3 PUESTA EN SERVICIO Y MANTENIMIENTO
3.10 Limpieza anual
(Note: following diagnosis flowchart is applied when malfunction codes such as admission pressure sensor,
canister control valve, oxygen sensor do not occur at the same time; if relevant malfunction codes exist at the
same time, deal with other malfunctions, and then check according to the following flowchart.)
Serial No. Operation steps Results Follow-ups
1 Switch on diagnosis instrument and commutator, and place ignition switch to “ON”. Next step
Yes Next step
2
Start the engine, and make it operate at idling speed, till temperature of cooling liquid reached normal value. Under full condition, observe changes of value of “voltage of oxygen sensor” on the diagnosis instrument, and
check the value is around 900mV under some conditions for a long time. No Diagnosis help
Yes Next step
3 Switch on fuel pressure gauge at oil inlet pipe of fuel system, and observe pressure is around 350kPa under full condition.
No Repair fuel system
4 Check lines respectively between 36#, 18# pins of ECU and A# (opposed to grey connecting line of oxygen sensor), B# (opposed to black connecting line of oxygen sensor) of sensor connector are shorted to power source. Yes
Repair or replace harness
No Next step
Yes Repair accordingly 5
A. Oil injector is leaking; B. Exhaust pipe is leaking; C. Ignition timing is incorrectly; etc.
No Diagnosis help
No.084 Malfunction code: P0201 "one-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 one-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 one-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 one-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 one-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 one-cylinder oil injector connector and 27# pin of ECU are opened or shorted to power source or ground.
No Diagnosis help
No.085 Malfunction code: P0202 "two-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 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
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"
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