DTC P2096: Post Catalyst Fuel Trim System Too Lean (Bank 1); DTC P2097: Post Catalyst Fuel Trim System Too Rich (Bank 1) [05/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read the DTCs.

   Result

   Result	Proceed to
   P2096 or P2097	A
   P2096 and/or P2097 and other DTCs	B

   HINT: 

   If any DTCs other than P2096 or P2097 are output, troubleshoot those DTCs first.

B → See step   31 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Start the engine.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Port.
6. Read the value Short #1 and Long FT #1.

   OK

   Short FT #1 + Long FT #1 = Between -19% and +19%

7. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.
8. Read the value Short FT #1 and Long FT #1.

   OK

   Short FT #1 + Long FT #1 = Between -19% and +19%

   Result

   Item		Proceed to
   Port	Direct
   OK	OK	A
   OK	NG	B
   NG	OK	C
   NG	NG	D

B → See step   18 

C → See step   23 

D → See step   4 

A: Go to next step 

1. Has the vehicle run out of fuel in the past?

NO → See step   35 

YES → DTC CAUSED BY RUNNING OUT OF FUEL 

1. Check the PCV hose connections. Refer to ON-VEHICLE INSPECTION [05/2014 - ] - STEP 1 .

   OK

   PCV valve and hose are connected correctly and are not damaged.

NG → REPAIR OR REPLACE PCV HOSE 

OK: Go to next step 

1. Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION [05/2014 - ] .

   OK

   No leaks in intake system.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn Techstream on.
4. Warm up the engine and run the engine at an engine speed of 2500 RPM for approximately 90 seconds.
5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1S1 and O2S B1S2.
6. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling.
7. Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream.

   HINT: 

   • Change the fuel injection volume within the range of -12% to 12%.
   • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
   • If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

   Techstream Display (Sensor)	Injection Volume	Status	Voltage
   AFS Voltage B1S1 (A/F)	12%	Rich	Less than 2.0 V
   	-12%	Lean	More than 2.4 V
   O2S B1S2 (HO2)	12%	Rich	More than 0.55 V
   	-12%	Lean	Less than 0.4 V

   Result

   Status AFS Voltage B1S1	Status O2S B1S2	A/F Condition and A/F Sensor Condition	Suspected Trouble Area	Proceed to
   Lean/Rich	Lean/Rich	Normal	-	A
   Lean	Lean	Actual air-fuel ratio lean	Ventilation valve and hose Ventilation hose connections Injector for port injection Gas leakage from exhaust system Air induction system Fuel pressure Mass Air Flow (MAF) meter Engine Coolant Temperature (ECT) sensor	A
   Rich	Rich	Actual air-fuel ratio rich	Gas leakage from exhaust system Ignition system Fuel pressure Mass air flow meter ECT sensor	A
   Lean	Lean/Rich	A/F sensor malfunction	Air fuel ratio sensor	B
   Rich	Lean/Rich	A/F sensor malfunction	Air fuel ratio sensor	B

   Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor output voltage (AFS Voltage) is consistently higher than 2.4 V, and the heated oxygen sensor output voltage (O2S) is consistently below 0.4 V.

   Rich: During the Control the Injection Volume for A/F Sensor Active Test, the AFS Voltage is consistently below 2.0 V, and the O2S is consistently higher than 0.55 V.

   Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output voltage of the heated oxygen sensor alternates correctly.

   HINT: 

   Refer to "Data List / Active Test" [AFS Voltage B1S1 and O2S B1S2]. Refer to DATA LIST / ACTIVE TEST [05/2014 - ] .

B → See step   10 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
5. Read the Coolant Temp twice, when the engine is both cold and warmed up.

   Standard

   With cold engine 

   Same as ambient air temperature.

   With warm engine 

   Between 75 and 100°C (167 and 212°F)

NG → See step   32 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Start the engine.
5. Enter the following menus: Powertrain / Engine / Data List / MAF, Coolant Temp and Engine Speed.
6. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher.
7. Read MAF with the engine speed at 3000 RPM.

   Standard

   Between 13.0 gm/sec and 14.0 gm/sec (shift lever: N, A/C: Off).

NG → See step   24 

OK: Go to next step 

1. Check for exhaust gas leaks.

   OK

   No gas leaks.

OK → See step   13 

NG → REPAIR OR REPLACE EXHAUST SYSTEM 

1. Inspect the air fuel ratio sensor. Refer to INSPECTION [05/2014 - ] .

NG → See step   33 

OK: Go to next step 

1. Disconnect the air fuel ratio sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the chart below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   A34-19 (A1A+) - C14-3 (A1A+)	Always	Below 1 Ω
   A34-18 (A1A-) - C14-4 (A1A-)	Always	Below 1 Ω
   A34-5 (HA1A) - C14-1 (HA1A)	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   A34-19 (A1A+) or C14-3 (A1A+) - Body ground	Always	10 kΩ or higher
   A34-18 (A1A-) or C14-4 (A1A-) - Body ground	Always	10 kΩ or higher
   A34-5 (HA1A) or C14-1 (HA1A) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the air fuel ratio sensor. Refer to REMOVAL [05/2014 - ] .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2014 - ] .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

NEXT: Go to next step 

1. Enter the following menus: Powertrain / Engine / Trouble Codes.
2. Read the pending DTCs.

   Result

   Result	Proceed to
   P2096 and/or P2097	A
   DTC is not output	B

B → END 

A: Go to next step 

1. Check the fuel pressure (low pressure side). Refer to ON-VEHICLE INSPECTION [05/2014 - ] .

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   24 

A: Go to next step 

1. Check the fuel pump operation. Refer to ON-VEHICLE INSPECTION [05/2014 - ] - STEP 1 .

NG → See step   39 

OK: Go to next step 

1. Check for fuel leaks (low pressure side).

   OK

   No leaks.

