DIAGNOSTIC METHOD
- When the conditions during which the differences of AVCS target timing advance amount and AVCS actual timing advance amount is large continues for certain amount of time.
- When the differences of target timing advance amount and actual timing advance amount is calculated during AVCS control, and the difference per predetermined time is the specified value or larger.
- Abnormality Judgement
Judge as NG when the following conditions are established within the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sum(Target position - Actual position) | 8000 °CA (Bank 1) |
| 8000 °CA (Bank 2) | |
| Or | |
| Sum(Target position - Actual position) | < -8000 °CA (Bank 1) |
| < -8000 °CA (Bank 2) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 30000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the following conditions are established within the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sum(Target position - Actual position) | < or = 8000 °CA (Bank 1) |
| < or = 8000 °CA (Bank 2) | |
| And | |
| > or = -8000 °CA (Bank 1) | |
| > or = -8000 °CA (Bank 2) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 30000 ms
Detect the AVCS system malfunction.
Judge as NG when the timing advance is outside the normal range.
Scheme 179
Judge as NG when the camshaft sensor input position is not within the normal range.
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Crankshaft position when camshaft position sensor signal is input | < BTDC 17 °CA (Bank 1) |
| < BTDC 17 °CA (Bank 2) | |
| Or | |
| BTDC 55 °CA (Bank 1) | |
| BTDC 55 °CA (Bank 2) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 20000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Crankshaft position when camshaft position sensor signal is input | > or = BTDC 17 °CA (Bank 1) |
| > or = BTDC 17 °CA (Bank 2) | |
| And | |
| < or = BTDC 55 °CA (Bank 1) | |
| < or = BTDC 55 °CA (Bank 2) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 1000 ms
Note. For the detection standard, refer to DTC P0016. Refer to DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.
Note. For the detection standard, refer to DTC P0011. Refer to DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria.
Detect functional errors of the front oxygen (A/F) sensor heater.
Judge as NG when it is determined that the front oxygen (A/F) sensor impedance is large when looking at engine status such as deceleration fuel cut.
Scheme 180
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Front oxygen (A/F) sensor impedance | 50 ohms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 10000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Front oxygen (A/F) sensor impedance | < or = 50 ohms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 10000 ms
Detect front oxygen (A/F) sensor heater open or short circuit.
The front oxygen (A/F) sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the output terminal voltage at OFF is the battery voltage.
Judge as NG when the terminal voltage remains Low.
Scheme 181
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | Low |
| Front oxygen (A/F) sensor heater control duty | < 87.5 % |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 4 ms x 250 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | High |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect front oxygen (A/F) sensor heater open or short circuit.
The front oxygen (A/F) sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the output terminal voltage at OFF is the battery voltage.
Judge as NG when the terminal voltage remains High.
Scheme 182
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | High |
| Front oxygen (A/F) sensor heater control duty | > or = 12.5 % |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 4 ms x 500 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | Low |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the rear oxygen sensor heater open or short circuit.
The rear oxygen sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the output terminal voltage at OFF is the battery voltage.
Judge as NG when the terminal voltage remains Low.
Scheme 183
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | Low |
| Rear oxygen sensor heater control duty | < 75 % |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 8 ms x 320 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | High |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the rear oxygen sensor heater open or short circuit.
The rear oxygen sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the output terminal voltage at OFF is the battery voltage.
Judge as NG when the terminal voltage remains High.
Scheme 184
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | High |
| Rear oxygen sensor heater control duty | > or = 25 % |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 8 ms x 320 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage level | Low |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect problems in the intake manifold pressure sensor output properties.
Judge as 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.
Scheme 185
- Abnormality Judgement
Judge as NG when Low side or High side becomes NG.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Engine speed | < 2500 RPM |
| Throttle position | > or = 10° |
| Output voltage | < 1 V |
| Engine load | 1.356 g/rev (0.05 oz/rev) |
| High | |
| Engine speed | 600 RPM - 900 RPM |
| Throttle position | < 2.75 ° |
| Output voltage | > or = 2.36 V |
| Engine load | < 0.4 g/rev (0.01 oz/rev) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Low side: 3000 ms
High side: 3000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG when both Low side and High side become OK.
