SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P10AA00

DTC Code	DTC Name
P10AA00	Clogged EGR Port Imbalance Bank1

DESCRIPTION

Refer to DTC P030000.

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Refer to DTC P04019C.

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Refer to DTC P21951D.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P10AA00	Clogged EGR Port Imbalance Bank1	The difference in the air fuel ratios between the cylinders exceeds the threshold when the EGR valve is open (2 trip detection logic).	Intake manifold Fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (sensor 1) ECM	Does not come on	DTC stored	SAE Code: P10AA

MONITOR DESCRIPTION

By comparing the air fuel ratio when EGR valve is open and closed, a clog in an EGR port can be detected. If the imbalance becomes larger when the EGR valve is open, the ECM will determine that the EGR port is clogged and store this DTC.

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) [A].
Turn the GTS on.
Put the engine in Inspection Mode (Maintenance Mode).

Click here
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [B].
Turn the power switch off [C].
Turn the power switch on (READY).
Press the EV/HV mode selection switch to select HV mode.
Start the engine by depressing the accelerator pedal approximately 40% and accelerating the vehicle from 10 km/h (6 mph) to a speed between 50 and 60 km/h (31 to 37 mph) in 10 to 15 seconds [D].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Tech Tips

If the engine does not start, further depress the accelerator pedal.
Decelerate the vehicle to less than 10 km/h (6 mph) and allow the engine to stop [E].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Tech Tips

The vehicle can be decelerated by any method.
Repeat steps [D] and [E] above 15 to 20 times [F].
Enter the following menus: Powertrain / Engine / Trouble Codes [G].
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P10AA00.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system is malfunctioning.
If the judgment result is INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

Refer to Fuel Injector Circuit.

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CAUTION / NOTICE / HINT

Tech Tips

Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
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.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (DTC P10AA00)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P10AA00 is output	A
DTC P10AA00 and other DTCs are output	B

Tech Tips

If any DTCs other than DTC P10AA00 are output, troubleshoot those DTCs first.

GO TO DTC CHART Click here

REPLACE INTAKE MANIFOLD

Replace the intake manifold.

Click here

Tech Tips

Perform "Inspection After Repair" after replacing the intake system.

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Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

Turn the power switch off and wait for at least 30 seconds.

Result

Proceed to
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Check for DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
DTC P10AA00 is output	B

END

PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in Inspection Mode (Maintenance Mode).

Click here

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode
Start the engine and warm it up.

Tech Tips

The A/C switch and all accessories should be off and park (P) or neutral (N) should be selected.

Tester Display
Inspection Mode

Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Data List / Misfire Count Cylinder #1 to #4.

Tech Tips

When the "Control the Injection Volume" Active Test is selected (injection volume is 0%), if a misfire count increases, proceed to step 7 (Check Intake System).

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Volume

Data List Display
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4

According to the display on the GTS, perform the Active Test with the engine idling.

Check the misfire counts (Misfire Count Cylinder #1 to #4) while decreasing the injection volume in 5% increments.

Result
The cylinder whose misfire count has not increased can be assumed to be running rich. Therefore, perform inspections while focusing on that cylinder.

Result

Proceed to
NEXT

CHECK FOR EXHAUST GAS LEAK

Check for exhaust gas leaks.

OK
No gas leaks in exhaust system.

Tech Tips

Perform "Inspection After Repair" after repairing or replacing the exhaust system.

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE EXHAUST SYSTEM

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

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OK
No leaks from intake system.

Tech Tips

Perform "Inspection After Repair" after repairing or replacing the intake system.

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE INTAKE SYSTEM

INSPECT SPARK PLUG

Inspect the spark plug of the cylinder causing the imbalance.

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Tech Tips

Perform "Inspection After Repair" after replacing the spark plug.

Click here

Result

Proceed to
OK
NG

REPLACE SPARK PLUG Click here

CHECK FOR SPARK (SPARK TEST)

Perform a spark test.

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Tech Tips

If the result of the spark test is normal, proceed to the next step.
Perform "Inspection After Repair" after repairing or replacing the ignition system.

Click here

Result

Proceed to
NEXT

CHECK CYLINDER COMPRESSION PRESSURE

Measure the cylinder compression pressure of the misfiring cylinder.

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Tech Tips

Perform "Inspection After Repair" after repairing or replacing the engine assembly.

Click here

Result

Proceed to
OK
NG

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)

*a	Front view of wire harness connector (to Fuel Injector Assembly)

Disconnect the fuel injector assembly connector.
Turn the power switch on (IG).

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
C14-1 - Body ground	Power switch on (IG)	11 to 14 V
C15-1 - Body ground	Power switch on (IG)	11 to 14 V
C16-1 - Body ground	Power switch on (IG)	11 to 14 V
C17-1 - Body ground	Power switch on (IG)	11 to 14 V

Result

Proceed to
OK
NG

CHECK FUEL INJECTOR CIRCUIT Click here

CHECK FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE

Check the fuel injector assembly (whether fuel volume is high or low, and whether injection pattern is poor).

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Tech Tips

Perform "Inspection After Repair" after replacing the fuel injector assembly.

Click here

Result

Proceed to
OK
NG

REPLACE FUEL INJECTOR ASSEMBLY Click here

CHECK FOR CAUSE OF FAILURE

If the cause of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.

Check the intake valve for deposits.

Tech Tips

As the DTC may have been stored due to deposits on an intake valve, remove the cylinder head and check the intake valves.

Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

Turn the power switch off and wait for at least 30 seconds.

Result

Proceed to
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

OK
DTCs are not output.

Result

Proceed to
NEXT

END