Lexus ES: System Too Lean Bank 1 (P017100,P017200,P017400,P017500,P117000,P117B00)
DESCRIPTION
The fuel trim is related to the feedback compensation value, not to the basic injection duration. The fuel trim consists of both the short-term and long-term fuel trims.
The short-term fuel trim is fuel compensation that is used to constantly maintain the air fuel ratio at stoichiometric levels. The signal from the air fuel ratio sensor indicates whether the air fuel ratio is rich or lean compared to the stoichiometric ratio. This triggers a reduction in the fuel injection volume if the air fuel ratio is rich and an increase in the fuel injection volume if lean.
Factors such as individual engine differences, wear over time and changes in operating environment cause short-term fuel trim to vary from the central value. The long-term fuel trim, which controls overall fuel compensation, compensates for long-term deviations in the fuel trim from the central value caused by the short-term fuel trim compensation.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P017100 | System Too Lean Bank 1 | With a warm engine and stable air fuel ratio feedback, the fuel trim is considerably in error to the lean side (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0171 |
| P017200 | System Too Rich Bank 1 | With a warm engine and stable air fuel ratio feedback, the fuel trim is considerably in error to the rich side (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0172 |
| P017400 | System Too Lean Bank 2 | With a warm engine and stable air fuel ratio feedback, the fuel trim is considerably in error to the lean side (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0174 |
| P017500 | System Too Rich Bank 2 | With a warm engine and stable air fuel ratio feedback, the fuel trim is considerably in error to the rich side (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0175 |
| P117000 | Fuel Performance/Port Injector | Although a DTC is stored for a rich or lean condition, the amount of fuel trim during direct injection is normal (1 trip detection logic) |
| Does not come on | DTC stored | SAE Code: P1170 |
| P117B00 | Fuel Performance/Direct Injector | Although a DTC is stored for a rich or lean condition, the amount of fuel trim during port injection is normal (1 trip detection logic) |
| Does not come on | DTC stored | SAE Code: P117B |
HINT:
- When DTC P017100 or P017400 is stored, the actual air fuel ratio is on the lean side. When DTC P017200 or P017500 is stored, the actual air fuel ratio is on the rich side.
- If the vehicle runs out of fuel, the air fuel ratio is lean and DTC P017100 or P017400 may be stored. The MIL is then illuminated.
- When DTC P117000 or P117B00 is output , it may not be possible to precisely determine whether the port injection or the direct injection is malfunctioning, depending on the conditions. In this case, perform an Active Test (Control the Injection Mode) to determine which injection system is malfunctioning.
MONITOR DESCRIPTION
Under closed loop fuel control, fuel injection volumes that deviate from those estimated by the ECM cause changes in the long-term fuel trim compensation value. The long-term fuel trim is adjusted when there are persistent deviations in the short-term fuel trim values. Deviations from the fuel injection volumes estimated by the ECM also affect the average fuel trim learned value, which is a combination of the average short-term fuel trim (fuel feedback compensation value) and the average long-term fuel trim (learned value of the air fuel ratio). If the average fuel trim learned value exceeds the malfunction thresholds, the ECM interprets this as a fault in the fuel system and stores a DTC.
Example:
The average fuel trim learned value is +35% or higher, or -35% or less, the ECM interprets this as a fuel system malfunction.
