3 PUESTA EN SERVICIO Y MANTENIMIENTO
3.5 Quemador de dos etapas
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 5
2
Observe “intake temperature” of data flow, and check it is equal to temperature within air inlet pipe (specific value related to engine temperature at that time). Note: if value is -40 at this point, then ℃
disconnection malfunction may occur to lines. No Next step
Yes Next step
3
Take out connector of intake temperature sensor of the harness, and check resistance between 1# and 2# pins of sensor is suitable to its temperature with multimeter (for details, refer to related parts of this maintenance
manual). No Replace sensor
Yes To step 5
4 Take out connector of intake temperature sensor of the harness, and check voltage between 1# and 2# pins of this connector is around 5V.
No Next step
Yes Repair or replace harness 5 Check lines between 17#, 40# pins of ECU and 1#, 2# pins of sensor connector are shorted to ground.
No Next step
Yes Diagnosis help
6
Start the engine, and make it operate at idling speed. Observe changes of values of “intake temperature” on the diagnosis instrument, and values shall rise as temperature of cooling liquid of the engine rises at this time.
No Replace sensor
No.074 Malfunction code: P0117 "temperature indicated by cooling
liquid temperature 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 6
No Next step
Yes Repair or replace harness 5 Check lines between respectively 39#, 35# pins of ECU and 1#, 2# pins of sensor connector are opened, or shorted to power source.
No Next step
Yes Diagnosis help
6
Start the engine, and make it operate at idling speed. Observe changes of values of “temperature of cooling liquid” on the diagnosis instrument, and values shall rise as temperature of cooling liquid of the engine rises at this
time. No Replace sensor
No.075 Malfunction code: P0118 "temperature indicated by cooling
liquid temperature sensor too high"
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 6
2
Observe “temperature of cooling liquid” of data flow, and check it is equal to engine temperature (specific value related to engine temperature at that time). Note: if value is -40 at this point, then disconnection malfunction ℃
may occur to lines. No Next step
Yes Next step
3
Take out connector of temperature sensor of cooling liquid of the harness, and check resistance between 1# and 2# pins of sensor is suitable to its temperature with multimeter (for details, refer to related parts of this
maintenance manual). No Replace sensor
Yes To step 6
4 Take out connector of temperature sensor of cooling liquid of the harness, and check voltage between 1# and 2# pins of this connector is around 5V.
No Next step
Yes Repair or replace harness 5 Check lines between respectively 39#, 35# pins of ECU and 1#, 2# pins of sensor connector are shorted to ground.
No Next step
Yes Diagnosis help
6
Start the engine, and make it operate at idling speed. Observe changes of values of “temperature of cooling liquid” on the diagnosis instrument, and values shall rise as temperature of cooling liquid of the engine rises at this
time. No Replace sensor
No.076 Malfunction code: P0122 "voltage of throttle valve position
sensor circuit too low"
Serial No. Operation steps Results Follow-ups
Yes Next step 2 Observe "absolute opening of throttle valve" of data flow, and value is between 4%-10% (specific value depends on vehicle model).
No To step 5
Yes Next step
3
Step the throttle to full opening and observe "absolute opening of throttle valve" of data flow, and value will be increased to about 85-95% as opening of throttle valve is increased (specific value depends on vehicle model).
No To step 5
Yes Replace sensor
4 Repeat Step 3, and observe "absolute opening of throttle valve" of data flow, and value is abruptly changed during changes.
No Next step
Yes Repair or replace harness 5 Take out connector of throttle valve position sensor of harness, and check lines between respectively 17#, 32#, 16# pins of ECU and 1#, 2#, 3# pins of
sensor connector are shorted to ground.
No Next step
Yes Replace sensor
6 Check voltage between 1# and 2# pins of this connector is around 5V with multimeter.
No Diagnosis help
No.077 Malfunction code: P0123 "voltage of throttle valve position
sensor circuit too high"
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 Observe "absolute opening of throttle valve" of data flow, and value is between 4%-10% (specific value depends on vehicle model).
No To step 5
Yes Next step
3 Step the throttle to full opening and observe "absolute opening of throttle valve" of data flow, and value will be increased to about 85-95% as opening of throttle valve is increased (specific value depends on vehicle model).
No To step 5
Yes Replace sensor
4 Repeat Step 3, and observe "absolute opening of throttle valve" of data flow, and value is abruptly changed during changes.
No.078 Malfunction code: P0130 "signal circuit of upstream oxygen
sensor malfunction"
(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 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 Diagnosis help
2
Start the engine, and make it operate at idling speed, till temperature of cooling liquid reached normal value. Observe changes of value of “voltage of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time. No Next step
Yes Repair or replace harness 3 Check lines respectively between 36#, 18# 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 ground.
No Next step
Yes Repair accordingly 4
A. Check admission system is severely leaking; B. Oil injector is blocked;
C. Spark plug is with too large clearance; D. Resistance of sub live wire is too large;
E. Tube of intake valve is worn; etc. No Diagnosis help
No.079 Malfunction code: P0132 "voltage of upstream oxygen sensor
circuit too high"
(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 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 Diagnosis help
2
Start the engine, and make it operate at idling speed, till temperature of cooling liquid reached normal value. Observe changes of value of “voltage of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time. No Next step
Yes Repair or replace 3
Check lines respectively between 36#, 18# 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. No Diagnosis help
No.080 Malfunction code: P0134 "upstream oxygen sensor signal
malfunction"
(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 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 Diagnosis help
2
Start the engine, and make it operate at idling speed, till temperature of cooling liquid reached normal value. Observe changes of value of “voltage of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time. No Next step
Yes Repair or replace harness 3 Check lines respectively between 36#, 18# 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 opened.
No Diagnosis help
No.081 Malfunction code: P0135 "heating circuit of upstream oxygen
sensor malfunction"
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
Take out connector of oxygen sensor of harness, and check voltage between C# (opposed to white connecting line of oxygen sensor), D# (opposed to white connecting line of oxygen sensor) pins of this connector
is around 12V with multimeter. No To step 4
Yes Next step
3 Check resistance between C# (white), D# (white) pins of oxygen sensor is between 2~5Ω under 20 with multimeter.℃
No Replace sensor
Yes Replace fuse
4 Check 8A fuse of heating circuit of oxygen sensor is blown.
No Next step
Yes Repair or replace harness 5
Check lines respectively between 1# pin of ECU, 87# pin of main relay and C# (opposed to white connecting line of oxygen sensor), D# (opposed to white connecting line of oxygen sensor) of sensor connector are opened, or
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 100mV 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
Yes Repair or replace harness 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.
No Next step
Yes Repair accordingly 5
A. Check admission system is severely leaking; B. Oil injector is blocked;
C. Spark plug is with too large clearance; D. Resistance of sub live wire is too large;
E. Tube of intake valve is worn; etc. No Diagnosis help