Chery A15. Manual — part 276

- Open circuit of crank shaft position sensor
wire harness
- Crank shaft position sensor terminals are
reversely connected.
- Incorrect clearance between sensor and 58x
target gear
- Sensor absorbs foreign matters
- Sensor magnetism fades or is spoiled
2) There is turning speed data flow
- Incorrect relative position between the 58x
gear and the upper limit

- Repair wire harness

- Repair wire harness

- Adjust the clearance: 0.3-1.5mm

- Clean the sensor
- Replace the sensor
2) There is turning speed data flow
- Check: Lower rim of Tooth No. 20 is
the upper limit of Cylinder 1-4.

Fuel supply system:
1) Reversed connection of inlet/return fuel
pipe
2) Open circuit of fuel pump wiring

3) Extra fuel in the engine





4) Inlet pipe pressure > 250kPa
- Blocked spray nozzle
5) Inlet pipe pressure < 250kPa
- Insufficient fuel in the fuel tank
- Clogged fuel filter
- Inlet pipe leakage
- Damaged fuel pressure regulator
- Insufficient fuel pump pressure
- Improper fuel evaporative duty

1) Connect properly

2) Repair vehicle wire harness and fix the
fuel pump fittings again
3) Small amount of extra fuel in the
engine: wide open the throttle and start
the starter;
Big amount of extra fuel in the engine:
unfix the spark plug and start the starter
until the extra fuel is fully dried.
4)
- Replace spray nozzle
5)
- Gas up
- Replace the fuel filter
- Replace the inlet pipe
- Replace the fuel pressure regulator
- Replace the fuel pump
- Use fuel of appropriate evaporative
duty based on the season

Ignition system
1) Ignition coil fittings
2) Incorrect cylinder sequence

3) Damaged spark plug
4) Damaged ignition coil

1) Fix the terminals again
2) Connect the coil and spark plug as
instructed
3) Replace the spark plug
4) Replace the ignition coil

Continued

Idle speed control system:
1) Lightly step on the accelerator pedal but

1) Look for other causes

startup fails.
2) Lightly step on the accelerator pedal and the
car starts

2)

- Idle speed valve terminal is detached
- Idle speed valve terminals do not match with
ECM terminals
- Blocked idle speed valve
- ECM normal power supply is cut off
- Idle speed valve is damaged
- ECM fault

- Fix the terminals again
- Repair wire harness

- Clean the throttle body
- Repair wire harness
- Replace idle speed valve
- Replace ECM

Intake/exhaust system
1) Clogged air filter

2) Clogged three-way catalyst
- Broken catalyst
- Clogged with foreign matters

1) Clean the air passage and replace the
filter element
2)
- Replace the three-way catalyst
- Repair the engine and replace the three-
way catalyst

Fault 03

Engine is ignited but fails to start

Possible cause

Reference maintenance scheme

Fuel supply system:
1) Inlet pipe pressure < 250kPa
- Insufficient fuel in the fuel tank
- Clogged fuel filter
- Inlet pipe leakage
- Damaged fuel pressure regulator
- Insufficient fuel pump pressure
- Improper fuel evaporative duty

1)
- Gas up
- Replace fuel filter
- Replace inlet pipe
- Replace fuel pressure regulator
- Replace fuel pump
- Use fuel of appropriate evaporative
duty based on the season

Idle speed control system:
1) Step on the accelerator pedal and the engine
starts
- Idle speed valve terminal is detached
- Idle speed valve terminals do not match with
ECM terminals
- Blocked idle speed valve
- ECM normal power supply is cut off
- Idle speed valve is damaged
- ECM fault

1)

- Fix the terminals again
- Repair wire harness

- Clean the throttle body
- Repair wire harness
- Replace idle speed valve
- Replace ECM

Continued

Intake/exhaust system:
1) Clogged air filter

1) Clean the air passage and replace the

2) Clogged three-way catalyst
- Broken catalyst
- Clogged with foreign matters

filter element
2)
- Replace the three-way catalyst
- Repair the engine and replace the three-
way catalyst

Fault 04

Abnormal idle speed

Possible cause

Reference maintenance scheme

1) System is powered up for the first time after
power supply to the vehicle is cut off
2) ECM normal power supply is cut off at
parking

1) Turn off the ignition switch and restart
10 seconds later
2) Resume normal power supply to the
ECM

Fault 05

Low idle speed

Possible cause

Reference maintenance scheme

1) Idle speed valve terminal is detached
2) Idle speed valve terminals do not match
with ECM terminals
3) Blocked idle speed valve
4) Idle speed valve is damaged
5) Insufficient fuel in the fuel tank
6) Clogged fuel filter
7) Inlet pipe leakage
8) Clogged three-way catalyst

9) Blocked air intake system

10) Damaged fuel pressure regulator
11) Insufficient fuel pump pressure
12) ECM fault

1) Fix again
2) Repair wire harness

3) Clean the throttle body
4) Replace the idle speed valve
5) Gas up
6) Replace fuel filter
7) Replace inlet pipe
8) Replace the catalyst and repair the
engine if necessary.
9) Clean the air passage and replace the
filter element
10) Replace the fuel pressure regulator
11) Replace the fuel pump
12) Replace the ECM

Fault 06

High idle speed

Possible cause

Reference maintenance scheme

1) Comply with target idle speed
- Abnormal reading on water temperature
sensor
- Normal reading on water temperature sensor
2) Do not comply with target idle speed
- Throttle position does not reset
- Idle speed valve step distance < 50 steps –
inlet pipe leakage; idle speed control system
fault
- 5 steps < Idle speed valve step distance < 150
steps - Idle speed control system fault

1)
- Replace the water temperature sensor

- Normal
2)
- Adjust the throttle pull rod
- Repair inlet pipe leakage; see “Low idle
speed” for idle speed control system fault

- see “Low idle speed” for idle speed
control system fault

Fault 07

Unstable idle speed

Possible cause

Reference maintenance scheme

1) Terminals of the spark plug wiring are not
properly connected
2) Different spark plug clearances
3) Detached or damaged vacuum pipe of fuel
pressure regulator
4) Some spray nozzles are clogged

5) Displaced 58x gear ring

1) Connect again

2) Adjust to 1.0-1.2mm
3) Repair or replace the vacuum pipes

4) Clean or replace the defected spray
nozzle
5) Make sure that the lower rim of Tooth
No. 20 is the upper limit of Cylinder 1-4.

Fault 08

Sudden flameout when the engine is in normal operation

Possible cause

Reference maintenance scheme

1) Terminals of the electrical system are not
properly connected.

2) Insufficient fuel in the fuel tank
3) Inlet pipe leakage

1) Check all relevant fittings in the
circuits to the power source
anode/cathode
2) Gas up
3) Replace the inlet pipe

Fault 09

Engine decelerates and flames out

Possible cause

Reference maintenance scheme

1) ECM normal power supply is cut off at
parking
2) Idle speed valve terminals do not match
with ECM terminals
3) Blocked idle speed valve
4) Idle speed valve is damaged
5) ECM fault

1) Resume ECM normal power supply

2) Repair wire harness

3) Clean the throttle body
4) Replace the idle speed valve
5) Replace the ECM

Fault 10

Poor/delayed acceleration

Possible cause

Reference maintenance scheme