Chery A11. Manual — part 188

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

8. System Maintenance Safety Precautions

1). Diagnostic maintenance safety precautions for EFI system
(1). Controller dismounting requirement
Controller shall be dismounted before electric welding or stoving varnish;
When dismounting controller, ignition switch shall be pulled to OFF so as to avoid damage;
Do not pull out power line from accumulator when engine is in operation or electric system is
in use;
Do not use heavy current of charger to start engine;
Caution: the ambient temperature of controller shall not exceed 80°

(2). Cleaning requirement: The following regulations shall be observed in a serious manner
before operating on fuel supply system and fuel injection system:
Dismounted parts shall be placed at clean site and well-covered with appropriate cloth
without fiber falling;
(3). Various wire harnesses and wire harness of scanner shall be unplugged and plugged after
ignition switch is OFF;
When measuring voltage or grounding on electronic control system, correct connection shall
be ensured;
Diagnostic and self-learning information stored may be lost due to power line pulled down or
controller connector of wire harness unplugged from accumulator.
(4). Precautions on fuel supply system maintenance
When disassembling and assembling fuel pump on the fuel tank filled or partly filled with
fuel, pay attention to the following:
Before operation, device well enough to absorb leaking gasoline shall be installed
neighboring fuel tank opening.
Avoid direct contact of skin with gasoline.
Before loosening a connection, make sure to clean thoroughly the part and its surroundings;
In order to avoid fuel splash of loosen part, duster cloth shall be laid on the surroundings of
the connection;
If maintenance is not carried out immediately on unclosed part, the said part shall be covered
or sealed carefully;
Fittings shall be taken out from package prior to assembling, no fittings without package are
allowed to be used;
When installing injector, make sure not to damage O- ring; in order to facilitate assembling,
apply small quantity of lubrication oil on the said ring;
Do not use compressed air and do not move vehicle as far as possible after system is opened.
2) Safety measures
In order to avoid personnel injury as well as fuel injection and ignition device damage, pay
attention to the following:
(1). If engine is in operation or at starting rotating speed, do not touch or unplug ignition wire
harness;
If engine is to be droven by starting motor instead of starting itself, for example on occasion
of compression pressure examination, wire harness plugs shall be pulled out from Hall sensor
and crankshaft position sensor.

60

CIRCUIT

FOREWORD

New style wiring harness is designed upon

chery sedan wiring harness-updating plan

approved by Chery Auto Co., LTD in July 2001. According to updated plan, concentrated control
in central electrical box is replaced with a nearby control method in design, enhancing circuit
performance, avoiding internal resistance and heat sources interference between electrical
devices and increasing the whole vehicle wiring harness reliability and endurance.

During updating, some structures and features on home and abroad famous brand name

vehicles are used for reference or equivalently taken as follows:

1. Adding whole vehicle electrical devices problem automatic safety-protect unit, which

ensure whole circuit system being cut off when sudden accident occurs to avoid possible fire
hazard or other injury from short problem.

2. Selecting a new central electrical box mainly used for whole vehicle control circuit, in

which there are 6 built-in mini relays, 24 type fuses, 3 intensive safety protect units and 58
external connecting points.

3. High current and power electrical devices are nearby controlled, such as fan and A/C

control circuit are directly completed at front compartment harness, shortening the current path.

Comparing with old wiring harness, main changes in wiring harness and electrical devices

are as follows:

Interior harness, front compartment harness, I/P (instrument panel) harness, battery positive

harness, central electrical box, two front and rear fog light switches instead of one switch on old
vehicle, and also relevant changes in ABS harness connector.

But control theory and whole vehicle harness routing mainly keep unchanged.

Only whole vehicle electrical devices theory illustrations are available in this manual and

there exists difference with actual electrical devices circuit. For convenience of compiling and
printing, some big circuits page are divided into several small pages, which will take
inconveniences when reading and therefore will require the user have a good command of
circuits on SQR710 sedan.

For compilers’ knowledge and time limits as well as rapid technology updating, some

errors and oversights are hard to avoid and kindly appreciate for users’ pointing out with the idea
of improving together. Electrical system are rapidly updated, therefore some new circuit are not
compiled on this manual on the time of publishing and will be supplemented timely.

This manual is compiled by Chang Yongjiu, Yao Shen and reference books are supplied by

product department.

Written by compilers

November 2002

CIRCUIT

TOTAL CONTENT

No.1 Central Electrical Box Fuse And Relay Position (2 Pages)

No.2 Central Electrical Box Connector Position And Function (3 Pages)

No.3 Circuit Manual Explanation (2 Pages)

No.4 Circuit (23 Pages)

No.5 ET Vehicle Circuit (25 Pages)

No.1 CIRCUIT Central Electrical Box Position (In Cabin, Under Steering Wheel)

A/C Clutch

Sunroof Cab License Plate Lamp

Ceiling Light Luggage
Compartment Light Sound

Headlight
Switch

Rear Window
Heater

Gauge

Wiper

A/C

Horn

Fog light

Brake Light Thermo Switch

Glass Lifter
Central Locking

Cigar Lighter

Emergency
Warning Indicator

Gauge

Anti-Theft Unit

Power Mirror

Back Light
Mileage Sensor

ABS Fuse

ABS Fuse

W

iper Relay

Emer

gency

W

arning Relay

Central Electrical Box Position

(

In Cabin

, Under S

teerin

g

Wheel

)

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