Diagnostic Method
Measure secondary air delivery pipe pressure, pulse of secondary air delivery pipe pressure and secondary air pipe airflow amount.
Pump supply pressure check
Perform the system function diagnosis with how much the pressure rises when the secondary air pump is turned from OFF to ON.
Judge as NG if delivery pipe pressure does not rise though it should when the secondary air pump turns OFF → ON.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Secondary air supply pipe pressure (after barometric pressure compensation) | < 0.9 kPa (7 mmHg, 0.3 inHg) | P0410 |
Time Needed for Diagnosis: 4000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Combination valve both closed pulse diagnosis
Perform open stuck diagnosis of both combination valves using delivery pipe pressure pulse when both combination valves are closed. Determine which side of valves is stuck open by comparing secondary air flow amount when RH combination valve is closed with that when LH combination valve is closed.
Calculate voltage pulse of the pump delivery pipe pressure when both combination valves are closed. The calculation should be small because there is no pulse from supply pipe pressure with both combination valves closed. When the calculation is large, determine that either of the combination valves is stuck open. Determine which side of valves is stuck open by comparing secondary air flow amount when the RH combination valve is closed with that when the LH combination valve is closed. Air flow amount is larger on the open stuck valve.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Pulse calculation value when both combination valves are closed | > Value of Map 3 | P2440 |
| Air flow amount when the right bank is closed (value from Map 4) | ≥ Air flow amount when the left bank is closed (value from Map 5) | |
| Pulse calculation value when both combination valves are closed | > Value of Map 3 | P2442 |
| Air flow amount when the left bank is closed (value from Map 5) | > Air flow amount when the right bank is closed (value from Map 4) |
Time Needed for Diagnosis: 992 ms + 992 ms + 992 ms + 4000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Combination valve changeover pressure diagnosis
Perform the RH combination valve stuck closed diagnosis with the variation of delivery pipe pressure when the RH combination valve turns closed → open.
Delivery pipe pressure should vary when the RH combination valve turns closed → open. When the variation is small, determine that the RH combination valve is stuck closed.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Pressure variation value when the RH combination valve is switched | < Value of Map 6 | P2441 |
Time Needed for Diagnosis: 992 ms + 992 ms + 992 ms + 4000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Perform the LH combination valve stuck closed diagnosis with the variation of delivery pipe pressure when the LH combination valve turns open → closed.
Delivery pipe pressure should vary when the LH combination valve turns open → closed. When the variation is small, determine that the LH combination valve is stuck closed.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Pressure variation value when the LH combination valve is switched | < Value of Map 7 | P2443 |
Time Needed for Diagnosis: 992 ms + 992 ms + 992 ms + 4000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Overflow diagnosis
Perform secondary air system flow abnormality diagnosis using both sides of combination valves secondary air amount when both are closed.
Judge as secondary air system flow abnormality either if there is excessive secondary air flow amount with the RH combination valve closed, or if there is excessive secondary airflow amount with the LH combination valve closed.
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Air flow amount when the right bank is closed (value from Map 4) | > Value of Map 8 | P0411 |
| or | ||
| Air flow amount when the left bank is closed (value from Map 5) | > Value of Map 9 |
Time Needed for Diagnosis: 992 ms + 992 ms + 992 ms + 4000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
| Intake air (g (oz)/rev) | 0.1 (0) | 0.25 (0.01) | 0.3 (0.01) | 1 (0.04) |
| Threshold value (V) | 100 | 100 | 4.5 | 4.5 |
| Secondary air pressure in the pipe when both comb, valve is closing kPa (mmHg, inHg) Secondary air pressure in the pipe when LH comb, valve is closing kPa (mmHg, inHg) | 69.3 (520, 20.5) | 74.7 (560, 22) | 80 (600, 23.6) | 85.3 (640, 25.2) | 90.7 (680, 26.8) | 96 (720, 28.3) | 101.3 (760, 29.9) | 106.7 (800, 31.5) | 112 (840, 33.1) | 117.3 (880, 34.6) | 122.7 (920, 36.2) | 128 (960, 37.8) | 133.3 (1000, 39.4) | 138.7 (1040, 40.9) | 144 (1080, 42.5) | 149.3 (1120, 44.1) |
