighten or loosen hexagonal lever (3) to adjust the end position of protective boot (4) insuring the cable

(1) is not too loose or too tight when pedal is released.

—— tighten the two lock nuts (2) in the hexagonal lever (3)

—— depress accelerator pedal fully. Check for throttle valve operation while it is fully open.

sensor

Fig. 166

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