If the duration of time while the following conditions are met is longer than the time indicated, judge as OK.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Engine speed | < 2500 RPM |
| Throttle position | > or = 10° |
| Output voltage | > or = 1 V |
| Engine load | 1.356 g/rev (0.05 oz/rev) |
| High | |
| Engine speed | 600 RPM - 900 RPM |
| Throttle position | < 2.75 ° |
| Output voltage | < 2.36 V |
| Engine load | < 0.4 g/rev (0.01 oz/rev) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Low side: Less than 1 second
High side: Less than 1 second
Detect the malfunction of air flow sensor output properties.
Judge as a low side NG when the air flow voltage indicates a small value regardless of running in a state where the airflow voltage increases. Judge as a high side NG when the airflow voltage indicates a large value regardless of running in a state where the air flow voltage decreases. Judge air flow sensor property NG when the Low side or High side becomes NG.
Scheme 186
- Abnormality Judgement
Judge as NG when Low side or High side becomes NG.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Output voltage | < 1.5 V |
| Engine speed | > or = 2500 RPM |
| Throttle opening angle | > or = 15° |
| Intake manifold pressure | > or = 53.3 kPa (400 mmHg, 15.7 inHg) |
| High (1) | |
| Output voltage | > or = 1.95 V |
| Engine speed | 600 RPM - 900 RPM |
| Throttle opening angle | < 4.1 ° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| High (2) | |
| Output voltage | > or = 1.70 V |
| Engine speed | 600 RPM - 900 RPM |
| Throttle opening angle | < 4.1 ° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| Fuel system diagnosis | Rich side malfunction |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Low: 3000 ms
High: 10000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG when both Low side and High side become OK.
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Low | |
| Output voltage | > or = 1.5 V |
| Engine speed | 2500 RPM |
| Throttle opening angle | > or = 15° |
| Intake manifold pressure | > or = 53.3 kPa (400 mmHg, 15.7 inHg) |
| High | |
| Output voltage | < 1.95 V |
| Engine speed | 600 RPM - 900 RPM |
| Throttle opening angle | < 4.1 ° |
| Intake manifold pressure | < 52.7 kPa (395 mmHg, 15.6 inHg) |
| Fuel system diagnosis | Rich side normal |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Low: Less than 1 second
High: Less than 1 second
Detect open or short circuits of the air flow sensor.
Judge as NG if out of specification.
Scheme 187
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < or = 0.22 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | 0.22 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect open or short circuits of the air flow sensor.
Judge as NG if out of specification.
Scheme 188
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 4.98 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 4.98 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of intake manifold pressure sensor.
Judge as NG if out of specification.
Scheme 189
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < or = 0.573 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | 0.573 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of intake manifold pressure sensor.
Judge as NG if out of specification.
Scheme 190
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 4.596499186 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 4.596499186 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the malfunction of intake air temperature sensor output property.
Judge as NG when the intake air temperature is not varied whereas it seemed to be varied from the viewpoint of engine condition.
Scheme 191
- Abnormality Judgement
Judge as NG when the following conditions are established.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage difference between Max. and Min. | < 0.02 V(Equivalent to approximately 0.5°C (0.9°F) near 25°C) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage difference between Max. and Min. | > or = 0.02 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect open or short circuit of the intake air temperature sensor.
Judge as NG if out of specification.
Scheme 192
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 0.230975449 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 0.230975449 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect open or short circuit of the intake air temperature sensor.
Judge as NG if out of specification.
Scheme 193
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 4.716 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 4.716 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of the engine coolant temperature sensor.
Judge as NG if out of specification.
Scheme 194
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 0.264738528 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 0.264738528 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of the engine coolant temperature sensor.
Judge as NG if out of specification.
Scheme 195
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | > or = 4.716 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Output voltage | < 4.716 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of throttle position sensor 1.
Judge as NG if out of specification.
