Chery Tiggo T11 LHD. Manual — part 51

Chery T11 Service Manual Electric Injection System

17

Measures on troubles: Once one ignition coil

failure is detected, close the fuel injector of the

corresponding cylinder.

CAUTION: The over-high temperature of

ignition coil may cause the bad operation of

engine ignition system.

Resistance of ignition coil primary winding:

0.55 to 0.45 KΩ

Resistance

of

ignition

coil

secondary

winding: 5.6 to 4.8 KΩ

High-voltage side:

These pins No 1, 2, 3 and 4 connect to the

ignition plugs of No 1, 2, 3 and 4 engine

cylinders respectively via the distribution wire.

Troubleshooting:

1) Short or open circuit inside coil;

2) Electricity leakage of coil, and crack of

casing;

3) The coil aging causes the shortage of

ignition electricity quantity.

11. Steel Fuel Distributing Pipe Assy.

Application: It is used to store and distribute

the fuel supplied from the fuel pump, provide a

more stable pressure environment for the fuel

injection system to balance the fuel supply

pressure and quantity of all cylinders and enable

the engine to operate smoothly.

Structure: The fuel distributing pipe assy.

consists of a fuel distributing pipe and a fuel

injector.

Installation

Requirement:

The

quick

connection of fuel outlet/inlet hose and fuel

supply pipe must connect reliably. The vehicle

shall take a trail run in situ after the repair of

fuel system so as to ensure there is no fuel

leakage in the fuel system. And, only this, the

vehicle can be delivered.

Trouble Diagnosis: In normal condition, the

probability of the fuel supply main pipe failure

is very small. The failures are caused mostly due

to the impropriate assembly that enables the fuel

system to leak. Thus, you shall pay more

attention to the following highlights during

assembly: the used O oil-seal shall not be

applied again; and some lubricating oils may be

applied properly during assembly.

Fuel distributing pipe assy.

Chery T11 Service Manual Electric Injection System

18

CAUTION:

The pressure must be released firstly before

the fuel system is repaired, and it must be

ensured that there is no pressure oil in the

fuel pipeline. Pull out the connection of fuel

pump, and then put on the brake till the

vehicle stops. In this case, there is already no

pressure oil in this system. After repair, the

fuel shall be pumped to the system firstly

when the vehicle starts initially, the method

of which is: to turn on the ignition switch,

and turn off it after the completion of

self-checking. Repeat this procedure 3 to 4

times.

12. Crankshaft Position Sensor (Speed Sensor) (CKPS)

Application: The crankshaft position sensor is

used to provide the ECU with the engine’s

speed, turning angle, top dead center signals

which are applied in the engine ignition, fuel

injection and timing system.

Structure and Principle: The MT 20U

electronic fuel injection system employs the

magnetic induction coil type speed sensor,

applies the rotation to cut the magnetic force

lines and generate the alternating current and

voltage signals. The ECU receives the

alternating signals, shapes these signals, and

then changes them into the digital signals that

can be identified by the ECU and applied in the

system control of engine. The flywheel ring

gear is installed together with the signal wheel.

The latter adapts the 58X gear form, and

provides the ECU with speed, turning angle,

top dead center. There is the No 1 cylinder’s

top dead center in the continuous gap.

Profile of a crankshaft position sensor

Chery T11 Service Manual Electric Injection System

19

Trouble Diagnosis:

The ECU will real-time monitor the sensors and

wires:

1) The sensors has no signal output;

2) The sensor’s output signal is distorted;

3) The sensor signal wire is short circuit;

4) The sensor signal wire is open circuit.

Troubleshooting:

1) Examine the wires of sensor, and the earth

or short circuit of wire;

2) Apply the three-way instrument to connect

the joints between the sensor and harness

and examine the connection of power

supply, earth wire and signal wire.

Operating temperature: -40 to 150℃

Clearance between the sensor and ring gear:

0.3 to 1.5 mm

Resistance of sensor: 504to 616Ω

T11 Crankshaft Position Sensor

Circuit diagram of crankshaft position sensor

Pin:

1) No 1 (A) for sensor signal wire high level

(to ECU 12#);

2) No 2 (B) for sensor signal wire low level

(to ECU 28#);

3) No 3 (C) for sensor earth (to ECU 73#).

13. Canister Control Solenoid Valve (EVAP)

Application: It is used to control the rinse air

flow from the canister to the intake main pipe.

The adsorptive capacity of the canister is

limited. If the evaporated gasoline adhesive to

the canister aren’t used out, the gasoline will

volatilize to the outside and pollute the air as

well as increase the insecure factors.

Profile of a canister control solenoid valve

Chery T11 Service Manual Electric Injection System

20

Structure and Principle: There is a solenoid

valve organization inside the canister control

solenoid valve. The digitalized control pulse

square wave from the engine will control the

opening of the solenoid valve. Based on the

different operation conditions of the engine, the

openings of the canister control solenoid valves

are different. When the engine is operating with

large load and idle, the canister control valve

doesn’t put into operation in order to ensure the

output power of engine.

Trouble Diagnosis:

1) The sensor-earth wires are short circuit;

2) The sensor-supply wires are short circuit;

3) The sensor wires are open circuit.

Troubleshooting:

1) Examine the short or open circuit of sensor

wires;

2) Examine

the

wire

jumping

among

harnesses;

3) Examine the short circuit between the

sensor and power supply;

4) Examine the jamming inside the canister

control solenoid valve and its ventilation.

Operating temperature: -40 to 120℃

Resistance of coil: 19 to 22Ω

Operating voltage: 8 to 16 V

Rated operating voltage: +12V

T11 Canister Control Solenoid Valve

Circuit diagram of canister control solenoid

valve

Pin:

1) No 1 (A) for the solenoid valve control (to

ECU 63#);

2) No 2 (B) for the power supply of main

relay.

Main Relay