Diagnostic Trouble Code (DTC) Detecting Criteria (h4dotc) Subaru Impreza WRX GD/GG рестайлинг 2

LIST

LIST OF DIAGNOSTIC TROUBLE CODE

OUTLINE OF DIAGNOSIS

Detect the malfunction of AVCS system.

There are two types of diagnosis; crankshaft and camshaft position diagnosis and slow response diagnosis.

Perform one of two according to operation status.

Identifying Intake Camshaft Position Sensor Components. Scheme 102

ENABLE CONDITION

1. Crankshaft and camshaft position diagnosis CRANKSHAFT AND CAMSHAFT POSITION DIAGNOSIS Secondary Parameters Enable Conditions Battery voltage > or = 10.9 V Engine coolant temperature >60°C(140°F) Amount of target timing advance = 0°CA Engine speed > or = 500 rpm AVCS Not in operation
2. Slow response diagnosis CRANKSHAFT AND CAMSHAFT POSITION DIAGNOSIS Secondary Parameters Enable Conditions All the secondary parameters can be performed. More than 1 second Battery voltage > or = 10.9 V Engine coolant temperature > 60°C (140°F) Amount of AVCS target timing advance [ne] 0°CA Engine speed > or = 1,300 rpm AVCS In operation Variable amount of target timing advance < 1.07°CA

GENERAL DRIVING CYCLE

1. Crankshaft and camshaft position diagnosis Always perform the diagnosis continuously after starting the engine while the AVCS is not operated.
2. Slow response diagnosis Always perform the diagnosis continuously after starting the engine while the AVCS is operated.

DIAGNOSTIC METHOD

1. Crankshaft and camshaft position diagnosis Judge NG when standard amount of timing advance is outside of normal range, and judge OK when it is within normal range. Judge NG when the continuous time of completing the malfunction criteria below becomes more than 20 seconds, and judge OK and clear the NG when the continuous time of not completing the malfunction criteria below becomes more than 1 second. Judgment Value JUDGMENT VALUE REFERENCE CHART Malfunction Criteria Threshold Value Standard amount of timing advance >-13°CA or > 25°CA Time Needed for Diagnosis: 20 seconds Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
2. Slow response diagnosis Accumulate the AVCS deviation amount in positive and negative while AVCS is operated. Judge NG when cumulative value is large at interval of certain time (30 seconds).

1. Abnormality Judgment

Judge OK when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 30 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

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 driving 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 P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1)

Note. For the diagnostic procedure, refer to DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.

DTC P0018 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 2)

Note. For the diagnostic procedure, refer to DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.

DTC P0021 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 2)

Note. For the diagnostic procedure, refer to DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM 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 103

ENABLE CONDITION DESCRIPTION

Perform diagnosis continuously in 30 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. Correction when re-starting at high temperature: Normally minimum value 0.3 -+ 0
3. Purge control: Not allowed to purge

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

Detect the open or short circuit of front oxygen (A/F) sensor heater.

The front oxygen (A/F) sensor 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 Components. Scheme 104

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 activation judgment: Front oxygen (A/F) sensor full activation is not complete, or front oxygen (A/F) sensor half activation is not complete.
2. Front oxygen sensor main learning correction: Not allowed to calculate.
3. Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normally.
4. Purge control: Not allowed to purge.

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

Detect the open or short circuit of front oxygen (A/F) sensor heater.

The front oxygen (A/F) sensor 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.

Front Oxygen Sensor Voltage Cycles. Scheme 105

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 activation judgment: Front oxygen (A/F) sensor full activation is not complete, or front oxygen (A/F) sensor half activation is not complete.
2. Front oxygen sensor main learning correction: Not allowed to calculate.
3. Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normally.
4. Purge control: Not allowed to purge.

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

Detect open or short circuit of rear oxygen sensor heater.

Rear 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.

Rear Oxygen Sensor Heater Voltage Cycles. Scheme 106

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 rear oxygen heater.

Rear 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.

