Diagnostic Trouble Code (DTC) Detecting Criteria (h4so) Subaru Impreza WRX GD/GG рестайлинг 2

LIST

DIAGNOSTIC TROUBLE CODE LIST REFERENCE

OUTLINE OF DIAGNOSIS

Detect NG from Low NG or High NG.

Variable valve lift diagnosis oil pressure switch is attached for diagnosis, ON or OFF of variable valve lift diagnosis oil pressure switch shows whether intake valve is in High mode (increasing the lift amount) or Low mode (decreasing the lift amount).

1. Normal condition NORMAL CONDITION REFERENCE Oil switching solenoid valve duty Intake valve Variable valve lift diagnosis oil pressure switch Large High mode ON Small Low mode OFF
2. Low NG

Judge Low NG when variable valve lift diagnosis oil pressure switch remains OFF though the intake valve is being shifted to High mode (Oil switching solenoid valve duty: large).

1. High NG

Judge High NG when variable valve lift diagnosis oil pressure switch remains ON though the intake valve is being shifted to Low mode (Oil switching solenoid valve duty: small).

COMPONENT DESCRIPTION

Variable valve lift system optimizes the lift amount of intake valve with switching low lift cam and high lift cam depending on engine speed. Variable valve system changes the lift amount of intake valve with duty controlling oil switching solenoid valve.

Identifying Oil Switching Solenoid Valve. Scheme 1

ENABLE CONDITION

ENABLE CONDITION DESCRIPTION

GENERAL DRIVING CYCLE

Perform the diagnosis continuously after 6 seconds from engine starting with controlling of variable valve lift.

DIAGNOSTIC METHOD

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than the specified time.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time needed for diagnosis

0.784 seconds (Low side)

3.0 seconds (High side)

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the continuous time of completing malfunction criteria becomes more than 3 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

DTC CLEAR CONDITION

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION

1. When the OK cycle was completed 3 times in a row
2. When "Clear Memory" was performed

FAIL SAFE

None

ECM OPERATION AT DTC SETTING

Memorize the freeze frame data. (For test mode $02)

DTC P0028 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PERFORMANCE (BANK 2)

Note. For the diagnostic procedure, refer to DTC P0026 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PERFORMANCE (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect the malfunction of front oxygen (A/F) sensor heater.

Judge NG when impedance of front oxygen (A/F) sensor is larger than the standard value by referring to the engine condition such as fuel shut-off in deceleration, etc.

Identifying Front Oxygen Sensor Components. Scheme 2

ENABLE CONDITION DESCRIPTION

Perform diagnosis continuously in 50 seconds after starting engine.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than the time needed for diagnosis (10 seconds). Judge OK and clear NG when the continuous time of not completing the malfunction criteria below becomes more than the time needed for diagnosis (10 seconds).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 10 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor main learning correction: Not allowed to calculate
2. Front oxygen (A/F) sensor sub learning correction: Do not calculate.
3. Purge control: Not allowed to purge

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of heater.

The heater conducts the duty control. The output terminal voltage at ON becomes 0 V, and the output terminal voltage at OFF becomes battery voltage.

Judge NG when the terminal voltage remains to be Low.

Identifying Front Oxygen Sensor Heater Output Voltage Graph. Scheme 3

ENABLE CONDITION DESCRIPTION

Always perform diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 second (8 cycles).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when all the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor heater control: Not allowed to turn on the heater.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
4. Purge control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of heater.

The heater conducts the duty control. The output terminal voltage at ON becomes 0 V, and the output terminal voltage at OFF becomes battery voltage.

Judge NG when the terminal voltage remains to be High.

Identifying Oxygen Sensor Heater Output Voltage Graph. Scheme 4

ENABLE CONDITION DESCRIPTION

Always perform diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes 1 second (8 cycles).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when all the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor heater control: Not allowed to turn on the heater.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
4. Purge control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect open or short circuit of oxygen sensor heater.

Oxygen sensor heater conducted the duty control, and the output terminal voltage at ON is 0 V and the output terminal voltage at OFF is the battery voltage.

Judge NG when the terminal voltage remains to be Low.

Oxygen Sensor Heater Output Voltage Cycle. Scheme 5

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously after engine starting.

1. Abnormality Judgment

Judge NG when the continuous time of completing all the malfunction criteria below becomes more than 2,560 millisecond (10 cycles).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.56 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when all the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

Memorize the freeze frame data. (For test mode $02)

Detect open or short circuit of oxygen heater.

Oxygen heater conducted the duty control, and the output terminal voltage at ON is 0 V and the output terminal voltage at OFF is the battery voltage.

Judge NG when the terminal voltage remains to be High.

Oxygen Heater Output Voltage Cycle. Scheme 6

JUDGMENT VALUE REFERENCE CHART

Perform the diagnosis continuously after engine starting.

1. Abnormality Judgment

Judge NG when the continuous time of completing all the malfunction criteria below becomes more than 2,560 milliseconds (10 cycles).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.56 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when all the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of intake manifold pressure sensor output property. Judge NG when the intake air pressure AD value is Low whereas it seemed to be High from the viewpoint of engine condition, or when it is High whereas it seemed to be Low from the engine condition.

Identifying Connector Terminal And Voltage Graph. Scheme 7

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously after idling.

1. Abnormality Judgment

Judge NG when either Low side or High side becomes NG. Judge NG when the continuous time of completing the malfunction criteria below becomes more than the predetermined time.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: Low side 3 seconds, high side 7 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when both Low side and High side become OK. Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Intake manifold pressure sensor process: Estimate the pressure from engine load.
2. ISC feedback: Not allowed to calculate the amount of feedback.

Memorize the freeze frame data. (For test mode $02)

Detect the open circuit of oil switching solenoid valve.

Judge open circuit NG when the current is small though output duty is large.

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality judgment

Judge NG when the continuous time of completing malfunction criteria below becomes more than 2 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time needed for diagnosis: 2 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the continuous time of completing the malfunction criteria below becomes more than 2 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Memory Clear" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Memory Clear" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the short circuit of oil switching solenoid valve.

Judge short circuit NG when the current is large though output duty is small.

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality judgment

Judge NG when the continuous time of completing malfunction criteria below becomes more than 2 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time needed for diagnosis: 2 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the continuous time of completing the malfunction criteria below becomes more than 2 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Memory Clear" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Memory Clear" was performed

None

Memorize the freeze frame data. (For test mode $02)

DTC P0082 INTAKE VALVE CONTROL CIRCUIT LOW (BANK 2)

Note. For the detecting criteria, refer to DTC P0076 INTAKE VALVE CONTROL CIRCUIT LOW (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.