MONITOR STRATEGY
| Related DTCs | P0171: Fuel trim lean (bank 1) P0172: Fuel trim rich (bank 1) P0174: Fuel trim lean (bank 2) P0175: Fuel trim rich (bank 2) P1170: Fuel trim (port injection fail) P117B: Fuel trim (direct injection fail) |
| Required Sensors/Components (Main) | Fuel system |
| Required Sensors/Components (Related) | Air fuel ratio sensor Mass air flow meter sub-assembly Crankshaft position sensor |
| Frequency of Operation | Continuous |
| Duration | Within 10 seconds |
| MIL Operation | 2 driving cycles: P0171, P0172, P0174, P0175 Immediate: P1170, P117B |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever the following DTCs are not stored | P0010, P0020 (VVT oil control solenoid bank 1, 2) P0011, P0021 (VVT system bank 1, 2 - advance) P0012, P0022 (VVT system bank 1, 2 - retard) P0013, P0023 (Exhaust VVT oil control solenoid bank 1, 2) P0014, P0024 (Exhaust VVT system bank 1, 2 - advance) P0015, P0025 (Exhaust VVT system bank 1, 2 - retard) P0016, P0018 (VVT system bank 1, 2 - misalignment) P0017, P0019 (Exhaust VVT system bank 1, 2 - misalignment) P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor heater) P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side)) P0101, P0102, P0103 (Mass air flow meter) P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0201, P0202, P0203, P0204, P0205, P0206, P062D, P21CF, P21D0, P21D1, P21D2, P21D3, P21D4 (Fuel injector) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343, P0345, P0347, P0348 (Camshaft position sensor) P0351 - P0356 (Igniter) P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust camshaft position sensor) P0500 (Vehicle speed sensor) P107B, P107C, P107D (Fuel pressure sensor (for low pressure side)) P11EA, P11EB, P11EC, P11ED, P11EE, P11EF, P11F0, P11F1, P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1 (Air-fuel ratio imbalance) |
| Fuel system status | Closed loop |
| Battery voltage | 11 V or higher |
| Either of the following conditions is met | 1 or 2 |
| 1. Engine speed | Less than 650 rpm |
| 2. Engine load | 12% or higher |
| Catalyst monitor | Not executed |
TYPICAL MALFUNCTION THRESHOLDS
P0171, P0172, P0174 and P0175: Fuel-Trim Lean/Rich| EVAP purge-cut | Executing |
| Either of the following conditions is met | 1 or 2 |
| 1. Average between short-term fuel trim and long-term fuel trim | 35% or higher (varies with engine coolant temperature) |
| 2. Average between short-term fuel trim and long-term fuel trim | -35% or less (varies with engine coolant temperature) |
| DTCs of fuel system have already been set | - |
| EVAP purge-cut | Executing |
| Direct injection | 100% |
| Both of the following conditions are met | 1 and 2 |
| 1. Average between short-term fuel trim and long-term fuel trim | Less than 35% (varies with engine coolant temperature) |
| 2. Average between short-term fuel trim and long-term fuel trim | Higher than -35% (varies with engine coolant temperature) |
| DTCs of fuel system have already been set | - |
| EVAP purge-cut | Executing |
| Port injection | 100% |
| Both of the following conditions are met | 1 and 2 |
| 1. Average between short-term fuel trim and long-term fuel trim | Less than 35% (varies with engine coolant temperature) |
| 2. Average between short-term fuel trim and long-term fuel trim | Higher than -35% (varies with engine coolant temperature) |
CONFIRMATION DRIVING PATTERN
HINT:
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
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- Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for at least 30 seconds.
- Turn the engine switch on (IG) [A].
- Turn the Techstream on.
- Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [B].
- With the engine warmed up, idle the engine for 2 minutes or more [C].
-
Drive the vehicle at a speed between 60 and 100 km/h (37 and 62 mph) for 5 minutes or more [D].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Enter the following menus: Powertrain / Engine / Trouble Codes [E].
-
Read the pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
WIRING DIAGRAM
-
Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.
Click here
-
Refer to DTC P219519 for the air fuel ratio sensor circuit.
Click here
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
-
Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
- Bank 2 refers to the bank that does not include the No. 1 cylinder.
- Sensor 1 refers to the sensor closest to the engine assembly.
- Sensor 2 refers to the sensor farthest away from the engine assembly.
- A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
- A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
- Read freeze frame data using the Techstream. 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
| 1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P017100, P017200, P017400, P017500, P117000 OR P117B00) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P017100, P017200, P017400, P017500, P117000 or P117B00 is output | A |
| DTC P017100, P017200, P017400, P017500, P117000 and/or P117B00 and other DTCs are output | B |
HINT:
If any DTCs other than P017100, P017200, P017400, P017500, P117000 or P117B00 are output, troubleshoot those DTCs first.
| B | .gif) | GO TO DTC CHART |
|
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| 2. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION MODE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode, Short FT B1S1, Long FT B1S1, Short FT B2S1 and Long FT B2S1.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Mode |
| Data List Display |
|---|
| Coolant Temperature |
| Injection Mode |
| Short FT B1S1 |
| Short FT B2S1 |
| Long FT B1S1 |
| Long FT B2S1 |
(f) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Port.
OK:
| Techstream Display | Specified Condition |
|---|---|
| Total of Short FT B1S1 (B2S1) and Long FT B1S1 (B2S1) | Between -19 and 19% |
(g) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct.