Identifying Rear Oxygen Heater And Voltage Graph. Scheme 107

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 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 Intake Manifold Pressure Sensor And Voltage Graph. Scheme 108

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 3 seconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 3 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.
3. Heavy fuel judgment: Not allowed to carry out the heavy judgment.
4. Fuel cut control: Not allowed to cut the over pressure charged fuel.

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

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 And Voltage Graph. Scheme 109

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 then 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

1. Air flow meter: Engine load is normally calculated by manifold pressure and engine speed; however, calculated only by manifold pressure.
2. EVAP cone, learning (fuel): Not allowed to learn.
3. Knock compensation: Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value. At normal: knock compensation = 0°CA is fixed. At trouble: knock compensation 0°CA is fixed. (Retard max. 12°CA at knock.) Not allowed to update the whole learning compensation factor. Not allowed to calculate the partial learning zone compensation value.
4. ISC control: Make the open loop compensation to be the given value (1 g/s). Stop calculating the throttle sensor temperature compensation. (Hold the previous value.)
5. Purge control: Not allowed to purge.

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 And Voltage Graph. Scheme 110

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. Air flow meter: Engine load is normally calculated by manifold pressure and engine speed; however, calculated only by manifold pressure.
2. EVAP cone, learning (fuel): Not allowed to learn.
3. Knock compensation: Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value. At normal: knock compensation = 0°CA is fixed. At trouble: knock compensation [ne] 0°CA is fixed. (Retard max. 12°CA at knock.) Not allowed to update the whole learning compensation factor. Not allowed to calculate the partial learning zone compensation value.
4. ISC control: Make the open loop compensation to be the given value (1 g/s). Stop calculating the throttle sensor temperature compensation. (Hold the previous value.)
5. Purge control: Not allowed to purge.

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 And Voltage Graph. Scheme 111

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

1. Air flow meter: Engine load is normally calculated by manifold pressure and engine speed; however, calculated only by manifold pressure.
2. EVAP cone, learning (fuel): Not allowed to learn.
3. Knock compensation: Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value. At normal: knock compensation = 0°CA is fixed. At trouble: knock compensation 0°CA is fixed. (Retard max. 12°CA at knock.) Not allowed to update the whole learning compensation factor. Not allowed to calculate the partial learning zone compensation value.
4. ISC control: Make the open loop compensation to be the given value (1 g (0.04 oz)/s). Stop calculating the throttle sensor temperature compensation. (Hold the previous value.)
5. Purge control: Not allowed to purge.

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 Intake Manifold Pressure Sensor And Voltage Graph. Scheme 112

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. Intake manifold pressure sensor process: Estimate the pressure from engine load.
2. ISC feedback: Not allowed to calculate the amount of feedback.
3. Heavy fuel judgment: Not allowed to carry out the heavy judgment.
4. Fuel cut control: Not allowed to cut the over pressure charged fuel.

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 Intake Manifold Pressure Sensor And Voltage Graph. Scheme 113

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. Intake manifold pressure sensor process: Estimate the pressure from engine load.
2. ISC feedback: Not allowed to calculate the amount of feedback.
3. Heavy fuel judgment: Not allowed to carry out the heavy judgment.
4. Fuel cut control: Not allowed to cut the over pressure charged fuel.

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 Intake Air Temperature Sensor And Graph. Scheme 114

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 Intake Air Temperature Sensor And Graph. Scheme 115

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 Intake Air Temperature Sensor And Graph. Scheme 116

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 Engine Coolant Temperature Sensor And Graph. Scheme 117

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 are in High driving.
7. Increase compensation factor at high engine coolant temperature: Increase normally occurs with high temperature and other conditions; however, occurs with other conditions except engine coolant temperature condition.
8. AVCS control: Make the oil flow control valve driving output to be Duty=0%.
9. 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 Engine Coolant Temperature Sensor And Graph. Scheme 118

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 are in High driving.
7. Increase compensation factor at high engine coolant temperature: Increase normally occurs with high temperature and other conditions; however, occurs with other conditions except engine coolant temperature condition.
8. AVCS control: Make the oil flow control valve driving output to be Duty=0%.
9. 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 119

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 120

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 Engine Coolant Temperature Sensor And Graph. Scheme 121

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.