DTC P0083 INTAKE VALVE CONTROL CIRCUIT HIGH (BANK 2)

Note. For the detecting criteria, refer to DTC P0077 INTAKE VALVE CONTROL CIRCUIT HIGH (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect the malfunction of air flow sensor output property. Judge Low side NG when the air flow voltage indicates low value in spite of the driving condition that the air flow voltage might be high; otherwise, judge High side NG when the air flow voltage indicates high value in spite of the driving condition that the air flow voltage might be low. Judge air flow sensor property NG when the Low side or High side becomes NG.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Voltage Volume Graph. Scheme 8

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously after idling.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than the time needed for diagnosis.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis

Low side 3 seconds

High side 10 seconds

Malfunction Indicator Light Illumination :Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK the when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of air flow sensor. Judge NG when out of the standard value.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Voltage Volume Graph. Scheme 9

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of air flow sensor. Judge NG when out of the standard value.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Voltage Volume Graph. Scheme 10

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time until completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of intake manifold pressure sensor. Judge NG when out of the standard value.

Identifying Connector Terminal And Voltage Pressure Graph. Scheme 11

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

ISC feedback: Not allowed to calculate the amount of feedback.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of intake manifold pressure sensor. Judge NG when out of the standard value.

Identifying Connector Terminal And Voltage Pressure Graph. Scheme 12

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

ISC feedback: Not allowed to calculate the amount of feedback.

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of intake air temperature sensor output property. Judge NG when the intake air temperature is not varied whereas it seemed to be varied from the viewpoint of engine condition.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Voltage Volume Graph. Scheme 13

ENABLE CONDITION DESCRIPTION

Perform the diagnosis when the vehicle speed condition is completed after idling from starting the cooled engine.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 second.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Intake air temperature sensor process: Intake air temperature is fixed at 20°C (68°F).

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of intake air temperature sensor. Judge NG when out of the standard value.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Resistance Temperature Graph. Scheme 14

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Intake air temperature sensor process: Intake air temperature is fixed at 20°C (68°F).

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of intake air temperature sensor. Judge NG when out of the standard value.

Identifying Air Flow Sensor, Intake Air Temperature Sensor And Resistance Temperature Graph. Scheme 15

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Intake air temperature sensor process: Intake air temperature is fixed at 20°C (68°F).

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of engine coolant temperature sensor. Judge NG when out of the standard value.

Identifying Connector, Thermistor Element And Resistance Temperature Graph. Scheme 16

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Engine coolant temperature process: Fix the engine coolant temperature at 70°C (158°F).
2. ISC feedback: Calculate the target engine speed setting the engine coolant temperature to 70°C (158°F).
3. ISC learning: Not allowed to learn.
4. Heavy fuel judgment control: Not allowed to carry out the heavy judgment.
5. Air conditioner control: Not allowed to turn the air conditioner to ON.
6. Radiator fan control: Both main and sub fan turn to ON.
7. Tumble generator valve control: Open the tumble generator valve.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of engine coolant temperature sensor. Judge NG when out of the standard value.

Identifying Connector, Thermistor Element And Resistance Temperature Graph. Scheme 17

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.5 seconds. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Engine coolant temperature process: Fix the engine coolant temperature at 70°C (158°F).
2. ISC feedback: Calculate the target engine speed setting the engine coolant temperature to 70°C (158°F).
3. ISC learning: Not allowed to learn.
4. Air conditioner control: Not allowed to turn the air conditioner to ON.
5. Radiator fan control: Both main and sub fan turn to ON.
6. Tumble generator valve control: Open the tumble generator valve.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of throttle position sensor 1.

Judge NG when out of the standard value.

Throttle/Pedal Position Sensor/Switch Circuit Diagram. Scheme 18

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 24 milliseconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

Stop power distribution to electronic throttle control motor. (Throttle opening is fixed to 6°.)

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of throttle position sensor 1.

Judge NG when out of the standard value.

Throttle/Pedal Position Sensor/Switch Circuit Diagram. Scheme 19

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 24 milliseconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

Stop power distribution to electronic throttle control motor. (Throttle opening is fixed to 6°.)

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of engine coolant temperature output property. Judge NG when the engine coolant temperature does not rise whereas it seemed to rise from the viewpoint of the engine condition.

Identifying Connector, Thermistor Element And Resistance Temperature Graph. Scheme 20

ENABLE CONDITION DESCRIPTION

Perform the diagnosis only once after engine starting.

1. Abnormality Judgment

Judge NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Timer for diagnosis after engine starting

1. Timer stop at fuel cut mode.
2. During the driving conditions (except a) above), timer count up by 64 milliseconds + TWCNT milliseconds at every 64 milliseconds.

Where, TWCNT is determined as follows

TWCNT = 0 at idle switch ON

TWCNT show on the following table at idle switch OFF.

VEHICLE SPEED REFERENCE CHART

Judgment value of timer after engine starting

t = 574 - 33 x Ti (Sec.)

Ti is the lowest coolant temperature after starting the engine.

Time Needed for Diagnosis: To be determined. (It is varied by the Min. engine coolant temperature and engine conditions such as vehicle speed and engine coolant temperature.)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Engine coolant temperature process: Fix the engine coolant temperature at 70°C (158°F).
2. ISC feedback: Calculate the target engine speed setting the engine coolant temperature to 70°C (158°F).
3. ISC learning: Not allowed to learn.
4. Air conditioner control: Not allowed to turn the air conditioner to ON.
5. Radiator fan control: Both main and sub fan turn to ON.
6. Tumble generator valve control: Open the tumble generator valve.

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of engine coolant temperature sensor property.

The engine coolant temperature and fuel temperature are memorized when stopping the engine at the previous time. Judge NG when the engine coolant temperature does not decrease in the case the engine coolant temperature seems to decrease after starting the engine this time.

Identifying Connector, Thermistor Element And Resistance Temperature Graph. Scheme 21

ENABLE CONDITION DESCRIPTION

Perform the diagnosis once after starting the engine.

1. Abnormality Judgment

Judge NG when the cumulative time of completing the malfunction criteria below becomes more than 2.5 seconds

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. Normality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illuminations: Detect when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle is completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of thermostat function. Judge NG when the engine coolant temperature is lower than the estimated engine coolant temperature and the difference between them is large. Judge OK when the engine coolant temperature becomes 70°C (158°F) and the difference is small before judging NG.

