DESCRIPTION
Refer to DTC P0300 (See page ).
Refer to DTC P2195 (See page ).
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P219A |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
P219C |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
P219D |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
P219E |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
P219F |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
MONITOR DESCRIPTION
Fuel System Air Fuel Ratio Cylinder Imbalance MonitorThe ECM uses the air fuel ratio sensor and crankshaft position sensor to monitor the difference in air fuel ratios between the cylinders caused by differences in injection volume between the cylinders, leakage in the intake or exhaust system, etc.
When the air fuel ratios of the cylinders are lean or rich with respect to each other, the ECM determines that a problem is present and stores a DTC.
Air Fuel Ratio Sensor Monitoring Method: P219A is stored primarily when a rich side imbalance is detected.When the system detects a difference in the air fuel ratios between the cylinders due to fluctuation in the air fuel ratio sensor output over 1 engine cycle (2 crankshaft revolutions), the system determines that there is a problem.
Crankshaft Position Sensor Monitoring Method: P219C, P219D, P219E and/or P219F are stored primarily when a lean side imbalance is detected.The system monitors the engine speed variation and when the variation becomes large, the system determines that there is a difference in the air fuel ratios between the cylinders, which it determines to be a problem.
MONITOR STRATEGY
Related DTCs |
P219A: Air fuel ratio cylinder imbalance monitor (bank 1) P219C: Air fuel ratio cylinder imbalance monitor (cylinder 1) P219D: Air fuel ratio cylinder imbalance monitor (cylinder 2) P219E: Air fuel ratio cylinder imbalance monitor (cylinder 3) P219F: Air fuel ratio cylinder imbalance monitor (cylinder 4) |
Required Sensors/Components (Main) |
Air fuel ratio sensor, Crankshaft position sensor |
Required Sensors/Components (Related) |
Mass air flow meter sub-assembly, Engine coolant temperature sensor, Vehicle speed sensor |
Frequency of Operation |
Once per driving cycle |
Duration |
10 seconds: P219A 30 seconds: Others |
MIL Operation |
2 driving cycles |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
P219A
Monitor runs whenever the following DTCs are not stored |
P0010 (VVT oil control valve) P0011 (VVT system - advance) P0012 (VVT system - retard) P0013 (Exhaust VVT oil control valve) P0014 (Exhaust VVT system - advance) P0015 (Exhaust VVT system - retard) P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0031, P0032, P101D (Air fuel ratio sensor heater) P0102, P0103 (Mass air flow meter) P0115, P0117, P0118 (Engine coolant temperature sensor) P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0335 (Crankshaft position sensor) P0340, P0342, P0343 (Camshaft position sensor) P0351 - P0354 (Igniter) P0365, P0367, P0368 (Exhaust camshaft position sensor) P0500 (Vehicle speed sensor) |
Monitor runs whenever following DTCs are not present |
None |
Air fuel ratio sensor status |
Activated |
Engine speed |
1500 rpm or higher, and less than 2300 rpm |
Engine coolant temperature |
75°C (167°F) or higher |
Atmospheric pressure |
76 kPa(abs) [570 mmHg(abs)] or higher |
Fuel system status |
Closed loop |
Mass air flow |
27.5 gm/sec or more, and less than 40 gm/sec |
Vehicle speed |
Less than 3 km/h (1.875 mph) |
Engine speed |
500 rpm or higher, and less than 1000 rpm |
Engine coolant temperature |
75°C (167°F) or higher |
Air fuel ratio sensor status |
Activated |
Fuel system status |
Closed loop |
Battery voltage |
11 V or higher |
TYPICAL MALFUNCTION THRESHOLDS
P219A: Air Fuel Ratio Sensor Monitoring Method
Air fuel ratio sensor monitoring method criteria (rich side imbalance) |
0.135 or more |
Crankshaft position sensor monitoring method criteria (lean side imbalance) |
1 or more |
MONITOR RESULT
Refer to Checking Monitor Status (See page
).
CONFIRMATION DRIVING PATTERN
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
It is acceptable to turn electrical loads on while driving.
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N.
HINT:
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Refer to the values of mass air flow and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Refer to the values of mass air flow and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N.
HINT:
Techstream Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
HINT:
WIRING DIAGRAM
Refer to Fuel Injector Circuit (See page ).
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
CHECK ANY OTHER DTCS OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read DTCs.
Result
Result |
Proceed to |
---|---|
DTC P219A, P219C, P219D, P219E and/or P219F is output |
A |
DTC P219A, P219C, P219D, P219E and/or P219F and other DTCs are output |
B |
HINT:
If any DTCs other than P219A, P219C, P219D, P219E and/or P219F are output, troubleshoot those DTCs first.