Scheme 196
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sensor 1 input voltage | < or = 0.217 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 24 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sensor 1 input voltage | 0.217 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 24 ms
Detect the open or short circuit of throttle position sensor 1.
Judge as NG if out of specification.
Scheme 197
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sensor 1 input voltage | > or = 4.858 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 24 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Sensor 1 input voltage | < 4.858 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 24 ms
Detect the malfunction of engine coolant temperature output property.
Judge as NG when the engine coolant temperature does not rise in driving conditions where it should.
Scheme 198
- Abnormality Judgement
Judge as NG if the criteria below are met.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature | < 20 °C (68 °F) |
| Timer for diagnosis after engine start | > or = Judgement value of timer after engine start |
JUDGEMENT VALUE REFERENCE
Timer for diagnosis after engine start
- Timer stop at fuel cut
- During the driving conditions except a) above, timer counts up as follows.
64 milliseconds + TWCNT milliseconds (at the time of 64 milliseconds)
TWCNT is defined as follows
TWCNT = 0 at idle switch ON
TWCNT show on the following table at idle switch OFF.
| Vehicle speed km/h (MPH) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 (0) | 8 (5) | 16 (9.9) | 24 (14.9) | 32 (19.9) | 40 (24.9) | 48 (29.8) | 56 (34.8) | ||
| Temperature °C (°F) | 20 (-4) | 0 ms | 37.136 ms | 74.272 ms | 111.41 ms | 126.66 ms | 141.91 ms | 163.59 ms | 185.26 ms |
| 10 (14) | 0 ms | 27.391 ms | 54.782 ms | 82.173 ms | 99.65 ms | 117.13 ms | 135.96 ms | 154.8 ms | |
| 0 (32) | 0 ms | 17.646 ms | 35.292 ms | 52.938 ms | 72.64 ms | 92.341 ms | 108.34 ms | 124.33 ms | |
| 10 (50) | 0 ms | 7.9012 ms | 15.802 ms | 23.704 ms | 45.63 ms | 67.556 ms | 80.711 ms | 93.867 ms | |
| 20 (68) | 0 ms | 7.9012 ms | 15.802 ms | 23.704 ms | 45.63 ms | 67.556 ms | 80.711 ms | 93.867 ms | |
VEHICLE SPEED SPECIFICATION
Judgement value of timer after engine starting
t = 451056 ms - 25870 ms x Ti
Ti: The lowest coolant temperature after engine start
Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature | > or = 20 °C (68 °F) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the malfunction of the engine coolant temperature sensor characteristics.
Memorize the engine coolant temperature and fuel temperature at the last engine stop, and use them to judge as NG when the engine coolant temperature does not decrease when it should.
Scheme 199
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature at the last engine stop - Minimum engine coolant temperature after the engine start | < 2.5 °C (36.5 °F) |
| Fuel temperature at the last engine stop - Fuel temperature | > or = 5 °C (41 °F) |
| Intake air temperature - Fuel temperature | < 2.5 °C (36.5 °F) |
| Fuel temperature | < 35 °C (95 °F) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 2500 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature at the last engine stop - Minimum engine coolant temperature after the engine start | > or = 2.5 °C (36.5 °F) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect malfunctions of the thermostat function.
Judge as NG when the engine coolant temperature is lower than the estimated engine coolant temperature and the difference between them is large. Judge as OK when the engine coolant temperature becomes to 75°C (167°F), and the difference is small, before judging NG.
Scheme 200
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Battery voltage | > or = 10.9 V |
| Estimate ambient temperature | > or = -7°C (19.4°F) |
| Thermostat malfunction diagnosis | Incomplete |
| Engine coolant temperature at engine starting | < 55°C (131 °F) |
| Estimated coolant temperature | > or = 70°C (158°F) |
| Engine coolant temperature | < or = 70°C (158°F) |
| (Estimated - measured) Engine coolant temperature | 30 °C (86 °F) |
| Vehicle speed | > or = 30 km/h (18.6 MPH) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 64 ms x 3 time(s) x 152 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Battery voltage | > or = 10.9 V |
| Estimate ambient temperature | > or = -7°C (19.4°F) |
| Thermostat malfunction diagnosis | Incomplete |
| Engine coolant temperature at engine starting | < 55°C (131 °F) |
| Engine coolant temperature | > or = 70°C (158°F) |
| (Estimated - measured) Engine coolant temperature | < or = 30 °C (86 °F) |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of sensor.