TWCNT REFERENCE

Judgment value of timer after engine starting

t = 451.1 -25.9xTi

Ti is the lowest engine 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. 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 are in High driving.
7. Increase compensation factor at high engine coolant temperature: Increase normally occurs with high temperature and other conditions; however, occurs with other conditions except engine coolant temperature condition.
8. AVCS control: Make the oil flow control valve driving output to be Duty=0%.
9. Tumble generator valve control: Open the tumble generator valve.

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

Judge NG when the engine coolant temperature sensor output does not change.

Judge NG when the engine coolant temperature sensor output does not change though the vehicle is operated in a manner which is expected to affect the engine coolant temperature.

Identifying Engine Coolant Temperature Sensor And Graph. Scheme 122

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 75°C (167°F) and the difference is small before judging NG.

Identifying Coolant Thermostat Components. Scheme 123

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: 30 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

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.

Identifying O2 Sensor And Graph. Scheme 124

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 activation judgment: Front oxygen (A/F) sensor full activation is not complete, or front oxygen (A/F) sensor half activation is not complete.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normally.
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.

Identifying O2 Sensor And Graph. Scheme 125

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 activation judgment: Front oxygen (A/F) sensor full activation is not complete, or front oxygen (A/F) sensor half activation is not complete.
2. A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
3. Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normally.
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 Front Oxygen Sensor. Scheme 126

Identifying O2 Sensor And Graph. Scheme 127

ENABLE CONDITION DESCRIPTION

Perform diagnosis only once at a constant speed of 10 to 120 km/h (6 to 75 MPH) in 120 seconds after starting the engine.

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

After integrate 1,640 times (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. Correction when re-starting at high temperature: Normally minimum value 0.3 --> 0.
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.

Identifying O2 Sensor And Graph. Scheme 128

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 activation judgment: Front oxygen (A/F) sensor full activation is not complete, or front oxygen (A/F) sensor half activation is not complete.
2. Front oxygen sensor main learning correction: Not allowed to calculate.
3. Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normally.
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.

Identifying O2 Sensor And Graph. Scheme 129

ENABLE CONDITION (USED ONLY FOR MALFUNCTION JUDGMENT)

Abnormality Judgement

ENABLE CONDITION DESCRIPTION

Normality Judgement

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

TIME NEEDED FOR DIAGNOSIS

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 detecting 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.

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.

Identifying O2 Sensor And Graph. Scheme 130

ENABLE CONDITION DESCRIPTION

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

When the rear 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.

General Driving Cycle Diagnostic Method. Scheme 131

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: Once

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.

Judge OK when the following standards value 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

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.

General Driving Cycle Diagnostic Method. Scheme 132

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: Once

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 the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 200 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. 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 fuel system malfunction by the amount of main feedback control.

Identifying Fuel Line And Evaporation Fuel Line And Flow Diagram. Scheme 133

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

TIME NEEDED FOR DIAGNOSIS

Perform the diagnosis continuously at engine idle or constant vehicle speed after warm-up.

1. Abnormality Judgment

Judge that the fuel system malfunction occurs when the time during completing the malfunction criteria below continues 50 seconds or more by comparing the diagnosed value (fsobd) with threshold value.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 4 Threshold value for fuel system malfunction criteria

THRESHOLD VALUE FOR FUEL SYSTEM MALFUNCTION CRITERIA

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 malfunction criteria below are continued for 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

Rich side malfunction

1. Purge control solenoid valve control: Not allowed to purge.
2. Heavy fuel judgment control: Not allowed to carry out the heavy judgment.

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

Identifying Fuel Line And Evaporation Fuel Line And Flow Diagram. Scheme 134

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

THRESHOLD VALUE FOR FUEL SYSTEM MALFUNCTION CRITERIA

Perform the diagnosis continuously at engine idle or constant vehicle speed after warm-up.