NG → REPAIR OR REPLACE FUEL SYSTEM (LOW PRESSURE SIDE) 

OK → CHECK AND REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL LINE AND FILTER 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Start the engine.
5. Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
6. While revving the engine, check that the fuel pressure fluctuates.

   Standard

   Idling 

   3000 to 5000 kPa (30.6 to 50.9 kgf/cm² , 436 to 725 psi).

   HINT: 

   The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.

NG → See step   21 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.

   HINT: 

   • The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.
   • Enter the following menus: Powertrain / Engine / Data List / Injection Switching Status and confirm Injection Switching Status is OK.
5. Read the value Short FT #1, Long FT #1 and Fuel Pump Duty.

   Result

   Item		Proceed to
   Fuel Pump Duty	Short FT #1 + Long FT #1
   10% to 40%	-	A
   40% or more	-20% or less	B
   10% or less	+20% or more	B
   40% or more	+20% or more	C
   10% or less	-20% or less	D

B → See step   34 

C → See step   22 

D → See step   36 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.

   HINT: 

   • The A/C switch and all accessory switches should be off, and the shift lever should be in the N, P or neutral position, and the engine should be fully warmed up.
   • Enter the following menus: Powertrain / Engine / Data List / Injection Switching Status and confirm Injection Switching Status is OK.
5. Read the value Short FT #1, Long FT #1 and Fuel Pump Duty.

   Result

   Item		Proceed to
   Fuel Pump Duty	Short FT #1 + Long FT #1
   10% to 40%	-25% or less	A
   10% to 40%	-25% to +25%	B
   10% to 40%	+25% or more	A

B → See step   38 

A → See step   37 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Start the engine.
5. Enter the following menus: Powertrain / Engine / Active test / Control the Injection Way / Direct.
6. Allow the engine to idle.
7. Monitor all of the misfire count values that are displayed on the Techstream: Powertrain / Engine / Data List / Cylinder #1 Misfire Count to Cylinder #4 Misfire Count.

   If no misfire counts occur for any of the cylinders, perform the following procedure:

   1. Move the shift lever to D.
   2. Monitor all of the misfire rate values that are displayed on the Techstream.

      Result

      Misfire Count	Proceed to
      No misfire counts, or misfire counts occur randomly in all cylinders	A
      Misfire counts occur in particular cylinder	B

B → See step   37 

A: Go to next step 

1. Replace the injector driver (EDU) with known good ones from another vehicle.
   NOTE:

   Do not disconnect and reconnect the connectors with the ignition switch to ON, as the injector driver (EDU) may be damaged.

2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2014 - ] .
6. Turn the ignition switch off and wait for at least 30 seconds.
7. Turn the ignition switch to ON and turn the Techstream on.
8. Start the engine and warm it up.
9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
10. Enter the following menus: Powertrain / Engine / Trouble Codes.
11. Read the pending DTCs.

    Result

    Result	Proceed to
    P2096 and/or P2097	A
    DTC is not output	B

B → END (INJECTOR DRIVER (EDU) IS DEFECTIVE) 

A → See step   40 

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

NG → See step   41 

OK → See step   36 

1. Check the connection and terminal contact pressure of connectors and wire harness between the mass air flow meter and ECM. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [05/2014 - ] .

   HINT: 

   Repair any problems.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2014 - ] .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Start the engine and warm it up.
7. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

NEXT: Go to next step 

1. Enter the following menus: Powertrain / Engine / Trouble Codes.
2. Read the pending DTCs.

   Result

   Result	Proceed to
   P2096 and/or P2097	A
   DTC is not output	B

B → END 

A: Go to next step 

1. Disconnect the mass air flow meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the chart below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   C33-22 (VG) - C16-5 (VG)	Always	Below 1 Ω
   C33-29 (E2G) - C16-4 (E2G)	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   C33-22 (VG) or C16-5 (VG) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the mass air flow meter. Refer to REMOVAL [05/2014 - ] .

   HINT: 

   If the result of the inspection performed in step 8 indicated no problem, proceed to the next step without replacing the mass air flow meter.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [05/2014 - ] .
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Start the engine and warm it up.
7. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

NEXT: Go to next step 

1. Enter the following menus: Powertrain / Engine / Trouble Codes.
2. Read the pending DTCs.

   Result

   Result	Proceed to
   P2096 and/or P2097	A
   DTC is not output	B

B → END 

A → See step   36