OK:
| Techstream Display | Specified Condition |
|---|---|
| Total of Short FT B1S1 (B2S1) and Long FT B1S1 (B2S1) | Between -19 and 19% |
| Item | Proceed to | |
|---|---|---|
| Port | Direct | |
| OK | OK | A |
| OK | NG | B |
| NG | OK | C |
| NG | NG | D |
| B | | GO TO STEP 4 |
| C | | GO TO STEP 11 |
| D | | GO TO STEP 12 |
|
| 3. | CHECK IF VEHICLE HAS RUN OUT OF FUEL IN PAST |
(a) Has the vehicle run out of fuel in the past?
| YES | | DTC CAUSED BY RUNNING OUT OF FUEL |
| NO | | CHECK FOR INTERMITTENT PROBLEMS |
| 4. | READ VALUE USING TECHSTREAM (FUEL PRESSURE (HIGH)) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Coolant Temperature, Fuel Pressure (High) and Injection Mode.
Powertrain > Engine > Data List| Tester Display |
|---|
| Engine Speed |
| Coolant Temperature |
| Fuel Pressure (High) |
| Injection Mode |
(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(f) According to the display on the Techstream, read the Data List.
Standard:
| Techstream Display | Condition | Specified Condition |
|---|---|---|
| Fuel Pressure (High) |
| 2400 to 20000 kPag |
| NG | | GO TO STEP 7 |
|
| 5. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION MODE (DIRECT)) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, High Pressure Fuel Pump Duty Ratio (D4), Injection Mode, Short FT B1S1, Long FT B1S1, Short FT B2S1 and Long FT B2S1.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Mode |
| Data List Display |
|---|
| Coolant Temperature |
| High Pressure Fuel Pump Duty Ratio (D4) |
| Injection Mode |
| Short FT B1S1 |
| Short FT B2S1 |
| Long FT B1S1 |
| Long FT B2S1 |
(f) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct.
HINT:
The A/C switch and all accessory switches should be off, and the shift lever should be in the P position, and the engine should be fully warmed up.
| Item | Proceed to | |||
|---|---|---|---|---|
| Injection Mode | High Pressure Fuel Pump Duty Ratio (D4) | Short FT B1S1 + Long FT B1S1 | Short FT B2S1 + Long FT B2S1 | |
| Direct | 10% to 40% | - | - | A |
| 40% or higher | -20% or less | -20% or less | B | |
| 10% or less | 20% or higher | 20% or higher | ||
| 40% or higher | 20% or higher | 20% or higher | C | |
| 10% or less | -20% or less | -20% or less | D | |
HINT:
Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).
Click here
| B | | REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)) |
| C | | GO TO STEP 8 |
| D | | REPLACE ECM |
|
| 6. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION MODE (DIRECT)) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, High Pressure Fuel Pump Duty Ratio (D4), Injection Mode, Short FT B1S1, Long FT B1S1, Short FT B2S1 and Long FT B2S1.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Mode |
| Data List Display |
|---|
| Coolant Temperature |
| High Pressure Fuel Pump Duty Ratio (D4) |
| Injection Mode |
| Short FT B1S1 |
| Short FT B2S1 |
| Long FT B1S1 |
| Long FT B2S1 |
(f) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct.
HINT:
The A/C switch and all accessory switches should be off, and the shift lever should be in the P position, and the engine should be fully warmed up.
| Item | Proceed to | |||
|---|---|---|---|---|
| Injection Mode | High Pressure Fuel Pump Duty Ratio (D4) | Short FT B1S1 + Long FT B1S1 | Short FT B2S1 + Long FT B2S1 | |
| Direct | 10% to 40% | -25% or less | -25% or less | A |
| 10% to 40% | 30% or higher | 30% or higher | ||
| 10% to 40% | -25% or less | -25% to 25% | B | |
| 10% to 40% | 25% or higher | -25% to 25% | ||
| 10% to 40% | -25% to 25% | -25% or less | C | |
| 10% to 40% | -25% to 25% | 25% or higher | ||
| 10% to 40% | -25% to 25% | -25% to 25% | D | |
HINT:
Perform "Inspection After Repair" after replacing the direct fuel injector assembly.