1. Abnormality Judgment

Judge that the fuel system malfunction occurs when the time during completing the malfunction criteria below continues 50 seconds or more by comparing the diagnosed value (fsobd) with threshold value.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 4 Threshold value for fuel system malfunction criteria

THRESHOLD VALUE FOR FUEL SYSTEM MALFUNCTION CRITERIA

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 malfunction criteria below are continued for 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

Rich side malfunction

1. Purge control solenoid valve control: Not allowed to purge.
2. Heavy fuel judgment control: Not allowed to carry out the heavy judgment.

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.

Identifying Fuel Temperature Sensor And Graph. Scheme 135

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

Always perform 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 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.

Identifying Fuel Temperature Sensor And Graph. Scheme 136

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.

Identifying Fuel Temperature Sensor And Graph. Scheme 137

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 throttle position sensor 2. Judge NG when out of the standard value.

Throttle/Pedal Position Sensor/Switch Circuit Diagram. Scheme 138

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 Circuit Diagram. Scheme 139

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 fuel pump control unit. Judge NG when the NG signal is sent through a diagnostic line coming from the fuel pump control unit. Fuel pump control unit detects the open or short circuit malfunction for each line, and then sends NG signals if one of them is found NG.

Fuel Pump Primary Circuit Diagram. Scheme 140

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

OFF setting may be needed depending on the NG portion.

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

Detect the malfunction of wastegate control solenoid valve function. Judge NG when becoming high waste-gate pressure.

Identifying Turbo/Super Charger Wastegate Solenoid Valve Coil. Scheme 141

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

Map 10

ATMOSPHERIC PRESSURE SPECIFICATIONS

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 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 wastegate control solenoid valve. Judge NG when the terminal output voltage remains Low during outputting the duty signal.

Identifying Turbo/Super Charger Wastegate Solenoid Valve Coil. Scheme 142

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously after engine starts.

1. Abnormality Judgment

Judge NG when the continuous time until completing the malfunction criteria below becomes more than 655 milliseconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 655 milliseconds

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 wastegate control solenoid valve. Judge NG when the terminal output voltage remains Low or High during outputting the duty signal.

Identifying Turbo/Super Charger Wastegate Solenoid Valve Coil. Scheme 143

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously after engine starts.

1. Abnormality Judgment

Judge NG when the continuous time until completing the malfunction criteria below becomes more than 655 milliseconds.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 655 milliseconds

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

1. Normality Judgment

Judge OK and clear NG when a 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 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. 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) Every time misfire: FTP 1.5 times misfire, Catalyst damage misfire
3. 360° Interval Difference Method

ENABLE CONDITION DESCRIPTION

Map3

MT model

Vehicle Speed < 64.4 km/h (40 MPH)

VEHICLE SPEED SPECIFICATIONS

Vehicle Speed > or = 64.4 km/h (40 MPH)

VEHICLE SPEED SPECIFICATIONS

AT model

VEHICLE SPEED SPECIFICATIONS

1. Detecting misfire is able to be carried out in the condition between idling and high revolution.
2. Perform the diagnosis continuously.

Diagnosis Circuit For General Driving Cycle. Scheme 144

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.

DIAGNOSTIC METHOD

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.

Ignition Order And Crankshaft Position Speed Reference Steps. Scheme 145

1. 180° Interval Difference Method

INTERVAL DIFFERENCE METHOD

180° Interval Difference Method For Judgment Values. Scheme 146

1. 360° Interval Difference Method

INTERVAL DIFFERENCE METHOD

360° Interval Difference Method For Judgment Values. Scheme 147

1. 720° Interval Difference Method

INTERVAL DIFFERENCE METHOD

720° Interval Difference Method For Judgment Values. Scheme 148

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 VALUES REFERENCE

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 VALUES REFERENCE

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

Catalyst Damage Misfire Judgment Values Reference Chart. Scheme 149

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 150

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

Knock compensation

1. Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value.
2. At normal: knock compensation = 0°CA is fixed.
3. At trouble: knock compensation = -5°CA. (Retard 5°CA.)
4. Not allowed to update the whole learning compensation factor.
5. Not allowed to calculate the partial learning zone compensation value.