| 69.3 (520, 20.5) | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 | 2400 | 2400 |
| 74.7 (560, 22) | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 | 2400 |
| 80 (600, 23.6) | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 |
| 85.3 (640, 25.2) | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 |
| 90.7 (680, 26.8) | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 |
| 96 (720, 28.3) | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 |
| 101.3 (760, 29.9) | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 |
| 106.7 (800, 31.5) | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 |
| 112 (840, 33.1) | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 |
| 117.3 (880, 34.6) | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 |
| 122.7 (920, 36.2) | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 |
| 128 (960, 37.8) | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 |
| 133.3 (1000, 39.4) | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 |
| 138.7 (1040, 40.9) | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 |
| 144 (1080, 42.5) | -2400 | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 |
| 149.3 (1120, 44.1) | -2400 | -2400 | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 |
| (L/min) | ||||||||||||||||
| Secondary air pressure in the pipe when both comb, valve is closing kPa (mmHg, inHg) Secondary air pressure in the pipe when RH comb, valve is closing kPa (mmHg, inHg) | 69.3 (520, 20.5) | 74.7 (560, 22) | 80 (600, 23.6) | 85.3 (640, 25.2) | 90.7 (680, 26.8) | 96 (720, 28.3) | 101.3 (760, 29.9) | 106.7 (800, 31.5) | 112 (840, 33.1) | 117.3 (880, 34.6) | 122.7 (920, 36.2) | 128 (960, 37.8) | 133.3 (1000, 39.4) | 138.7 (1040, 40.9) | 144 (1080, 42.5) | 149.3 (1120, 44.1) |
| 69.3 (520, 20.5) | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 | 2400 | 2400 |
| 74.7 (560, 22) | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 | 2400 |
| 80 (600, 23.6) | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2400 |
| 85.3 (640, 25.2) | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 |
| 90.7 (680, 26.8) | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 |
| 96 (720, 28.3) | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 |
| 101.3 (760, 29.9) | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 |
| 106.7 (800, 31.5) | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 |
| 112 (840, 33.1) | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 |
| 117.3 (880, 34.6) | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 | 1200 |
| 122.7 (920, 36.2) | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 | 1000 |
| 128 (960, 37.8) | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 | 800 |
| 133.3 (1000, 39.4) | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 | 600 |
| 138.7 (1040, 40.9) | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 | 400 |
| 144 (1080, 42.5) | -2400 | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 | 200 |
| 149.3 (1120, 44.1) | -2400 | -2400 | -2400 | -2400 | -2200 | -2000 | -1800 | -1600 | -1400 | -1200 | -1000 | -800 | -600 | -400 | -200 | 0 |
| (L/min) | ||||||||||||||||
| Amount of intake air when RH comb, valve switches (g (oz)/s) | 10 | 15 | 20 | 25 | 26 |
| Battery voltage when RH comb, valve switches (V) | (0.35) | (0.53) | (0.71) | (0.88) | (0.92) |
| 11 | 0.025 | 0.025 | 0.025 | 0.005 | 0 |
| 12 | 0.035 | 0.035 | 0.035 | 0.015 | 0 |
| 13 | 0.05 | 0.05 | 0.05 | 0.025 | 0 |
| 14 | 0.05 | 0.05 | 0.05 | 0.025 | 0 |
| (V) | |||||
| Amount of intake air when LH comb, valve switches (g (oz)/s) | 10 | 15 | 20 | 25 | 26 |
| Battery voltage when LH comb, valve switches (V) | (0.35) | (0.53) | (0.71) | (0.88) | (0.92) |
| 11 | 0.025 | 0.025 | 0.025 | 0.005 | 0 |
| 12 | 0.035 | 0.035 | 0.035 | 0.015 | 0 |
| 13 | 0.05 | 0.05 | 0.05 | 0.025 | 0 |
| 14 | 0.05 | 0.05 | 0.05 | 0.025 | 0 |
| (V) | |||||
| Amount of intake air when P0R is measuring (g (oz)/s) | 2 | 25 |
| Battery voltage when P0R measuring (V) | (0.07) | (0.88) |
| 11.5 | 345 | 345 |
| 12.5 | 345 | 345 |
| 13.5 | 345 | 345 |
| 14.5 | 390 | 390 |
| 15.5 | 420 | 420 |
| (L/min) | ||
| Amount of intake air when POL is measuring (g (oz)/s) | 2 | 25 |
| Battery voltage when POL measuring (V) | (0.07) | (0.88) |
| 11.5 | 345 | 345 |
| 12.5 | 345 | 345 |
| 13.5 | 345 | 345 |
| 14.5 | 390 | 390 |
| 15.5 | 420 | 420 |
| (L/min) | ||