Identifying Coolant Thermostat Components. Scheme 22

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 30 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: Not fixed.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

Detect the open or short circuit of sensor.

Judge NG when the element impressed voltage is out of range, or the element current is out of range.

Sensor Circuit Low Voltage Graph. Scheme 23

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing any malfunction criteria below becomes more than 1 second.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination :Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor heater control: Not allowed to turned on the heater.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
4. Purge control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of sensor.

Judge NG when the element impressed voltage is out of range, or the element current is out of range.

Sensor Circuit High Voltage Graph. Scheme 24

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing any malfunction criteria below becomes more than 1 second.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor heater control: Not allowed to turned on the heater.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
4. Purge control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect time-lag of front oxygen (A/F) sensor response. Front oxygen (A/F) sensor cover has some ventilation holes for exhaust gas. Clogged ventilation holes are diagnosed. When the holes are clogged, the A/F output variation becomes slow comparing with the actual A/F variation because oxygen which reaches the zirconia layer is insufficient. Therefore, if the cover has clogged holes, the rich to lean judgment in ECM is delayed when the change from rich to lean is caused. Judge NG when the actual A/F variation is slow comparing with the ECM control amount.

Identifying Zirconia And Cover. Scheme 25

Sensor Circuit Slow Response Graph. Scheme 26

ENABLE CONDITION DESCRIPTION

Perform diagnosis only once at a constant speed of 10 to 120 km/h (6.21 to 74.6 MPH) in 120 seconds after starting the engine.

Integrate the difference of fan in every 128 milliseconds and difference of lambda value.

After integrate 210 seconds, calculate the diagnosis value.

Judge NG when the malfunction criteria below are completed. Judge OK and clear NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 210 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor main learning correction: Not allowed to calculate.
2. A/F sub learning correction: Not allowed to calculate.
3. Purge control: Not allowed to purge.

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

Detect the open circuit of sensor.

Judge NG when the element impedance is large.

Sensor Circuit Activity Graph. Scheme 27

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 5 seconds

Malfunction Indicator Light Illumination :Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

1. Front oxygen (A/F) sensor heater control: Not allowed to turned on the heater.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
4. Purge control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of oxygen sensor power distribution NG. Judge NG when the oxygen sensor voltage is abnormal with considering the operating conditions.

Sensor Circuit Low Voltage Graph. Scheme 28

Abnormality Judgement

ENABLE CONDITION DESCRIPTION

Normality Judgement

NORMALITY JUDGEMENT REFERENCE

Perform the diagnosis continuously after starting the engine at engine steady operation condition.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than the time needed for diagnosis. Judge OK when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis

High side: 2.5 seconds

Low side 1: 20 seconds

Low side 2: 40 seconds

Low side 3: Value of Map

Map

DIAGNOSTIC CHART

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

Memorize the freeze frame data. (For test mode $02)

DTC P0138 O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 1 SENSOR 2)

Note. For the detection criteria, refer to DTC P0137 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2) , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect the slow response of rear oxygen sensor.

Judge NG when the Rich --> Lean response diagnosis or Lean --> Rich response diagnosis is NG and judge OK when both response diagnoses are OK.

[Rich --> Lean diagnosis response]

1. When the measured response time is larger than a threshold, since the A/F ratio is rich, the response time of the output change of O 2 sensor when changing from Rich to Lean is measured, and it judges with NG, and when small, it judges with OK.
2. When O 2 sensor voltage at the time of a fuel shut-off in deceleration return is large (rich), it judges with NG.

[Lean --> Rich diagnosis response]

1. The response time of output change of O 2 sensor when an A/F ratio changes from Lean to Rich is measured, and it is referred to as NG when the measured response time is larger than a threshold.
2. It is referred to as NG when O 2 sensor voltage after recovery of fuel shut-off in deceleration is small and still small.

1. Diagnostic Method

Measure the response time of the output change of the oxygen sensor when the A/F ratio changes from rich to lean. And Judge NG when the measured response time is larger than the threshold value.

Sensor Circuit Slow Response Graph. Scheme 29

1. Rich --> Lean response diagnosis

ENABLE CONDITION DESCRIPTION

Perform the diagnosis only once when fuel shut-off in deceleration after rapid acceleration. (Pay attention to oxygen sensor voltage for the timing of deceleration.)

When the oxygen sensor output voltage changes from 0.55 V (rich) to 0.25 V (lean), calculate the Min. value of response time regarded as judgment value while the output varies from 0.5 V to 0.3 V.

Rear Oxygen Sensor Voltage Graph. Scheme 30

1. Abnormality Judgment

1. Judge NG when the judgment value is larger than the threshold value after fuel shut-off in deceleration. Response time (Diagnosis value) > Threshold value --> Abnormal NOTE: Variation time of rear oxygen sensor output voltage is short during fuel shut-off in deceleration. Carry out the NG judgment only after the fuel shut-off in deceleration. As for OK judgment, without the condition of fuel shut-off in deceleration, judge OK if the value is below the threshold value. Judge NG when the malfunction criteria below are completed in 2 seconds after the recovery of fuel shut-off in deceleration which requires 6 seconds or more.
2. Judge NG when the O 2 sensor voltage after recovery of fuel shut-off in deceleration is large. Judge NG when fuel shut-off in deceleration is also long (6 sec. or more), and although carried out the fuel shut-off in deceleration cut return, when O 2 sensor voltage is large (more than 0.55V).

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 time

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgement

1. Judge Normal when the response time (diagnostic value) is smaller than threshold (judgment value) when changing to lean since O 2 sensor voltage.
2. A normal judging is not carried out.

Judgment Value

Judge OK when the following standards value are completed.

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

1. Lean --> Rich response diagnosis

ENABLE CONDITION DESCRIPTION

Perform the diagnosis only once when fuel shut-off in deceleration after rapid acceleration. (Pay attention to oxygen sensor voltage for the timing of deceleration.)

When the oxygen sensor output voltage changes from 0.25 V (lean) to 0.55 V (rich), calculate the Min. value of response time regarded as judgment value while the output varies from 0.3 V to 0.5 V.