B |
GO TO DTC CHART |
|
2. |
READ VALUE USING TECHSTREAM (FREEZE FRAME DATA) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).
HINT:
When the sum of Short FT and Long FT is positive, the engine is running lean, and when the sum is negative, the engine is running rich.
Air Fuel Ratio Sensor Monitoring Method (P219A) |
Crankshaft Position Sensor Monitoring Method (P219C, P219D, P219E and P219F) |
Note |
---|---|---|
DTCs are output |
DTC is output (Only one DTC relating to a single cylinder is output) |
Malfunctioning of cylinders detected by Crankshaft Position Sensor Monitoring Method is primarily suspected |
DTCs are output |
DTCs are output (Multiple DTCs relating to multiple cylinders are output) |
Malfunctioning of cylinders except ones detected by Crankshaft Position Sensor Monitoring Method is primarily suspected.* |
DTCs are not output |
DTCs are output |
Malfunctioning of cylinders detected by Crankshaft Position Sensor Monitoring Method is primarily suspected. |
DTCs are output |
DTCs are not output |
Malfunctioning of the bank detected by Air Fuel Ratio Sensor Monitoring Method is primarily suspected |
*: When any air-fuel ratio imbalance is detected, the ECM will perform air-fuel ratio feedback control to make the air-fuel ratio close to the stoichiometric level. This may result in an air-fuel ratio imbalance of normal cylinders and DTCs may be stored.
|
3. |
READ DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
HINT:
(e) Enter the following menus: Powertrain / Engine / Trouble Codes.
(f) Read the DTCs.
Result
Result |
Proceed to |
---|---|
P219A is output |
A |
DTC P219A, and P219C, P219D, P219E or P219F is output |
B |
DTC P219C, P219D, P219E and/or P219F is output |
B |
GO TO STEP 6 |
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Warm up the engine.
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Data List / Cylinder #1 to #4 Misfire Count.
HINT:
When the "Control the Injection Volume" Active Test is selected (injection volume is 0%), if a misfire count increases, proceed to step 6 (Check Intake System).
(f) Perform the Control the Injection Volume operation with the engine idling.
(g) Check the misfire counts ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") while decreasing the injection volume in 5% increments.
NOTICE:
Do not decrease the injection volume by more than 20%.
The cylinder whose misfire count has not increased can be assumed to be running rich. Therefore, perform inspections while focusing on that cylinder.
|
5. |
CHECK FOR EXHAUST GAS LEAK |
(a) Check for exhaust gas leaks.
OK:
No exhaust gas leaks.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system (See page ).
NG |
REPAIR OR REPLACE EXHAUST SYSTEM |
|
6. |
CHECK INTAKE SYSTEM |
(a) Check the intake system for vacuum leaks (See page ).
OK:
No leaks in intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system (See page ).
NG |
REPAIR OR REPLACE INTAKE SYSTEM |
|
7. |
INSPECT SPARK PLUG |
(a) Inspect the spark plug of the cylinder causing the imbalance (See page ).
HINT:
Perform "Inspection After Repair" after replacing the spark plug (See page ).
NG |
REPLACE SPARK PLUG |
|
8. |
CHECK FOR SPARK (SPARK TEST) |
(a) Perform a spark test (See page ).
HINT:
|
9. |
CHECK CYLINDER COMPRESSION PRESSURE |
(a) Measure the cylinder compression pressure of the misfiring cylinder (See page ).
HINT:
Perform "Inspection After Repair" after repairing or replacing the engine assembly (See page ).
NG |
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION |
|
10. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR) |
NG |
GO TO FUEL INJECTOR CIRCUIT |
|
11. |
CHECK FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE |
(a) Check the fuel injector injection [whether fuel volume is high or low, and
whether injection pattern is poor] (See page
).
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly (See page ).
NG |
REPLACE FUEL INJECTOR ASSEMBLY |
|
12. |
CHECK FOR CAUSE OF FAILURE |
(a) If the case of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.
(b) Check the intake valve for deposits.
HINT:
As the DTC may have been stored due to deposits on the intake valve, remove the cylinder head and check the intake valve remove the cylinder head and check the intake valve.
|
13. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Check for DTCs.
DTCs are not output.
NEXT |
END |
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DESCRIPTION
This DTC is stored when LIN communication from the certification ECU stops for
a certain amount of time.
DTC No.
DTC Detection Condition
Trouble Area
B2785
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DESCRIPTION
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DTC No.
DTC Detection Condition
Trouble Area
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MONITOR DESCRIPTION
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DTC No.
DTC Detection Condition
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