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 151

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

Knock compensation

1. Knock compensation final timing advance and retard value = knock compensation + whole learning compensation value + partial learning compensation value.
2. At normal: knock compensation = 0°CA is fixed.
3. At trouble: knock compensation = -5°CA. (Retard 5°CA.)
4. Not allowed to update the whole learning compensation factor.
5. Not allowed to calculate the partial learning zone compensation value.

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.

Knock Compensation Reference. Scheme 152

Identifying Crankshaft Position Sensor And Signals Reference. Scheme 153

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 continuous time of completing the malfunction criteria below becomes more than 3 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 crankshaft position sensor output property. Judge NG when the number of crankshaft signal every 1 revolution becomes abnormal.

Knock Compensation Reference. Scheme 154

Identifying Crankshaft Position Sensor And Signals Reference. Scheme 155

ENABLE CONDITION DESCRIPTION

Perform the diagnosis continuously under 3,000 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.

Knock Compensation Reference. Scheme 156

ENABLE CONDITION DESCRIPTION

Always perform the diagnosis continuously.

1. Abnormality Judgment

The camshaft signal normally enters three times by two rev. of engine speed; however, judge NG when the camshaft signal does not enter three times continuously.

Judge NG when the malfunction criteria below are completed more than 100 rev. of engine speed. Judge OK and clear NG when the malfunction criteria below are not completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Time Needed for Diagnosis: 100 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

1. Ignition timing whole learning compensation: Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole learning compensation factor when IG OFF, and then make the whole learning incomplete. Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole learning compensation factor when making a normality judgment from abnormality judgment, and then make the whole learning incomplete.
2. Ignition timing partial learning compensation: Enter the initial value (0°CA) to the compensation value of partial learning zone when IG OFF. Enter the initial value (0°CA) to the compensation value of partial learning zone when making a normality judgment from abnormality judgment.
3. AVCS control: Most timing retard learning is not complete or most timing retard learning completion is not experienced. ISC feedback compensation: Do not perform the AVCS actual timing advance compensation. Make the OCV driving Duty to be the given value (9.36%).

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

DTC P0345 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 2)

Note. For diagnostic procedure, refer to DTC P0340 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 1 OR SINGLE SENSOR) , Diagnostic Trouble Code (DTC) Detecting Criteria.

Detect leakage or blocking of secondary air injection system.

When the secondary air injection system is operated (pump is ON, right and left combo valves are open), close right and left combo valves, and detect NG by the secondary air supply pipe pressure and flow amount of secondary air pipe.

ENABLE CONDITION DESCRIPTION

Perform the diagnosis when the secondary air pump is operated.

When the secondary air injection system is operated (pump is operated, right and left combo valves are open), close right and left combo valves respectively as following, and measure the secondary air supply pipe pressure and flow amount of secondary air pipe. Detect NG by 2 methods of pump supply pressure check and flow amount check.

Pump supply pressure check

Judge NG for the pump supply pressure when secondary air supply pipe pressure is lower than ambient pressure and judge OK when it is higher, when the secondary air pump is ON.

Flow amount check

When the secondary air injection system is operated (pump is operated, right and left combo valves are open), close right combo valve --> close left combo valve --> open right combo valve --> open left combo valve, measure each secondary air supply pipe pressure (PSL, P0, PSR) and calculate the flow amount of secondary air pipe by these measurements. Detect NG according to flow amount of secondary air pipe.

Judgment Values For Flow Amount. Scheme 157

Judgment Value

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

Pump supply pressure check

JUDGMENT VALUE REFERENCE CHART

Map14

AIR SUPPLY PIPE PRESSURE SPECIFICATIONS

Flow amount check

FLOW AMOUNT SPECIFICATIONS

Map 15, Map 16

PRESSURE SPECIFICATIONS

Map 18

PRESSURE SPECIFICATIONS

Map 19, Map 20

PRESSURE SPECIFICATIONS

Time Needed for Diagnosis: 7 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)

DTC P0411 SECONDARY AIR INJECTION SYSTEM INCORRECT FLOW DETECTED

Note. For the diagnostic procedure, refer to DTC P0410 SECONDARY AIR INJECTION SYSTEM , Diagnostic Trouble Code (DTC) Detecting Criteria.