Rear Oxygen Sensor Voltage Graph. Scheme 31

1. Abnormality Judgment

1. Judge NG when the judgment value is larger than the threshold value after recovery of fuel shut-off in deceleration. Response time (Diagnosis value) > Threshold value --> Abnormal
2. Judge NG when the O 2 sensor voltage after recovery of fuel shut-off in deceleration is small.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 time

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgement

1. Judge Normal when the response time (diagnostic value) is smaller than threshold (judgment value) when changing to lean since O 2 sensor voltage. Response Time (diagnosis value) < or = Threshold value --> Normal
2. A normal judging is not carried out.

Judgment Value

Judge OK when the following standards value are completed.

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

Detect the malfunction of rear oxygen sensor output property.

Judge Low side NG when the rear oxygen sensor voltage indicates low, otherwise, judge High side NG when the rear oxygen sensor voltage indicates high, in spite of the driving condition that the voltage might move, by referring to the driving condition such as amount of intake air, coolant temperature, main feedback control, fuel shut-off in deceleration, etc.

Judge rear oxygen sensor property NG when the Low side or High side becomes NG.

ENABLE CONDITION DESCRIPTION

Perform the diagnosis once after warming-up the engine.

1. Abnormality Judgment

Judge NG when any of the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 200 second

Malfunction Indicator Light Illumination: Detect when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Sub feedback control: Not allowed

Memorize the freeze frame data. (For test mode $02)

Detect the fuel system malfunction by the amount of main feedback control.

1. Diagnostic Method

Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.

1. Lean side ENABLE CONDITION DESCRIPTION Secondary Parameters Enable Conditions A/F main learning system In operation Engine coolant temperature > or =75°C(167°F) Intake air amount > or = Map 5 Intake air change during 0.5 engine rev. < or = 0.02 g (0.001 oz.)/rev

Map 5

REFERENCE CHART

Perform the diagnosis continuously at engine idling after warm-up or a constant speed.

1. Abnormality Judgment

Judge that the fuel system malfunction occurs when the continuous time of completing the malfunction criteria below becomes more than 50 seconds by comparing the diagnosed value (fsobd) with threshold value.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 4 Threshold value for fuel system malfunction criteria

MALFUNCTION REFERENCE CHART

Time Needed for Diagnosis: 10 seconds x 5 times

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the continuous time of completing the malfunction criteria below becomes more than 10 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When OK with similar drive in 3 driving cycles.
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the fuel system malfunction by the amount of main feedback control.

1. Diagnostic Method

Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.

ENABLE CONDITION DESCRIPTION

Map 5

REFERENCE CHART

Perform the diagnosis continuously at engine idling after warm-up or a constant speed.

1. Abnormality Judgment

Judge that the fuel system malfunction occurs when the continuous time of completing the malfunction criteria below becomes more than 50 seconds by comparing the diagnosed value (fsobd) with threshold value.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 4 Threshold value for fuel system malfunction criteria

MALFUNCTION REFERENCE CHART

Time Needed for Diagnosis: 10 seconds x 5 times

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the continuous time of completing the malfunction criteria below becomes more than 10 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When OK with similar drive in 3 drive cycles.
2. When "Clear Memory" was performed

Purge control solenoid valve control: Not allowed to purge.

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of fuel temperature sensor output property. Perform the diagnosis in two methods; namely, drift diagnosis and stuck diagnosis. Judge NG when either of them results in NG, and judge OK when both of them result in OK.

1. Drift Diagnosis

Normally fuel temperature is lower than engine coolant temperature. When the fuel temperature becomes higher than the engine coolant temperature, the range is considered to be shifted, and make an NG judgment.

Resistance Value And Fuel Temperature Graph. Scheme 32

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 120 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 120 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. Stuck Diagnosis

If the fuel temperature which might rise along with the engine idling (the cumulative amount of intake air after engine starting is large) does not increase, the engine is considered to be stuck and make an NG judgment.

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously in 20 seconds or more after starting the engine.

1. Abnormality Judgment

Judge NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: To be determined.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of fuel temperature sensor. Judge NG when out of the standard value.

Resistance Value And Fuel Temperature Graph. Scheme 33

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK when the cumulative time until completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of fuel temperature sensor. Judge NG when out of the standard value.

Resistance Value And Fuel Temperature Graph. Scheme 34

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK when the cumulative time until completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of engine oil temperature sensor output property.

Judge NG when the engine oil temperature does not increase regardless of the driving condition that engine oil temperature may be thought to increase.

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Timer for diagnosis of oil temperature sensor after engine starting (Timer for diagnosis)

1. Timer stop at fuel cut mode.
2. During the driving condition (except a) above), timer count up by 64ms + TOILCNT ms at every 64ms.

Where, TOILCNT is determined as follows

TOILCNT = 0 at idle switch on

Refer to the following table for TWCNT with idle switch OFF.

DIAGNOSTIC CHART

Judgment value of Timer for diagnosis of oil temperature sensor after engine starting (t)

t = 1,882,940 - 43,302 x Ti (t > or = 1,882,940)

Ti is a lowest engine coolant temperature after starting the engine.

Time needed for diagnosis: To be determined.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Memory Clear" was performed

1. When the OK idling cycle was completed 3 times in a row
2. When "Memory Clear" was performed

Oil temperature sensor process: Fix the engine oil temperature 70°C (158°F)

Memorize the freeze frame data. (For test mode $02)

Detect open or short circuit of engine oil temperature sensor.

Judge NG when out of the standard value.

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing malfunction criteria below becomes more than 0.5 seconds.

Judge OK and clear NG when the malfunction criteria below is not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time needed for diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Memory Clear was performed

1. When the OK idling cycle was completed 3 times in a row
2. When "Memory Clear" was performed

Oil temperature sensor process: Fix the engine oil temperature 70°C (158°F)

Memorize the freeze frame data. (For test mode $02)

Detect the open or the short circuit of engine oil temperature sensor.

Judge NG when out of the judgment value.

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge NG when the continuous time of completing malfunction criteria below becomes more than 0.5 seconds.

Judge OK and clear NG when the malfunction criteria below is not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time needed for diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Memory Clear" was performed

1. When the OK idling cycle was completed 3 times in a row
2. When "Memory Clear" was performed

Oil temperature sensor process: Fix the engine oil temperature 70°C (158°F)

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of throttle position sensor 2.

Judge NG when out of the standard value.

Throttle/Pedal Position Sensor/Switch Low Input Circuit Diagram. Scheme 35

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 24 milliseconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

Stop power distribution to electronic throttle control motor. (Throttle opening is fixed to 6°.)

