Geely Diagnosis Flow. Manual part — 4

13

No. 007 Poor accelerating performance in cold condition

Malfunction Cause

Solution

Improper gasoline quality

Clean fuel pipe and replace clean gasoline, 93# or above.

Low gasoline pressure

Check filter, whether it is blocked. As well as fuel pressure
controller, whether it operates normally, replace it when
necessary. Check gasoline pump pressure whether the value
is normal, maintain or replace it when necessary.

Air filter blocked

Check air filter, whether it is blocked, clean or replace it when
necessary.

Low cylinder pressure

Check cylinder pressure, whether there is carbon deposit at
intake valve, as well as valve leaking and cylinder wearing
malfunction. Maintain or replace then according to the
malfunction.

Idle speed controlling valve or
stepping motor operates abnormal

Clean or replace idle speed control valve or stepping motor

Throttle malfunction

Check throttle body, whether it is stuck, clean or replace it
when necessary.

Ignition system malfunction

Check ignition coil, wire and spark plug, whether they are
malfunction, replace them when necessary.

Intake temperature pressure sensor

Pressure sensor malfunction. Check the resistance and
voltage, whether the value is in normal range. Replace the
sensor when necessary.

Oxygen sensor malfunction

Check oxygen sensor, whether the heating function is normal.
As well as the voltage signal, whether it varies between 0.1V
and 0.9V.

Intake manifold leaking

Check the vacuum, whether the value is in normal range.
Check the connecting condition of each vacuum hose, as well
as intake/exhaust manifold gasket, whether it is damaged.

Ignition timing maladjustment

Check tachometer sensor signal and ignition datum, whether
they are normal.

Poor accelerating
performance in cold
condition,
particularly in low
speed and middle
speed.

ECU and connecting circuit
malfunction

Check ECU, whether it is malfunction. Check connecting wire,
whether it is of poor contact. Maintain or replace it when
necessary.

14

Poor accelerating performance in cold condition

Improper gasoline quality or low gasoline

pressure

Air filter blockage

Low cylinder pressure

Idle speed valve or throttle malfunction

Ignition system malfunction

Intake temperature pressure sensor

Oxygen sensor malfunction

Intake manifold leaking

Ignition timing maladjustment

ECU and connecting wire malfunction

Replace

Check or replace

Check

Clean

Check or replace

Replace

Check or replace

Check and adjust

Check

Check

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Stuck

Low

Blocked

Lack

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

15

No. 008 Spark plug non-sparking

Malfunction Cause

Solution

Ignition coil malfunction

Measure the primary winding, the resistance shall be 0.4~0.6Ω, and the
secondary winding, the resistance shall be 11~15kΩ. Otherwise shall replace
ignition coil. Check the coil, whether there is short or open circuit. Replace it
when necessary.

Spark plug malfunction

Check spark plug, whether it is leaking current, as well as the clearance of
electrode.

Distributor cover or distributor
arm malfunction

Check cover or distributor arm, whether there is current leaking, dielectric
puncture or damage. Replace it when necessary.

Ignition wire malfunction

Check ignition wire, whether it is leaking current or open circuit. Replace it
when necessary.

Tachometer sensor
malfunction or the Hall sensor
in distributor malfunction

Measure sensor resistance (UAES 4-cylinder engine tacho sensor resistance
shall be 770~950Ω, Delphi 540Ω, Polarsun 530±50Ω), as well as the signal
output and ECU wire, whether they are operating normally. Maintain it when
necessary.

EFI fuse and relay malfunction

Check EFI fuse, whether it is burnt or poor contact. Check main relay,
whether it is burnt. Check the circuit, whether it is poor contact. Maintain
them when necessary.

ECU malfunction

Check terminal input and output signal, whether they are normal.

Ignition control system circuit
malfunction

Check all connecting wires, whether they are poor contact or open circuit.
Maintain it when necessary.

Engine has
no start
symptom
and spark
plug
non-sparking

Engine anti-thief control
system malfunction

Check anti-thief controller and all connecting wires, whether they are normal
connected, as well as the anti-thief status activated.

16

Spark plug non-sparking

Ignition coil malfunction

Spark plug malfunction

Distributor cover or distributor arm malfunction

Ignition wire malfunction

Tachometer sensor failure or the Hall sensor in

distributor malfunction

ECU malfunction

Ignition control system circuit malfunction

Engine anti-thief control system malfunction

Adjust or replace

Replace

Check

Replace

Replace

Replace

Replace

Replace

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Normal

Normal

Normal

Normal

Normal

Normal

Normal