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

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.

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)

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

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.

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)

DTC P0416 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "B" CIRCUIT OPEN

Note. For the diagnostic procedure, refer to DTC P0413 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "A" CIRCUIT OPEN , Diagnostic Trouble Code (DTC) Detecting Criteria.

DTC P0417 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "B" CIRCUIT SHORTED

Note. For the diagnostic procedure, refer to DTC P0414 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "A" CIRCUIT SHORTED , Diagnostic Trouble Code (DTC) Detecting Criteria.

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

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.

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 deterioration of catalyst function.

Though the rear 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 rear oxygen sensor output and comparing it with the front A/F sensor output.

Identifying Catalyst System Components. Scheme 158

ENABLE CONDITION DESCRIPTION

1. Map 2

Add the following value every 512 milliseconds.

Catalyst warm-up counter < or = 9,000

PURGE EXECUTION CUMULATIVE TIME

Catalyst warm-up counter > 9,000

Catalyst

Perform the diagnosis once at the constant vehicle speed of 75 km/h (47 MPH) or more after warming up the engine.

After the malfunction criteria are completed, calculate the output fluctuation value of front oxygen (A/F) sensor and output fluctuation value of rear oxygen sensor.

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

Regard the A/F response properties and diagnosis value as parameters for judgment 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: 33 - 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.

Fuel Flow Diagram. Scheme 159

In this system diagnosis, filter tank pressure is changed. And leakage and normality & abnormality of valve operation are judged by monitoring the pressure change status using the fuel tank pressure sensor. The diagnosis is performed for 0.04-inch diagnosis in the order of Mode A, Mode B, Mode C and Mode D. For 0.02-inch diagnosis, perform in the order of Mode Y, Mode A, Mode B, Mode C and Mode D.

0.04-inch Diagnosis

0.04-Inch Diagnosis Mode Description Chart. Scheme 160

DIAGNOSIS MODE DESCRIPTION CHART

Mode table for Evaporative Emission Control System diagnosis

MODE CHART FOR EVAPORATIVE EMISSION CONTROL SYSTEM DIAGNOSIS

0.02-inch Diagnosis

0.02-Inch Diagnosis Mode Description Chart. Scheme 161

DIAGNOSIS MODE DESCRIPTION CHART

COMPONENT DESCRIPTION

1. Pressure Control Solenoid Valve

Pressure control solenoid valve maintains the fuel tank pressure equal to the atmospheric air pressure. Normally, the solenoid is set to OFF, and the valve mechanically opens and closes in accordance with the difference between the tank pressure and atmospheric air pressure, and the tank pressure and canister pressure.

The solenoid which is set to ON forces to open the valve.

Identifying Pressure Control Solenoid Valve Components. Scheme 162

1. Valve Operation and Air Flow

As in the X parts below, there are the area with atmospheric air pressure above the diaphragm and the area with tank pressure below the diaphragm. Also, as in the Y parts below, there are the area with tank pressure above the diaphragm and the area with canister pressure below the diaphragm. In the table below the air flow from each port in accordance with pressure difference is shown with the atmospheric air pressure port A, tank pressure port B and canister pressure port C.

Valve Operation And Air Flow. Scheme 163

PRESSURE STATUS AND AIR FLOW SPECIFICATIONS

When A < B (Solenoid OFF)

Valve Operation And Air Flow When A < B (Solenoid OFF). Scheme 164

When B < C (Solenoid OFF)

Valve Operation And Air Flow When B < C (Solenoid OFF). Scheme 165

When solenoid is ON

Valve Operation And Air Flow When Solenoid Is ON. Scheme 166

1. Drain valve

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

Valve Operation And Air Flow For Drain Valve. Scheme 167

0.04-inch Diagnosis

ENABLE CONDITION DESCRIPTION

0.02-inch Diagnosis

ENABLE CONDITION DESCRIPTION

Map

PRESSURE SPECIFICATIONS

0.04-inch Diagnosis

1. Perform the diagnosis only once in more than 856 seconds after the engine start at the constant driving speed of 32 km/h (19.9 MPH) or more.
2. Pay attention to the fuel temperature and fuel level.