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of throttle position sensor 2.

Judge NG when out of the standard value.

Throttle/Pedal Position Sensor/Switch Low Input Circuit Diagram. Scheme 36

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 24 milliseconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed (Only with engine stopped)

Stop power distribution to electronic throttle control motor. (Throttle opening is fixed to 6°.)

Memorize the freeze frame data. (For test mode $02)

Detect whether the misfire occurred or not. (Revolution fluctuation method) Monitoring the misfire which influences exhaust deterioration (1.5 times of FTP) and catalyst damage is made obligatory by the law. Misfire affecting these two has three patterns below.

1. Intermittent misfire (The same cylinder misfires in random, or different cylinders misfire in random.): FTP 1.5 times misfire
2. Every time misfire (The same cylinder misfires every time.): FTP 1.5 times misfire, Catalyst damage misfire

The following detecting methods are adopted for these detection.

1. Intermittent misfire: FTP 1.5 times misfire 180° Interval Difference Method (MT: 1,800 rpm or less; AT: None) 360° Interval Difference Method (whole range) 720° Interval Difference Method (3,000 rpm or less)
2. Every time misfire: FTP 1.5 times misfire, Catalyst damage misfire 360° Interval Difference Method

ENABLE CONDITION DESCRIPTION

Map3

MT (Vehicle Speed < 64.4 km/h (40 MPH))

VEHICLE SPEED REFERENCE

MT (Vehicle Speed > 64.4 km/h (40 MPH))

VEHICLE SPEED REFERENCE

AT

VEHICLE SPEED REFERENCE

1. Detecting misfire between idling and high revolution.
2. Perform the diagnosis continuously.

When the misfire occurred, the engine speed is decreased and the crankshaft position speed will change. Calculate the interval difference value (diagnostic value) from crankshaft position speed by the following formula, and judge whether the misfire occurs or not comparing the calculated result with judgment value. Counting the number of misfire up, and if the misfire ratio is higher during 1,000 rev. or 200 rev., judge NG for the corresponding cylinder.

Calculate the diagnostic value (from crankshaft position speed)

> Misfire detection every single ignition (Compare diagnostic value with judgment value)

1. 180° Interval Difference Method
2. 360° Interval Difference Method
3. 720° Interval Difference Method

> NG judgment (Judge misfire occurrence required by the law) (Compare number of misfire with judgment)

1. FTP1.5 times misfire NG judgment
2. Catalyst damage misfire NG judgment

As the following figure, pick out a random cylinder as the standard and name it omg 0. And the former crankshaft position speed is named omg 1, the second former crankshaft position speed is named omg 2, the third is named omg 3, and the following is the same.

Crankshaft Position Speed. Scheme 37

1. 180° Interval Difference Method

Diagnosis value domg 180 = (omg -1 omg 0) - (omg 5 - omg 1)/4

Judge misfire occurs in the following cases.

Scheme 38

1. domg 180 > judgment value of positive side
2. domg 180 < or = judgment value of negative side (judgment value before 180°CA) (Scheme 38): Judge Misfire Occurs Cases Graph

1. 360° Interval Difference Method

Diagnosis value domg 360 = (omg 1 - omg 0) - (omg 3 - omg 2)

Misfire judgment domg 360 > judgment value --> Misfire occurs

Misfire Judgment Graph. Scheme 39

1. 720° Interval Difference Method

Diagnosis value domg 720 = (omg 1 - omg 0) - (omg 5 - omg 4)

Misfire judgment domg 720 > judgment value --> Misfire occurs

Misfire Judgment Graph. Scheme 40

1. FTP 1.5 times misfire (Misfire occurrence level affecting exhaust gas)

Judgment Value (Judge that malfunction occurs when the misfire ratio is high in 1,000 engine revs.)

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1,000 engine revs.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Catalyst damage misfire (Misfire occurrence level damaging catalyst)

Judgment Value (Judge that malfunction occurs when the misfire ratio is high in 200 engine revs. (400 ignitions))

JUDGMENT VALUE REFERENCE CHART

Map 1 Fault criteria threshold for misfire which would result in catalyst damage

JUDGMENT VALUE REFERENCE CHART

These figures mean the misfire ratio (%) in 400 ignitions; for example, 22.5 (%) means 400 (ignition) x 22.5 (%) = 90 (ignition) or more, so this case is judged misfire.

Time Needed for Diagnosis: 200 engine revs.

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

For the diagnostic procedure, refer to DTC P0301 CYLINDER 1 MISFIRE DETECTED , Diagnostic Trouble Code (DTC) Detecting Criteria.

For the diagnostic procedure, refer to DTC P0301 CYLINDER 1 MISFIRE DETECTED , Diagnostic Trouble Code (DTC) Detecting Criteria.

For the diagnostic procedure, refer to DTC P0301 CYLINDER 1 MISFIRE DETECTED , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect the open or short circuit of the knock sensor. Judge NG when out of the standard value.

Identifying Knock Sensor Components. Scheme 41

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 second.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of the knock sensor. Judge NG when out of the standard value.

Identifying Knock Sensor Components. Scheme 42

ENABLE CONDITION DESCRIPTION

Always perform diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 second.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of crankshaft position sensor. Judge NG when the crankshaft signal does not input regardless of turning the starter.

Identifying Camshaft Signal And Crankshaft Signal. Scheme 43

Identifying Crankshaft Position Sensor, Crank Sprocket And Blinking Pattern. Scheme 44

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 3 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 3 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of crankshaft position sensor output property. Judge NG when the number of crankshaft signal every 1 revolution becomes abnormal.

Identifying Camshaft Signal And Crankshaft Signal. Scheme 45

Identifying Crankshaft Position Sensor, Crank Sprocket And Blinking Pattern. Scheme 46

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously under 4,000 rpm engine speed.

1. Abnormality Judgment

Judge NG when all the malfunction criteria below are completed more than 10 times in a row.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 10 engine revs.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of camshaft position sensor. Judge NG when the number of camshaft signal remains to be abnormal.

Identifying Camshaft Signal And Crankshaft Signal. Scheme 47

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the engine speed continues 8 revolutions or more for the malfunction criteria below.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 8 rev.

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of camshaft position sensor output property. Judge NG when the camshaft line signal input timing is shifted from the crankshaft signal because of timing belt tooth chip, etc.

Identifying Camshaft Signal And Crankshaft Signal. Scheme 48

Camshaft Position Sensor Circuit Range/Performance Blinking Pattern. Scheme 49

ENABLE CONDITION DESCRIPTION

Perform the diagnosis at idling continuously.

