DTC P219A: Bank 1 Air-Fuel Ratio Imbalance [08/2013 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read the DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC P219A is output	A
   DTC P219A and other DTCs are output	B

   HINT: 

   If any DTCs other than P219A are output, troubleshoot those DTCs first.

B → See step   14 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA [08/2013 - ] .

   Freeze Frame Data Items for DTC P219A 

   • Vehicle Speed
   • Engine Speed
   • Calculate Load
   • Short FT #1
   • Long FT #1
   • Cylinder #1 Misfire Count to Cylinder #4 Misfire Count
   • A/F Sensor Determination (worst value) #1
   • Engine Speed Fluctuation Avg (worst value) #1 to #4

   HINT: 

   When the sum of Short FT #1 and Long FT #1 is positive, the engine is running lean, and when the sum is negative, the engine is running rich.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

   HINT: 

   • If any misfire count ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count) increases while idling or driving the vehicle, proceed to step  6.
   • Perform inspections while focusing on the cylinder whose misfire count has increased.
5. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Fuel System / Details / A/F SENSOR DETERMINATION B1 and ENGINE SPEED FLUCTUATION AVERAGE B1.
6. Check the Test Result (A/F SENSOR DETERMINATION B1 and ENGINE SPEED FLUCTUATION AVERAGE B1).
   RESULT
   
   

   Result	Proceed to
   A/F SENSOR DETERMINATION is Fail	A
   A/F SENSOR DETERMINATION and ENGINE SPEED FLUCTUATION AVERAGE are Fail	B
   ENGINE SPEED FLUCTUATION AVERAGE is Fail	B*

   HINT: 

   • When the results of A/F SENSOR DETERMINATION and ENGINE SPEED FLUCTUATION AVERAGE are both Pass, drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern again.

     If both results are still Pass, proceed to step  4.

   • *: Perform inspections while focusing on the cylinder whose engine speed fluctuation value ("Engine Speed Fluctuation Avg (worst value) #1" to "Engine Speed Fluctuation Avg (worst value) #4") was the largest.

B → See step   6 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [08/2013 - ] .
5. Start the engine.
6. 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.

7. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Gas Misfire / 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).

8. Perform the Control the Injection Volume operation with the engine idling.
9. Check the misfire counts ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") while decreasing the injection volume in 5% increments.
   NOTE:

   Do not decrease the injection volume by more than 20%.

   Result

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

NEXT: Go to next step 

1. Check for exhaust gas leaks.

   OK

   No gas leaks.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the exhaust system. Refer to INITIALIZATION [08/2013 - ] .

NG → REPAIR OR REPLACE EXHAUST SYSTEM 

OK: Go to next step 

1. Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION [08/2013 - ] .

   OK

   No leaks in intake system.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the intake system. Refer to INITIALIZATION [08/2013 - ] .

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Inspect the spark plug of the cylinder causing the imbalance. Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 3 .

   HINT: 

   Perform "Inspection After Repair" after replacing the spark plug. Refer to INITIALIZATION [08/2013 - ] .

NG → See step   15 

OK: Go to next step 

1. Perform a spark test. Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1 .

   HINT: 

   • 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. Refer to INITIALIZATION [08/2013 - ] .

NEXT: Go to next step 

1. Measure the cylinder compression pressure of the misfiring cylinder. Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 9 .

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the engine assembly. Refer to INITIALIZATION [08/2013 - ] .

NG → CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION 

OK: Go to next step 

NG → See step   16 

OK: Go to next step 

1. Check the fuel injector assembly injection [whether fuel volume is high or low, and whether injection pattern is poor]. Refer to INSPECTION [08/2013 - ] .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION [08/2013 - ] .

NG → See step   17 

OK: Go to next step 

1. If the cause of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.
2. Check the intake valves for deposits.

   HINT: 

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

3. Check for deposits in the EGR delivery chamber.

   HINT: 

   The DTC may have been stored due to deposits that have accumulated in the EGR delivery chamber. Therefore, remove and inspect the EGR delivery chamber.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.
5. Turn the power switch off and wait for at least 30 seconds.
6. Turn the power switch on (IG).
7. Turn the Techstream on.
8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Check for DTCs.

    Result

    P219A is not output.

NEXT → END