Geely Emgrand X7. Manual part — 30

12. Spark Plug Wire Damage

13. Ignition Coil Damage

14. Crankshaft Position Sensor

Refer to 2.2.7.35 DTC P0335 P0336

15. Too Much Oil in Combustion

Chamber or Valve Seals
Leakage

16. Cylinder compression pressure

is incorrect

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

1. Valve Catching or Leakage,

Broken Valve Spring, Incorrect
Valve Timing

2. Too much carbon residue in

combustion chamber

3. Inspect engine support seat.

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

Fault definition
for badness,
instability, error
or underspeed of
idle speed:
starting in the
course of idling.

Engine runs
unsteadily. In
extreme cases,
the engine or the
vehicle will
tremble. With a
certain throttle
opening, the
engine idle speed
may fluctuate.
Any of these
circumstances is
likely to be
serious enough to
make the engine
stall.

4. Electromagnetic

Interference

(EMI) in the voltage circuit may
lead to engine misfire. Use a
fault diagnosis tester to monitor
the engine speed to detect
electromagnetic interference.
Engine speed parameter
suddenly increases while the
actual engine speed does almost
not change, then there is
electromagnetic interference. If
there is a fault, inspect whether
there is a high voltage
component in the vicinity of the
ignition control circuit.

-

1. ECM power supply circuit

Refer to 2.2.7.43 DTC P0562 P0563

2. Incorrect Fuel No.

3. Abnormal Fuel Pressure

4. Abnormal

Injector

Working

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

5. Mixture Too Thin

Refer to 2.2.7.26 DTC P0171 P0172
P1167 P1171 P2187 P2188

6. Knock Sensor (KS) system

ignition delay is too large

7. Spark Plug Heat Value Incorrect

Refer to 2.10.7 Diagnostic
Information and Procedures in the
2.10 Ignition System

Fault Definition
for Conflagration
and Ignition
Knocking:
Knocking sound
is worsen during
accelerating.
With the throttle
opening changes,
the engine will
generate a sharp
metal beating
sound at the
cylinder.

8. Cooling system: too low oil

level, incorrect coolant, coolant

Refer to 2.8.7 Diagnostic Information
and Procedures in the 2.8 Cooling

119

leakage, cooling fan does not
rotate

System

9. Too Much Oil in Combustion

Chamber and the Valve Sealing
Leaking

10. Cylinder compression [reassure

too high

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

11. Too much carbon residue in

combustion chamber

12. Abnormal Camshaft, Cylinder

Hood, Piston, Connecting Rod
and Bearing

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

1. Too Much Oil in Combustion

Chamber and the Valve Sealing
Leaking

2. Excessive Carbon Residue in

Combustion Chamber

3. Timing

Chain

Installation

Incorrect

4. Cylinder

compression

pressure

is incorrect

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

Engine difficult
to start

Fault Definition:
The engine
crankshaft
rotation is
normal, but the
vehicle can not
be started in a
long time. The
engine is finally
able to start, but
may immediately
stop.

fire.

5. Fuel Pump Relay, Fuel Pump,

Fuel Injector, Fuel
Contamination

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

1. Ignition System: Ignition Wire,

Spark Plug, Ignition Coil

Refer to 2.10.7 Diagnostic
Information and Procedures in the
2.10 Ignition System

2. ECM Power Supply

Refer to 2.2.7.43 DTC P0562 P0563

3. Engine coolant temperature

sensor

Refer to 2.2.7.20 DTC P0117 P0118

4. Electronic Throttle Body

Refer to 2.2.7.53 DTC P2135

Engine difficult
to start

Fault Definition:
The engine
crankshaft
rotation is
normal, but the
vehicle can not
be started in a
long time. The
engine is finally
able to start, but
may immediately
stop.

fire.