Judge NG when the engine speed continues 4 revolutions for the malfunction criteria below. Judge OK and clear the NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 4 revs.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of EGR system.

Intake manifold pressure (negative pressure) is stable because the throttle valve is fully closed during the fuel shut-off in deceleration. In this case, the intake manifold pressure changes when EGR valve is opened or closed. Judge EGR system is OK or NG according to intake manifold pressure change amount.

EGR System Circuit Diagram. Scheme 50

ENABLE CONDITION DESCRIPTION

Perform the diagnosis only once at the fuel shut-off in deceleration in vehicle speed more than 53 km/h (approx. 33 MPH). Pay attention to vehicle speed and engine speed. (The diagnosis is not completed if vehicle speed and engine speed are out of condition due to deceleration.)

Measure the pressure in the following procedures when the enable conditions are completed, and then diagnosis by calculating the result.

1. PMOF1 is equal to the intake manifold pressure at enable condition completed, and EGR target step is set to 50 steps (almost fully opened).
2. PMON is equal to the intake manifold pressure in 1 second after EGR target step is set 50 steps (when enable conditions are completed), and EGR target step is set to 0 step.
3. PMOF2 is equal to the intake manifold pressure in 1 second after EGR target step is set to 0 step (in 2 seconds after enable conditions are completed).

1. Abnormality Judgment

Judge NG when the malfunction criteria below is completed. Judge OK when not completed. PMON - (PMOF1 + PMOF2)/2 < 2.48 kPa (18.63 mmHg, 0.733 inHg)

Time Needed for Diagnosis: Once

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Malfunction Indicator Light Graph. Scheme 51

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

A/F main learning: Not allowed

Knock learning: Not allowed

EGR control: Not allowed to operate

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnosis value and trouble standard value. (For test mode $06)

Detect the deterioration of catalyst function.

Though the front oxygen sensor output would change slowly with a new catalyst, the sensor output with a deteriorated catalyst becomes high and the inversion time is shortened. For this reason, the catalyst diagnosis is carried out by monitoring the front oxygen sensor output and comparing it with the front A/F sensor output.

Front Oxygen Sensor Wave Form. Scheme 52

ENABLE CONDITION DESCRIPTION

1. Map 2

Add the following value every 512 milliseconds.

VEHICLE SPEED REFERENCE

Perform the diagnosis once at the constant vehicle speed 70 km/h (43 MPH).

After the malfunction criteria are completed, calculate cumulative value of front oxygen (A/F) sensor lambda deviation (Sum |(sglmd n -sglmd n-1 )|) every 128 milliseconds and cumulative value of rear oxygen sensor output voltage deviation (Sum |(ro2sad n - ro2sad n-1 )|).

Calculate the diagnosis value when the front oxygen (A/F) sensor output fluctuation value more than specified value.

Judge NG when the malfunction criteria below are completed, and judge OK when they are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 30 - 55 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

Perform the diagnosis of leakage of fuels system and valve functions.

Evaporative Emission Control System Leak Detected Diagram. Scheme 53

In this system diagnosis, checking for leakage and valve function is conducted by changing the fuel tank pressure, and monitoring the pressure change using the fuel tank pressure sensor. 0.04 inch diagnosis is performed in the order of mode Z, mode A, mode B, mode C and mode D, and 0.02 inch diagnosis is performed in the order of mode A, mode B, mode C, mode D and mode E.

Scheme 54

1. 0.04-inch Diagnosis (Scheme 54): Large Leakage Judgement Diagram

JUDGMENT VALUE REFERENCE CHART

1. Mode Table for Evaporative Emission Control System Diagnosis

MODE TABLE

Scheme 55

1. 0.02-inch Diagnosis (Scheme 55): Evaporative Emission Control System Diagram

DIAGNOSTIC CHART

1. Pressure Control Solenoid Valve

PCV controls the fuel tank pressure to be equal to the atmospheric air pressure.

Normally, the solenoid is set to OFF. And the valve opens and closes mechanically in accordance with the pressure difference between tank and atmospheric air, or tank and canister.

The valve is forcibly opened by setting the solenoid to ON at the time of diagnosis.

Identifying Pressure Control Solenoid Valve Components. Scheme 56

1. Valve Operation and Air Flow

In the figure below, divided by the diaphragm, the part above X is charged with atmospheric air pressure, and the part below X is charged with tank pressure. Also, the part above Y is charged with tank pressure, and the part below Y is charged with canister pressure.

If the atmospheric air pressure port is A, tank pressure port is B, and canister pressure port is C, the air flows according to pressure difference from each port as shown in the table below.

Valve Operation And Air Flow Diagram. Scheme 57

VALVE OPERATION REFERENCE

When A < B (Solenoid OFF)

Valve Operation And Air Flow Diagram - Solenoid Off Conduction. Scheme 58

When B < C (Solenoid OFF)

Valve Operation And Air Flow Diagram - Solenoid Off Conduction. Scheme 59

When Solenoid is ON

Valve Operation And Air Flow Diagram - Solenoid On Conduction. Scheme 60

1. Drain valve

Drain valve controls the ambient air to be introduced to the canister.