0.02-inch Diagnosis

1. 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.
2. If not judged OK or NG, repeat the diagnosis.
3. Pay attention to the fuel level.

1. Diagnosing Function of Purge Control Solenoid Valve

DTC

P0457 Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off)

Purpose of Mode Z

When performing the leakage diagnosis of EVAP system, purge control solenoid valve have to operate normally. Therefore, mode Z is used to diagnose the purge control solenoid valve open fixation.

If purge control solenoid valve open fixation trouble is detected, the evaporation system leakage diagnosis is cancelled.

1. Diagnosing function of purge control solenoid valve [P0457]

Purge control solenoid valve 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 168

1. Normal (Scheme 168): Malfunction Criteria And Threshold Value Reference

Judge normal when the following conditions are completed at once.

1. evptez - evptezha < or = 0.4 kPa (3.0 mmHg, 0.12 inHg)
2. evptezini - evptezha < or = 0.71 kPa (5.3 mmHg, 0.21 inHg)

Abnormality Judgment

If OK judgment cannot be made, extend Mode Z 16 seconds more, and judge NG when all 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 169

1. Purge control solenoid valve open fixation (Scheme 169): Purge Control Solenoid Valve Open Fixation Reference

1. evptezini, evptez < or = 1.43 kPa (10.7 mmHg, 0.42 inHg)
2. evptez - evptezha < or = 0.87 kPa (6.5 mmHg, 0.26 inHg)
3. evptezini - evptezha < or = 0.87 kPa (6.5 mmHg, 0.26 inHg)
4. No fuel rolling of above 2 l (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)

Diagnostic method

1. 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.
2. This diagnostic method consists of 5 steps.

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 and judge as large leak (10 or 25 seconds).

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.

PRESSURE SPECIFICATIONS

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.

1. After Mode D

Assigning P1 and P2, which are tank variations measured in Mode A and Mode B, 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.

Abnormality Judgment

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

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 7 Limit of malfunction criteria as EVAP. diagnosis.

LIMIT OF MALFUNCTION CRITERIA

Time Needed for Diagnosis: 30 - 100 seconds

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

Leak diagnosis

DTC

P0456 Evaporative Emission Control System (Very Small Leak)

1. Diagnostic method
2. 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.
3. This diagnostic method consists of 5 steps.

Mode A: (0 point correction)

Wait until the tank pressure returns to 0 point (around 0 mmHg) when the tank pressure is high. Change to Mode B when the tank pressure becomes 0. Cancel the diagnosis when the tank pressure does not return to 0 point in spite of spending the specified time.

Mode B: (Introduce negative pressure)

Introduce the intake manifold negative pressure to fuel tank.

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

Change to Mode C when the tank pressure becomes the pressure (desired negative pressure) above. Cancel the diagnosis when the tank pressure does not become the value above.

Mode C: (Hold negative pressure)

Stop introducing the negative pressure and wait 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)

Monitor the tank pressure on Mode D, and calculate the tank pressure variation (P2) and time until it returns to the end level of P2 (evpdset). When it returns, change to Mode E. Make advanced OK judgment or cancel depending on the P2 level, when it doesn't return in spite of spending the specified time.

Normality Judgment

Judge OK when the criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Mode E: (Calculation of evaporation gas yield)

Calculate the tank pressure variation P1 in time evpdset, judge NG/OK from P1 value. (Gray judgment possible)

Abnormal judgment

Judge NG when the criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 7 Limit of malfunction criteria as EVAP. diagnosis

LIMIT OF MALFUNCTION CRITERIA

Normality Judgment

Judge OK when all the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE REFERENCE CHART

Map 8

THRESHOLD VALUE

Time Needed for Diagnosis: 65 - 516 seconds

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 170

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