Click here
| A | | REPLACE DIRECT FUEL INJECTOR ASSEMBLY (ALL CYLINDERS) |
| B | | REPLACE DIRECT FUEL INJECTOR ASSEMBLY (BANK 1) |
| C | | REPLACE DIRECT FUEL INJECTOR ASSEMBLY (BANK 2) |
| D | | CHECK FOR INTERMITTENT PROBLEMS |
| 7. | CHECK MISFIRE COUNT OF DIRECT INJECTION |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #6.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Mode |
| Data List Display |
|---|
| Coolant Temperature |
| Injection Mode |
| Misfire Count Cylinder #1 |
| Misfire Count Cylinder #2 |
| Misfire Count Cylinder #3 |
| Misfire Count Cylinder #4 |
| Misfire Count Cylinder #5 |
| Misfire Count Cylinder #6 |
(f) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct.
HINT:
The A/C switch and all accessory switches should be off, and the shift lever should be in the P position, and the engine should be fully warmed up.
| Injection Mode | Misfire Count | Proceed to |
|---|---|---|
| Direct | No misfire counts, or misfire counts occur randomly in all cylinders | A |
| Misfire counts occur in particular cylinder | B |
HINT:
Perform "Inspection After Repair" after replacing the direct fuel injector assembly.
Click here
| B | | REPLACE DIRECT FUEL INJECTOR ASSEMBLY |
|
| 8. | REPLACE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) |
(a) Replace the fuel pump assembly (for high pressure side).
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).
Click here
|
| 9. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
|
| 10. | CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P017100, P017200, P017400, P017500, P117000 OR P117B00) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P017100, P017200, P017400, P017500, P117000 and/or P117B00 are output | B |
| A | | END |
| B | | REPLACE ECM |
| 11. | INSPECT PORT FUEL INJECTOR ASSEMBLY |
(a) Check the injection volume (whether fuel volume is high or low, and whether injection pattern is poor).
Click here
HINT:
Perform "Inspection After Repair" after replacing the port fuel injector assembly.
Click here
| OK | | REPLACE ECM |
| NG | | REPLACE PORT FUEL INJECTOR ASSEMBLY |
| 12. | CHECK PCV HOSE CONNECTIONS |
(a) Check the PCV hose connections.
Click here
OK:
PCV valve and hose are connected correctly and are not damaged.
| NG | | REPAIR OR REPLACE PCV HOSE |
|
| 13. | CHECK INTAKE SYSTEM |
(a) Check the intake system for vacuum leaks.
Click here
OK:
No leaks in intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system.
Click here
| NG | | REPAIR OR REPLACE INTAKE SYSTEM |
|
| 14. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
(e) Warm up the air fuel ratio sensor at an engine speed of 2500 rpm for 90 seconds.
(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / Coolant Temperature, A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2 or A/F (O2) Sensor Voltage B2S1 and O2 Sensor Voltage B2S2.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Volume for A/F Sensor |
| Data List Display |
|---|
| Coolant Temperature |
| A/F (O2) Sensor Voltage B1S1 |
| A/F (O2) Sensor Voltage B2S1 |
| O2 Sensor Voltage B1S2 |
| O2 Sensor Voltage B2S2 |
(g) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.
(h) Monitor the voltage outputs of the air fuel ratio sensor and the heated oxygen sensor (A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2 or A/F (O2) Sensor Voltage B2S1 and O2 Sensor Voltage B2S2) displayed on the Techstream.
HINT:
- The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
- 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.
Standard:
| Techstream Display (Sensor) | Injection Volume | Status | Voltage |
|---|---|---|---|
| A/F (O2) Sensor Voltage B1S1 A/F (O2) Sensor Voltage B2S1 (Air fuel ratio) | 12.5% | Rich | Below 3.1 V |
| -12.5% | Lean | Higher than 3.4 V | |
| O2 Sensor Voltage B1S2 O2 Sensor Voltage B2S2 (Heated oxygen) | 12.5% | Rich | Higher than 0.55 V |
| -12.5% | Lean | Below 0.4 V |
| Status of A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1 | Status of O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2 | Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition | Suspected Trouble Area | Proceed to |
|---|---|---|---|---|
| Lean/Rich | Lean/Rich | Normal | - | A |
| Lean | Lean | Actual air fuel ratio lean |
| |
| Rich | Rich | Actual air fuel ratio rich |
| |
| Lean | Lean/Rich | Air fuel ratio sensor malfunction |
| B |
| Rich | Lean/Rich | Air fuel ratio sensor malfunction |
|
- Lean: During Control the Injection Volume for A/F Sensor of the Active Test, the air fuel ratio sensor output voltage (A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2) is consistently below 0.4 V.
- Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1 is consistently below 3.1 V, and the O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2 is consistently higher than 0.55 V.
- Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the air fuel ratio sensor or heated oxygen sensor alternates correctly.
HINT:
Refer to "Data List / Active Test" [A/F (O2) Sensor Voltage B1S1, O2 Sensor Voltage B1S2, A/F (O2) Sensor Voltage B2S1 or O2 Sensor Voltage B2S2].
Click here
| B | | GO TO STEP 22 |
|
| 15. | READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
Powertrain > Engine > Data List| Tester Display |
|---|
| Coolant Temperature |
(e) Read the Data List twice, when the engine is both cold and warmed up.
Standard:
| Techstream Display | Condition | Specified Condition |
|---|---|---|
| Coolant Temperature | Cold engine | Same as ambient air temperature |
| Warm engine | Between 75 and 100°C (167 and 212°F) |
HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
Click here
| NG | | REPLACE ENGINE COOLANT TEMPERATURE SENSOR |
|
| 16. | READ VALUE USING TECHSTREAM (MASS AIR FLOW SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.
Powertrain > Engine > Data List| Tester Display |
|---|
| Engine Speed |
| Mass Air Flow Sensor |
| Coolant Temperature |
(e) Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
(f) Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.
Standard:
| Techstream Display | Condition | Specified Condition |
|---|---|---|
| Mass Air Flow Sensor | Engine warmed up Shift position: P A/C: Off Engine Speed: 3000 rpm | Between 10.6 and 15.8 gm/sec |
| NG | | GO TO STEP 29 |
|
| 17. | CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE) |
(a) Check the fuel pressure (for low pressure side).
Click here
| NG | | GO TO STEP 21 |
|
| 18. | CHECK FOR EXHAUST GAS LEAK |
(a) Check for exhaust gas leaks.
OK:
No gas leaks.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system.
Click here
| NG | | REPAIR OR REPLACE EXHAUST SYSTEM |
|
| 19. | INSPECT SPARK PLUG |
(a) Inspect the spark plug.
Click here
HINT:
Perform "Inspection After Repair" after replacing the spark plug.
Click here
| NG | | REPLACE SPARK PLUG |
|
| 20. | CHECK FOR SPARK (SPARK TEST) |
(a) Perform a spark test.
Click here
HINT:
- If the result of the spark test is normal, proceed to the next step.
-
Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly.
Click here
| NEXT | | GO TO STEP 29 |
| 21. | CHECK FUEL LINE |
(a) Check the fuel lines for leaks or blockage.
| OK | | GO TO FUEL PUMP CONTROL CIRCUIT |
| NG | | REPAIR OR REPLACE FUEL SYSTEM |
| 22. | INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) |
(a) Inspect the air fuel ratio sensor.
Click here
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here
| NG | | REPLACE AIR FUEL RATIO SENSOR |
|
| 23. | CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR) |
| *a | Front view of wire harness connector (to Air Fuel Ratio Sensor) | *b | Bank 1 |
| *c | Bank 2 | - | - |
(a) Disconnect the air fuel ratio sensor connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C26-2 (+B) - Body ground | Engine switch on (IG) | 11 to 14 V |
| C27-2 (+B) - Body ground | Engine switch on (IG) | 11 to 14 V |
| NG | | GO TO STEP 32 |
|
| 24. | CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) |
(a) Disconnect the air fuel ratio sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C26-1 (HA1A) - C32-52 (HA1A) | Always | Below 1 Ω |
| C26-3 (A1A+) - C32-125 (A1A+) | Always | Below 1 Ω |
| C26-4 (A1A-) - C32-126 (A1A-) | Always | Below 1 Ω |
| C27-1 (HA2A) - C32-17 (HA2A) | Always | Below 1 Ω |
| C27-3 (A2A+) - C32-123 (A2A+) | Always | Below 1 Ω |
| C27-4 (A2A-) - C32-124 (A2A-) | Always | Below 1 Ω |
| C26-1 (HA1A) or C32-52 (HA1A) - Body ground and other terminals | Always | 10 kΩ or higher |
| C26-3 (A1A+) or C32-125 (A1A+) - Body ground and other terminals | Always | 10 kΩ or higher |
| C26-4 (A1A-) or C32-126 (A1A-) - Body ground and other terminals | Always | 10 kΩ or higher |
| C27-1 (HA2A) or C32-17 (HA2A) - Body ground and other terminals | Always | 10 kΩ or higher |
| C27-3 (A2A+) or C32-123 (A2A+) - Body ground and other terminals | Always | 10 kΩ or higher |
| C27-4 (A2A-) or C32-124 (A2A-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 25. | REPLACE AIR FUEL RATIO SENSOR |
(a) Replace the air fuel ratio sensor.