5. Acceleration

Pedal

Position

Sensor

Refer to 2.2.7.54 DTC P2138

1. ECM power supply circuit

Refer to 2.2.7.43 DTC P0562 P0563

2. Abnormal Fuel Pressure

Fault Definition
for back fire and
blast: Unburned
gases entering the
intake manifold

3. Fuel

Contamination

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

120

4. Abnormal

Injector

Working

5. Air Leakage in Intake System

and Crankcase

6. Positive

Crankcase

Ventilation

Valve

Refer to 2.4.6 Diagnostic Information
and Procedures in the 2.4 Auxiliary
Emission Control Devices

7. Knock Sensor (KS) system

ignition delay is too large

Refer to 2.2.7.34 DTC P0324 P0325

8. Spark plug: incorrect heat value,

humidified, cracked, incorrect
clearance, excessive burning
Carbon deposit is too much. It is
polluted by fuel.

9. Spark Plug Wire Damage

10. Ignition Coil Damage

Refer to 2.10.7 Diagnostic
Information and Procedures in the
2.10 Ignition System

or the exhaust
system will be
ignited,
producing a very
loud cracking
sound.

11. Coolant level is too low,

thermostat is faulty.

2.8.7 Diagnostic Information and
Procedures in the 2.8 Cooling System

1. ECM power supply circuit

Refer to 2.2.7.43 DTC P0562 P0563

2. Air-Conditioning

Compressor

Refer to 8.2.7 Diagnostic Information
and Procedures in 8.2 Automatic
Air-conditioning

3. Abnormal Heated Type Oxygen

Sensor

Refer to 2.2.7.22 DTC P0131 P0132
P0133 P0134.

4. Poor Fuel Quality, Fuel

Contamination

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

5. Abnormal Fuel Pressure

6. Abnormal

Injector

Working

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

7. Mixture Too Thick

Fault Definition
for surge: When
the throttle
opening is stable,
the engine power
changes. The
vehicle speed
changes while the
acceleration
pedal position
does not change.

8. Mixture Too Thin

Refer to 2.2.7.26 DTC P0171 P0172
P1167 P1171 P2187 P2188

9. Intelligent Variable Valve

Timing System

10. Vacuum Hose Cracking or Kink,

Connection Unreliable

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

11. Spark Plug: Incorrect thermal

value, damp, crack, incorrect
gap, excessive erosion,
excessive carbon residue,

Refer to 2.10.7 Diagnostic
Information and Procedures in the
2.10 Ignition System

121

contaminated by fuel

12.Spark plug guide wire damaged

13. Ignition Coil Damage

1. ECM power supply circuit

Refer to 2.2.7.43 DTC P0562 P0563

2. Air filter element plug

-

3. Poor Fuel Quality, Fuel

Contamination

4. Abnormal Fuel Pressure

5. Abnormal

Injector

Working

Refer to 2.3.7 Diagnostic Information
and Procedures in the 2.3 Fuel
System

6. Mixture Too Thick

7. Mixture Too Thin

Refer to 2.2.7.26 DTC P0171 P0172
P1167 P1171 P2187 P2188

8. Knock Sensor (KS) system

ignition delay is too large

9. Spark Plug: Incorrect thermal

value, damp, crack, incorrect
gap, excessive erosion,
excessive carbon residue,
contaminated by fuel

10. Spark Plug Wire Damage

11. Ignition Coil Damage

Refer to 2.10.7 Diagnostic
Information and Procedures in the
2.10 Ignition System

12. Crankshaft Position Sensor

Refer to 2.2.7.35 DTC P0335 P0336

13. Too Much Oil in Combustion

Chamber or Valve Seals
Leakage

14. Cylinder compression pressure

is incorrect

15. Valve Catching or Leakage,

Broken Valve Spring, Incorrect
Valve Timing

16. Too much carbon residue in

combustion chamber

17. Intelligent Variable Valve

Timing System

Refer to 2.6.7 Diagnostic Information
and Procedures in the 2.6 Mechanical
System

Fault definition
for insufficient
power, viscosity
or weakness: The
engine power
output is lower
than expected.
Half- press the
acceleration
pedal, almost no
acceleration or no
acceleration at
all.

18. Exhaust Blocked: Three-Way

Catalytic Converter Blocked,

Refer to 2.7.5 Diagnostic Information
and Procedures in the 2.7 Exhaust

122