Geely Diagnosis Flow. Manual part — 36

141

Yes Diagnosis

help

5

Check voltage between 2# pin of two-cylinder oil injector connector and
cathode of power source is around 3.7V with multimeter.

No Next

step

Yes

Repair or replace
harness

6

Check lines between 2# pin of two-cylinder oil injector connector and 6# pin
of ECU are opened or shorted to power source or ground.

No Diagnosis

help

No.086 Malfunction code: P0203 "three-cylinder oil injector circuit

malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes

To step 4

2

Take out connector of three-cylinder oil injector of harness, and check
voltage between 1# pin of this harness and cathode of power source is
around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 1# pin of connector of three-cylinder oil injector and
main relay are opened or shorted to ground.

No Next

step

Yes Next

step

4

Check resistance between 1# and 2# pins of three-cylinder oil injector is
between 11~13Ω under 20 with multimeter.

℃

No

Replace oil injector

Yes Diagnosis

help

5

Check voltage between 2# pin of three-cylinder oil injector connector and
cathode of power source is around 3.7V with multimeter.

No Next

step

Yes

Repair or replace
harness

6

Check lines between 2# pin of three-cylinder oil injector connector and 7#
pin of ECU are opened or shorted to power source or ground.

No Diagnosis

help

No.087 Malfunction code: P0204 "four-cylinder oil injector circuit

malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch to
“ON”.

Next

step

Yes

To step 4

2

Take out connector of four-cylinder oil injector of harness, and check voltage
between 1# pin of this connector and cathode of power source is around 12V
with multimeter.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 1# pin of connector of four-cylinder oil injector and main
relay are opened or shorted to ground.

No Next

step

4

Check resistance between 1# and 2# pins of four-cylinder oil injector is
between 11~13Ω under 20 with multimeter.

℃

Yes Next

step

142

No

Replace oil injector

Yes Diagnosis

help

5

Check voltage between 2# pin of four-cylinder oil injector connector and
cathode of power source is around 3.7V with multimeter.

No Next

step

Yes

Repair or replace
harness

6

Check lines between 2# pin of four-cylinder oil injector connector and 47# pin of
ECU are opened or shorted to power source or ground.

No Diagnosis

help

No.088 Malfunction code: P0230 "oil pump control circuit malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “OFF”.

Next

step

Yes

To step 4

2

Take out oil pump relay, and place ignition switch at “ON”. Check power
supply terminal of oil pump relay, i.e. voltage between 30#, ,, , 86#
pins of relay and cathode of power source is around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines at power supply terminal of relay are opened or shorted to
ground.

No

To step 2

Yes

Replace oil pump
relay

4

Check control terminal of oil pump relay with multimeter, i.e. voltage
between 85# pin of relay and cathode of power source is around 3.7V.

No Next

step

Yes

Repair or replace
harness

5

Check control terminal of relay, i.e. lines between 85# pin of relay and 69#
pin of ECU are opened or shorted to power source or ground.

No Diagnosis

help

No.089 Malfunction code: P0325 "knock sensor circuit malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “OFF”.

Next

step

Yes Next

step

2

Take out connector of knock sensor of harness, and check resistance
between 1# and 2# pins of knock sensor is larger than 1MΩwith the
multimeter.

No Replace

sensor

3

Check lines respectively between 1#, 2# of knock sensor connector and
19#, 20# of ECU are opened, or shorted to power source or to ground.

Yes

Repair or replace
harness

143

No Next

step

Yes Diagnosis

help

4

According to the specification, replace knock sensor. Start the vehicle and
make rotating speed of the engine exceed 2200 revolutions per minute.
Recheck malfunction code P0325 will appear again.

No

Check as chance
failure

No.090 Malfunction code: P0335 “crankshaft position sensor signal

malfunction”

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “OFF”.

Next

step

Yes Next

step

2

Take out connector of speed sensor of harness, and check resistance
between 2# and 3# pins of speed sensor is between 770~950Ω under 20

℃

with the multimeter.

No Replace

sensor

Yes

Repair or replace
harness

3

Check lines respectively between 2#, 3# of speed sensor connector and
34#, 15# of ECU are opened, or shorted to power source or to ground.

No Next

step

Yes Diagnosis

help

4

Check signal panel of flywheel is good.

No

Replace signal
panel

No.091 Malfunction code: P0336 “crankshaft position sensor signal

with unreasonable malfunction”

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “OFF”.

Next

step

Yes Next

step

2

Take out connector of speed sensor of harness, and check resistance
between 2# and 3# pins of speed sensor is between 770~950Ω under 20

℃

with the multimeter.

No Replace

sensor

Yes

Repair or replace
harness

3

Check lines respectively between 2#, 3# of speed sensor connector and
34#, 15# of ECU are opened, or shorted to power source or to ground.

No Next

step

4

Check signal panel of flywheel is good.

Yes Diagnosis

help

144

No

Replace signal
panel

No.092 Malfunction code: P0340 “Phase sensor signal malfunction”

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes

To step 4

2

Take out connector of phase sensor of the harness, and check voltage
between 3# and 1# pins of phase sensor connector is around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 3# pin of phase sensor and 87# pin of main relay are
opened or shorted to earth;
Check 1# pin of phase sensor is poorly earthed.

No Next

step

Yes

To step 6

4

Check voltage between 2# pin of phase sensor connector and cathode of
power source is about 9.9V.

No Next

step

Yes

Repair or replace
harness

5

check lines between 2# pin of phase sensor connector and 79# pin of ECU
are opened or shorted to power source or earth;

No Next

step

Yes Diagnosis

help

6

Check signal panel of camshaft is good.

No

Replace signal
panel

No.093 Malfunction code: P0342 “circuit voltage of phase sensor too

low”

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes

To step 4

2

Take out connector of phase sensor of the harness, and check voltage
between 3# and 1# pins of phase sensor connector is around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 3# pin of phase sensor and 87# pin of main relay are
opened or shorted to earth;
Check 1# pin of phase sensor is poorly earthed.

No Next

step