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