Judge as NG, when the element voltage is out of the specified range.
Scheme 201
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Input voltage (+) | < 1.128 V |
| Or | |
| Input voltage (-) | < 0.23 V |
| Or | |
| Input voltage (+) - Input voltage (-) | < 0.644 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Input voltage (+): 1000 ms
Input voltage (-): 1000 ms
Input voltage (+) - Input voltage (-)|: 1000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Input voltage (+) | > or = 1.128 V |
| Input voltage (-) | > or = 0.23 V |
| Input voltage (+) - Input voltage (-) | > or = 0.644 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the open or short circuit of sensor.
Judge as NG, when the element voltage is out of the specified range.
Scheme 202
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Input voltage (+) | 3.589 V |
| Or | |
| Input voltage (-) | 3.541 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
Input voltage (+): 1000 ms
Input voltage (-): 1000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Input voltage (+) | < or = 3.589 V |
| Input voltage (-) | > or = 3.541 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect the slow response of front oxygen (A/F) sensor.
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 sensor cover holes are clogged, the rich to lean judgement in the ECM is delayed when the actual change from rich to lean occurs.
Judge as NG when the actual movement in comparison to the ECM control amount is slow.
Scheme 203
Scheme 204
Calculate faf difference every 32 ms x 4, and the lambda value difference. Calculate the diagnosis value after calculating 820 time(s).
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Parafca = td2faf/td2lmd | 0.22 |
| Where | |
| Td2faf (N) = td2faf (n-1) + |d2faf (n) | |
| Td2lmd (N) = td2lmd (n-1) + |d2lmd (n) | |
| Add up to 32 ms x 4 x 820 time(s). | |
| D2faf (n) = (faf (n) - faf (n-1)) - (faf (n-1) - faf (n-2)) | |
| D2lmd (n) = (lmd (n) - lmd (n-1)) - (lmd (n-1) - lmd (n-2)) | |
| Faf = main feedback compensation coefficient every 128 milliseconds | |
| Lmd = output lambda every 128 milliseconds |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 32 ms x 4 x 820 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Parafca = td2faf/td2lmd | < or = 0.22 |
| Where | |
| Td2faf (N) = td2faf (n-1) + |d2faf (n) | |
| Td2lmd (N) = td2lmd (n-1) + |d2lmd (n) | |
| Add up to 32 ms x 4 x 820 time(s). | |
| D2faf (n) = (faf (n) - faf (n-1)) - (faf (n-1) - faf (n-2)) | |
| D2lmd (n) = (lmd (n) - lmd (n-1)) - (lmd (n-1) - lmd (n-2)) | |
| Faf = main feedback compensation coefficient every 128 milliseconds | |
| Lmd = output lambda every 128 milliseconds |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 32 ms x 4 x 820 time(s)
Detect open circuits of the sensor.
Judge as NG when the impedance of the element is large.
Scheme 205
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Battery voltage | > or = 10.9 V |
| Time of heater control duty at 70 % or more | > or = 36000 ms |
| Front oxygen (A/F) sensor impedance. | 500 ohms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 5000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Battery voltage | > or = 10.9 V |
| Front oxygen (A/F) sensor impedance. | < or = 500 ohms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect continuity NG of the oxygen sensor. If the oxygen sensor voltage reading is not within the probable range considering the operating conditions, judge as NG.