Drain Valve Controls Air Flow Diagram. Scheme 61

1. 0.04-inch Diagnosis ENABLE CONDITION DESCRIPTION Secondary Parameters Enable Conditions Battery voltage > or = 10.9 V Barometric pressure > or =75.1 kPa(563 mmHg, 22.17 inHg) Cumulative time of canister purge 120 seconds or more After engine starting 856 seconds or more Learning value of evaporation gas density < or =0.08 Engine speed 1,050 <----> 6,000 rpm Fuel tank pressure > or = -4.00 kPa (-30 mmHg, -1.18 inHg) Intake manifold vacuum (relative pressure) < -26.7 kPa (-200 mmHg, -7.87 inHg) Vehicle speed > or = 32 km/h (20 MPH) Fuel level 9 <----> 51 l (2.38 <----> 13.47 US gal, 1.98 <----> 11.22 Imp gal) Closed air/fuel ratio control In operation Fuel temperature -10 <----> 45°C(14 <----> 113°F) Intake air temperature > or =-10°C (14°F) Pressure change per second < 0.23 kPa (1.7 mmHg, 0.07 inHg) Min. pressure change per second - Max. pressure change per second < 0.23 kPa (1.7 mmHg, 0.07 inHg) Fuel level change < 2.5 l /128 milliseconds (0.66 US gal/128 milliseconds, 0.55 Imp gal/128 milliseconds) Air fuel ratio 0.76 - 1.25
2. 0.02-inch Diagnosis DIAGNOSTIC CHART Secondary Parameters Enable Conditions (At starting a diagnosis) Evaporation diagnosis Not completed Battery voltage > or = 10.9 V Atmospheric pressure > or = 75.1 kPa (563 mmHg, 22.2 inHg) Since last incomplete diagnosis event of 0.02-inch leakage Cancelled at mode A > 120 seconds Cancelled other than at mode A > 600 seconds Cumulative time of canister purge 120 seconds or more After engine starting 120 second or more Fuel temperature -10 <---->70°C(14 <----> 158°F) Fuel level 9 <----> 51 l (2.38 <----> 13.47 US gal, 1.98 <----> 11.22 Imp gal) Intake manifold vacuum (relative pressure) < -8.0 kPa (-60 mmHg, -2.36 inHg) Fuel tank pressure -0.67 - 1.43 kPa (-5 - 10.7 mmHg,-0.20 - 0.42 inHg) Vehicle speed > or =30km/h(19MPH) Closed air/fuel ratio control In operation Engine speed 550 <----> 6,000 rpm (During diagnosis) Fuel level change < or = Value of Map Pressure change per second < 0.06 kPa (0.44 mmHg, 0.02 inHg) Min. tank pressure change per second - Max. tank pressure change per second < 0.07 kPa (0.51 mmHg, 0.02 inHg) |Tank pressure change per second| < or =0.1 kPa (0.75 mmHg, 0.03 inHg) Pressure change (Mode D) -0.48 <----> 0.32 kPa (-3.6 <----> 2.4 mmHg, -0.14 <----> 0.09 inHg) Pressure change (Mode E) -0.32 <----> 0.32 kPa (-2.4 <----> 2.4 mmHg, -0.09 <----> 0.09 inHg)

Map

DIAGNOSTIC CHART

1. 0.04-inch Diagnosis Perform the diagnosis only once in more than 856 seconds after the engine start at the constant driving speed of 32 km/h (20 MPH) or more. Pay attention to the fuel temperature and fuel level.
2. 0.02-inch Diagnosis Perform diagnosis in more than 770 seconds after engine start at the constant speed of 68 km/h (42 MPH) or more, and judged OK or NG. If not judged OK or NG, repeat the diagnosis. Pay attention to the fuel level.

1. Purge control solenoid valve open malfunction diagnosis

DTC

P0457 Evaporative Emission Control System Leak Detected (fuel cap loose/off)

Purpose of Mode Z

When performing the leakage diagnosis of EVAP system, CPC has to operate normally. Therefore, mode Z is used to diagnose the CPC open fixation.

If the CPC open fixation trouble is detected, the EVAP system leakage diagnosis is cancelled.

Diagnostic method

CPC functional diagnosis is performed by monitoring the tank pressure in Mode Z.

Normality Judgment

Judge OK when the following criteria are satisfied in 3 seconds after Mode Z started, and change to Mode A.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Scheme 62

1. Normal Operation (Scheme 62): Purge Control Solenoid Valve Normal Operation Graph
2. evptez - evptezha < or = 0.4 kPa (3.0 mmHg, 0.12 inHg)
3. evptezini - evptezha < or = 0.4 kPa (3.0 mmHg, 0.12 inHg)

Judge normal when both calculations are completed.

Abnormality Judgment

If OK judgment cannot be made, extend Mode Z 16 seconds more, and judge NG when the criteria below are completed in 16 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 16 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Finish the EVAP. diagnosis when making NG judgment for purge control solenoid valve open fixation. Cancel the EVAP. diagnosis when the OK/NG judgment for purge control solenoid valve open fixation cannot be made in Mode Z.

Scheme 63

1. Purge Control Solenoid Valve Open Fixation (Scheme 63): Purge Control Solenoid Valve Open Fixation Graph
2. evptezini, evptez < or = 1.43 kPa (10.7 mmHg, 0.42 inHg)
3. evptez - evptezha < or = 0.87 kPa (6.5 mmHg, 0.26 inHg)
4. evptezini - evptezha < or = 0.87 kPa (6.5 mmHg, 0.26 inHg)
5. No fuel rolling of above 2 G (0.53 US gal, 0.44 Imp gal) for more than 40 seconds.

Judge normal when all the calculations are completed.

1. Leak Diagnosis

DTC

P0442 Evaporative Emission Control System Leak Detected (small leak)

P0457 Evaporative Emission Control System Leak Detected (fuel cap loose/off)

1. Diagnostic method The diagnostic method consists of creating a sealed vacuum in the fuel tank and then determining the presence of leakage from the speed at which the tank internal pressure returns to atmospheric pressure. The diagnosis is divided into the following five phases.

Mode A: (Estimation of evaporation gas yield)

The amount of change of tank pressure (P1) in Mode A is calculated. After calculating P1, change to Mode B.

Mode B: (Seal negative pressure)

Introduce the negative pressure in the intake manifold to the tank.

Approx. 0 --> -1.4 kPa (0 --> -10.5 mmHg, 0 --> -0.41 inHg)

When the pressure above (desired negative pressure) is reached, Mode C is entered.

In this case, if the tank pressure does not become the desired negative pressure, judge that there is a large leakage in the system, finish the EVAP. diagnosis when judging large leak (10 or 25 seconds).

1. Abnormality Judgment

Judge NG (large leak) when the criteria below are completed in the specified time.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Mode C: (Check increasing pressure)

Stop the introduction of negative pressure. (Wait until the tank pressure returns to the start level of P2 calculation.)

Change to Mode D when the tank pressure returns to the start level of P2 calculation.

Judge immediate OK and change to Mode E when it does not return in spite of spending the specified time.

MODE REFERENCE

Mode D: (Measurement of negative pressure changes)

Monitor the pressure variation in the tank in Mode Z. In this case, the tank pressure increases, that is, the pressure becomes as high as the atmospheric air pressure, because evaporator is generated. However, if any leakage exists, the pressure increases additionally in proportion to this leakage. The pressure variation of this tank is P2.

After calculating P2, perform following small leak diagnosis.

After Mode D

Assigning P1 and P2, which are tank variations measured in Mode A and Mode D, to the formula below, judge the small leakage of the system. If the measured judgment value exceeds the threshold value, it is judged to be malfunction.