Click here
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here
|
| 26. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
|
| 27. | CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P017100, P017200, P017400, P017500, P117000 and/or P117B00 are output | B |
| A | | END |
|
| 28. | READ VALUE USING TECHSTREAM (MASS AIR FLOW SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.
Powertrain > Engine > Data List| Tester Display |
|---|
| Engine Speed |
| Mass Air Flow Sensor |
| Coolant Temperature |
(e) Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
(f) Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.
Standard:
| Techstream Display | Condition | Specified Condition |
|---|---|---|
| Mass Air Flow Sensor | Engine warmed up Shift position: P A/C: Off Engine Speed: 3000 rpm | Between 10.6 and 15.8 gm/sec |
|
| 29. | CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) |
(a) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.
Click here
HINT:
Repair any problems.
|
| 30. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
|
| 31. | CHECK WHETHER DTC OUTPUT RECURS (DTC P017100, P017200, P017400, P017500, P117000 OR P117B00) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P017100, P017200, P017400, P017500, P117000 and/or P117B00 are output | B |
| A | | END |
| B | | GO TO STEP 36 |
| 32. | INSPECT A/F HTR RELAY |
(a) Inspect the A/F HTR relay.
Click here
| NG | | REPLACE A/F HTR RELAY |
|
| 33. | CHECK TERMINAL VOLTAGE (POWER SOURCE OF A/F HTR RELAY) |
.png)
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | A/F HTR Relay |
(a) Remove the A/F HTR relay from the No. 1 engine room relay block and No. 1 junction block assembly.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3 (A/F HTR relay) - Body ground | Always | 11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - A/F HTR RELAY) |
|
| 34. | CHECK HARNESS AND CONNECTOR (A/F HTR RELAY - BODY GROUND) |
(a) Remove the A/F HTR relay from the No. 1 engine room relay block and No. 1 junction block assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 1 (A/F HTR relay) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 35. | CHECK HARNESS AND CONNECTOR (A/F HTR RELAY - AIR FUEL RATIO SENSOR) |
(a) Remove the A/F HTR relay from the No. 1 engine room relay block and No. 1 junction block assembly.
(b) Disconnect the air fuel ratio sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 5 (A/F HTR relay) - C26-2 (+B) | Always | Below 1 Ω |
| 5 (A/F HTR relay) - C27-2 (+B) | Always | Below 1 Ω |
| 5 (A/F HTR relay) or C26-2 (+B) - Body ground and other terminals | Always | 10 kΩ or higher |
| 5 (A/F HTR relay) or C27-2 (+B) - Body ground and other terminals | Always | 10 kΩ or higher |
| OK | | REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - A/F HTR RELAY) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 36. | CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) |
(a) Disconnect the mass air flow meter sub-assembly connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C18-3 (5V) - C32-90 (VC) | Always | Below 1 Ω |
| C18-1 (FG) - C32-116 (VG) | Always | Below 1 Ω |
| C18-2 (E2G) - C32-115 (E2G) | Always | Below 1 Ω |
| C18-3 (5V) or C32-90 (VC) - Body ground and other terminals | Always | 10 kΩ or higher |
| C18-1 (FG) or C32-116 (VG) - Body ground and other terminals | Always | 10 kΩ or higher |
| C18-2 (E2G) or C32-115 (E2G) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 37. | INSPECT MASS AIR FLOW METER SUB-ASSEMBLY |
(a) Inspect the mass air flow meter sub-assembly.
Click here
|
| 38. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
|
| 39. | CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P017100, P017200, P017400, P017500, P117000 and/or P117B00 are output | B |
| A | | END |
| B | | REPLACE ECM |
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