Scheme 206
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| High | P0138 | |
| Sensor output voltage | 1.2 V | |
| Low | P0137 | |
| Sensor output voltage | < 0.03 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
High: 2500 ms
Low (1): 20000 ms
Low (2): 150000 ms
Low (3): Value from Map
Map
| Fuel Cut Time (second) | 0 | 2000 | 10000 |
|---|---|---|---|
| Time Needed for Diagnosis (second) | 150000 | 150000 | 150000 |
MAP SPECIFICATION
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| High | P0138 | |
| Sensor output voltage | < or = 1.2 V | |
| Low | P0137 | |
| Sensor output voltage | > or = 0.03 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis
High: Less than 1 second
Low (1): Less than 1 second
Low (2): Less than 1 second
Low (3): Less than 1 second
Note. For the detection standard, refer to DTC P0137. Refer to DTC P0137 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2) , Diagnostic Trouble Code (DTC) Detecting Criteria.
Detect the slow response of the oxygen sensor.
Judge as NG if either of the rich to lean response diagnosis or lean to rich response diagnosis is NG, and Judge as OK if both are OK.
[Rich --> lean diagnosis response]
- Measure the response time for oxygen sensor output changes when the A/F ratio changes to rich to lean. If the measured response time is larger than the threshold value, it is NG. If it is smaller, it is OK.
- Judge as NG when the oxygen sensor voltage is large (rich) when recovering from a deceleration fuel cut.
[Lean --> rich diagnosis response]
- Measure the response time for oxygen sensor output changes when the A/F ratio changes to lean to rich. If the measured response time is larger than the threshold value, it is NG.
- Judge as NG when the oxygen sensor voltage remains small when recovering from a deceleration fuel cut.
Measure the response time of the output change of the oxygen sensor when the A/F ratio changes to rich to lean. And Judge as NG when the measured response time is larger than the threshold value.
Scheme 207
When the oxygen sensor output voltage changes from 0.55 V (rich) to 0.15 V (lean), calculate the minimum response time for output change between 0.5 V and 0.2 V for the judgement criteria.
Scheme 208
- Abnormality Judgement
- Judge as NG when the judgement value is larger than the threshold value after deceleration fuel cut. Response time (diagnosis value) Threshold value --> abnormal NOTE: Variation time of rear oxygen sensor output voltage is short during fuel cut in deceleration. NG judgement should be performed after deceleration fuel cut. Even without deceleration fuel cut, judge as OK if the value is below the threshold. When the deceleration fuel cut time is 5000 ms or more, judge as NG if the following criteria are met 2000 ms after recovering from the deceleration fuel cut.
- Judge as NG when the oxygen sensor voltage at recovery from a deceleration fuel cut is large.
If the fuel cut time in a deceleration fuel cut is long (5000 ms or more), and even after recovering from a deceleration fuel cut, the oxygen sensor voltage is high (0.55 V or more), judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Shortest time change from rich (0.5 V O 2 output) to lean (0.2 V) when voltage reduces from 0.55 V to 0.15 V | 837 ms |
| Or | |
| Longest time over 0.55 V | > or = 2000 ms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 1 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
- Regardless of a deceleration fuel cut, if the response time (diagnosis value) when the oxygen sensor voltage has changed from rich to lean is shorter than the threshold value (judgement value), judge as a normal condition. Response time (diagnosis value) < or = threshold value --> normal
- Do not judge as a normal condition.
Judge as OK and clear the NG if the following conditions are established.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Shortest time change from rich (0.5 V O 2 output) to lean (0.2 V) when voltage reduces from 0.55 V to 0.15 V | < or = 837 ms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 1 time(s)
When the oxygen sensor output voltage changes from 0.25 V (lean) to 0.55 V (rich), calculate the minimum response time for output change between 0.3 V and 0.5 V for the judgement criteria.
Scheme 209
- Abnormality Judgement
- Judge as NG when the judgement value is larger than the threshold value after deceleration fuel cut. Response time (diagnosis value) Threshold value --> abnormal
- If the oxygen sensor voltage is small after recovering from a deceleration fuel cut, and remains small, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Shortest time change from lean (0.3 V O 2 output) to rich (0.5 V) when voltage changes from 0.25 V to 0.55 V | 4000 ms |
| Or | |
| Longest time under 0.25 V | > or = 120000 ms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 1 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
- Regardless of a deceleration fuel cut, if the response time (diagnosis value) when the oxygen sensor voltage has changed from rich to lean is shorter than the threshold value (judgement value), judge as a normal condition. Response time (diagnosis value) < or = threshold value --> normal
- Do not judge as a normal condition.