1. Abnormality Judgment

Judge NG when the criteria below are completed. Judge OK when not completed and clear the NG.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 7 Limit of malfunction criteria as EVAP. diagnosis.

DIAGNOSTIC CHART

Time Needed for Diagnosis: 30 - 100 Seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous drive cycles.

1. Leak diagnosis

DTC

P0456 Evaporative Emission Control System Leak Detected (very small leak)

1. Diagnostic method The diagnostic method consists of creating a sealed vacuum in the fuel tank and then determining the presence of leakage from the speed at which the tank internal pressure returns to atmospheric pressure. The diagnosis is divided into the following five phases.

Mode A: (0 point correction)

Wait until the tank pressure returns to 0 point (near 0 mmHg) when tank pressure is high. Then change to Mode B. If the tank pressure does not return to 0 point in the specified time, cancel the diagnosis.

Mode B: (Negative pressure introduction)

Introduce the negative pressure in the intake manifold to the tank.

Approx. 0 --> -2.0 kPa (0 --> -15 mmHg, 0 --> -0.59 inHg)

When the pressure above (desired negative pressure) is reached, Mode C is entered.

In this case, if the tank pressure does not become the desired negative pressure, cancel the diagnosis.

Mode C: (Holding negative pressure)

Stop the introduction of negative pressure. (Wait until the tank pressure returns to the start level of P2 calculation.)

Change to Mode D when the tank pressure returns to the start level of P2 calculation, or when spending the specified time.

Mode D: (Calculation of negative pressure variation)

By monitoring the tank pressure at Mode D, calculate the pressure variation (P2) and measure the time (evpdset) it takes the tank pressure to return to the detection completing pressure of P2. Then change to Mode E. When the tank pressure does not return to the detection completing pressure of P2 in the specified time, make advanced OK judgment or cancel the diagnosis according to P2 value.

1. Normality judgment

Judge OK when the following criteria are satisfied.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Mode E (Calculation of yielded evaporation amount)

Calculate the pressure variation (P1) at the time (evpdset), and make NG/OK judgment according to P1 value (ambiguous determination acceptable).

1. Abnormality Judgment

Judge NG when the following criteria are satisfied.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 7 Limit of malfunction criteria as EVAP. diagnosis

DIAGNOSTIC CHART

1. Normality judgment

Judge OK when the following criteria are satisfied.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 8 Limit of malfunction criteria as EVAP. diagnosis

DIAGNOSTIC CHART

Time Needed for Diagnosis: 65 - 514 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous drive cycles.

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

1. Memorize the freeze frame data. (For test mode $02)
2. Memorize the diagnostic value and trouble standard value. (For test mode $06)

Detect the open or short circuit of drain valve.

Judge NG when the ECM output level is different from the actual terminal level.

Identifying Evaporative Emission Control System Components. Scheme 64

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

PCV control: Open the PCV solenoid.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of drain valve.

Judge NG when the ECM output level is different from the actual terminal level.

Identifying Evaporative Emission Control System Components. Scheme 65

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

PCV control: Open the PCV solenoid.

Memorize the freeze frame data. (For test mode $02)

Detect the tank pressure sensor output property abnormality.

Judge NG when there is no pressure variation, which should exist in the tank, considering the engine status.

Identifying Connector, Terminal And Voltage Graph. Scheme 66

ENABLE CONDITION DESCRIPTION

1. Perform the diagnosis continuously in 60 seconds or more after starting the engine.
2. Be sure to check the fuel level and fuel temperature.

1. Abnormality Judgment

Judge NG when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

If the fuel level (Max. - Min.) in every 60 seconds is less than 2 l , extend 60 seconds more and make judgment with the Max. and Min. fuel level in 120 seconds.

If the difference did not appear though the time extended, extend the time (180,240, 300 seconds) and continue the judgment.

Diagnosis counter will count up when the difference of fuel level (Max. - Min.) is more than 2 l .

Time Needed for Diagnosis: 1 minute x 16 times or more

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous drive cycles.

1. Normality Judgment

Judge OK when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Purge control solenoid valve control: Purge fixation mode is prohibited.

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of the fuel tank pressure sensor.

Judge NG when out of the standard value.

Identifying Connector, Terminal And Voltage Graph. Scheme 67

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 15 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 15 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Purge control solenoid valve control: Purge fixation mode is prohibited.

Memorize the freeze frame data. (For test mode $02)

Detect the breaking/shortage of the fuel tank pressure sensor.

Judge NG when out of the standard value.

Identifying Connector, Terminal And Voltage Graph. Scheme 68

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously when purging.

1. Abnormality Judgment

Judge NG when the continuous time until completing the malfunction criteria below becomes more than 15 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 15 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK when the malfunction criteria below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

Purge control solenoid valve control: Purge fixation mode is prohibited.

Memorize the freeze frame data. (For test mode $02)

For detecting conditions, refer to DTC P0442 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK) , Diagnostic Trouble Code (DTC) Detecting Criteria.

For detecting conditions, refer to DTC P0442 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK) , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect open or short circuit of purge control solenoid valve.

Judge NG when ECM output level is different from actual terminal level.

Identifying Canister And Intake Manifold. Scheme 69

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis after starting the engine.

1. Abnormality Judgment

Judge NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

1. Normality Judgment

Judge OK and clear NG when the malfunction criterion below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect open or short circuit of purge control solenoid valve.

Judge NG when ECM output level is different from actual terminal level.

Identifying Canister And Intake Manifold. Scheme 70

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis after starting the engine.

1. Abnormality Judgment

Judge NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear NG when the malfunction criterion below is completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the malfunction of fuel level sensor output property.

Judge NG when the fuel level does not vary whereas it seemed to vary be in a usual driving speed.

Fuel Level And Resistance Graph. Scheme 71

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: To be determined.

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of fuel level sensor. Judge NG when out of the standard value.

Fuel Level Sensor Low Input Circuit Diagram. Scheme 72

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

1. When the OK idling cycle was completed 40 times in a row
2. When "Clear Memory" was performed

1. When the OK driving cycle was completed 3 times in a row
2. When "Clear Memory" was performed

None

Memorize the freeze frame data. (For test mode $02)

Detect the open or short circuit of fuel level sensor. Judge NG when out of the standard value.

Fuel Level Sensor High Input Circuit Diagram. Scheme 73

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 2.5 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

1. Normality Judgment