Judge as OK and clear the NG if the following conditions are established.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Shortest time change from lean (0.3 V O 2 output) to rich (0.5 V) when voltage changes from 0.25 V to 0.55 V | < or = 4000 ms |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 1 time(s)
Detect the rear oxygen sensor open or short circuit. Judge as NG when the rear oxygen sensor voltage can be determined to be abnormal considering conditions such as intake air amount, engine coolant temperature, main feedback control and deceleration fuel cut.
Scheme 210
- Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Minimum output voltage | 0.15 V |
| Or | |
| Maximum output voltage | < 0.55 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 200000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Diagnosis of the rear oxygen sensor voltage low side | Incomplete |
| Minimum output voltage | < or = 0.15 V |
| Maximum output voltage | > or = 0.55 V |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: Less than 1 second
Detect fuel system malfunction by the amount of main feedback control.
Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.
- Abnormality Judgement
Compare the diagnosed value (fsobd) with the threshold value, and if a condition meeting the malfunction criteria below continues for 10 s x 5 time(s) or more, judge that there is a fault in the fuel system.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Fsobd = (sglmd - tglmda) + faf + flaf | > or = Value of Map 2 |
| In this case: sglmd = measured lambda | |
| Tglmda = target lambda | |
| Faf = main feedback compensation coefficient every 64 milliseconds | |
| Flaf = main feedback learning compensation coefficient |
JUDGEMENT VALUE REFERENCE
MAP 2
| Amount of air (g (oz)/s) | 0 (0) | 2.34375 (0.08) | 4.6875 (0.17) | 7.03125 (0.25) | 9.375 (0.33) | 11.71875 (0.41) | 14.0625 (0.5) |
|---|---|---|---|---|---|---|---|
| FsobdL 1 (%) | 1.4 | 1.4 | 1.368623 | 1.319185 | 1.26975 | 1.265 | 1.265 |
MAP SPECIFICATION
Time Needed for Diagnosis: 10 s x 5 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Fsobd = (sglmd - tglmda) + faf + flaf | < 1.2 |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 10 s
Detect fuel system malfunction by the amount of main feedback control.
Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.
- Abnormality Judgement
Compare the diagnosed value (fsobd) with the threshold value, and if a condition meeting the malfunction criteria below continues for 10 s x 5 time(s) or more, judge that there is a fault in the fuel system.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Fsobd = (sglmd - tglmda) + faf + flaf | < Value of Map 2 |
| In this case: sglmd = measured lambda | |
| Tglmda = target lambda | |
| Faf = main feedback compensation coefficient every 64 milliseconds | |
| Flaf = main feedback learning compensation coefficient |
JUDGEMENT VALUE REFERENCE
MAP 2
| Amount of air (g (oz)/s) | 0 (0) | 2.34375 (0.08) | 4.6875 (0.17) | 7.03125 (0.25) | 9.375 (0.33) | 11.7187 5 (0.41) | 14.0625 (0.5) |
|---|---|---|---|---|---|---|---|
| FsobdL 1 (%) | 0.6 | 0.6 | 0.63137 | 0.68082 | 0.71025 | 0.72525 | 0.73025 |
MAP SPECIFICATION
Time Needed for Diagnosis: 10 s x 5 time(s)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgement
Judge as OK when the malfunction criteria below continues for 10 seconds.
Judgement Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Fsobd = (sglmd - tglmda) + faf + flaf | > or = 0.8 |
JUDGEMENT VALUE REFERENCE
Time Needed for Diagnosis: 10 s
Detect faults in the fuel temperature sensor output properties.
Diagnosis is performed in two methods (drift diagnosis and stuck diagnosis). If either is NG, judge as NG. If both are OK, Judge as OK and clear the NG.