Lexus ES: O2 Sensor Circuit Bank 1 Sensor 2 Circuit Short to Ground (P013611,...,P015623)
DESCRIPTION
In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) components in the exhaust gas, a TWC (Three-Way Catalytic Converter) is used. For the most efficient use of the TWC, the air fuel ratio must be precisely controlled so that it is always close to the stoichiometric air fuel level. For the purpose of helping the ECM to deliver accurate air fuel ratio control, a heated oxygen sensor is used.
The heated oxygen sensor is located behind the TWC, and detects the oxygen concentration in the exhaust gas. Since the sensor is integrated with the heater that heats the sensing portion, it is possible to detect the oxygen concentration even when the intake air volume is low (the exhaust gas temperature is low).
When the air fuel ratio becomes lean, the oxygen concentration in the exhaust gas is high. The heated oxygen sensor informs the ECM that the post-TWC air fuel ratio is lean (low voltage, i.e. less than 0.45 V).
Conversely, when the air fuel ratio is richer than the stoichiometric air fuel level, the oxygen concentration in the exhaust gas is low. The heated oxygen sensor informs the ECM that the post-TWC air fuel ratio is rich (high voltage, i.e. higher than 0.45 V). The heated oxygen sensor has the property of changing its output voltage drastically when the air fuel ratio is close to the stoichiometric level.
The ECM uses the supplementary information from the heated oxygen sensor to determine whether the air fuel ratio after the TWC is rich or lean, and adjusts the fuel injection duration accordingly. Thus, if the heated oxygen sensor is working improperly due to internal malfunctions, the ECM is unable to compensate for deviations in the primary air fuel ratio control.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P013611 | O2 Sensor Circuit Bank 1 Sensor 2 Circuit Short to Ground | Low impedance:
|
| Comes on | DTC stored | SAE Code: P0136 |
| P013613 | O2 Sensor Circuit Bank 1 Sensor 2 Circuit Open | Abnormal voltage output:
|
| Comes on | DTC stored | SAE Code: P0136 |
| P013614 | O2 Sensor Circuit Bank 1 Sensor 2 Circuit Short to Ground or Open | High impedance:
|
| Comes on | DTC stored | SAE Code: P0137 |
| P013615 | O2 Sensor Circuit Bank 1 Sensor 2 Circuit Short to Battery or Open | Extremely high voltage (short):
|
| Comes on | DTC stored | SAE Code: P0138 |
| P013617 | O2 Sensor Circuit Bank 1 Sensor 2 Circuit Voltage Above Threshold | Low voltage (open):
|
| Comes on | DTC stored | SAE Code: P0137 |
| P013623 | O2 Sensor Circuit Bank 1 Sensor 2 Signal Stuck Low | Heated oxygen sensor (bank 1 sensor 2) voltage does not drop to less than 0.2 V immediately during fuel cut starts (2 trip detection logic) |
| Comes on | DTC stored | SAE Code: P0139 |
| P013A00 | O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 2 | Heated oxygen sensor (bank 1 sensor 2) voltage does not drop from 0.35 V to 0.2 V immediately during fuel cut starts (1 trip detection logic) |
| Comes on | DTC stored | SAE Code: P013A |
| P013C00 | O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 2 | Heated oxygen sensor (bank 2 sensor 2) voltage does not drop from 0.35 V to 0.2 V immediately during fuel cut starts (1 trip detection logic) |
| Comes on | DTC stored | SAE Code: P013C |
| P015611 | O2 Sensor Circuit Bank 2 Sensor 2 Circuit Short to Ground | Low impedance:
|
| Comes on | DTC stored | SAE Code: P0156 |
| P015613 | O2 Sensor Circuit Bank 2 Sensor 2 Circuit Open | Abnormal voltage output:
|
| Comes on | DTC stored | SAE Code: P0156 |
| P015614 | O2 Sensor Circuit Bank 2 Sensor 2 Circuit Short to Ground or Open | High impedance:
|
| Comes on | DTC stored | SAE Code: P0157 |
| P015615 | O2 Sensor Circuit Bank 2 Sensor 2 Circuit Short to Battery or Open | Extremely high voltage (short):
|
| Comes on | DTC stored | SAE Code: P0158 |
| P015617 | O2 Sensor Circuit Bank 2 Sensor 2 Circuit Voltage Above Threshold | Low voltage (open):
|
| Comes on | DTC stored | SAE Code: P0157 |
| P015623 | O2 Sensor Circuit Bank 2 Sensor 2 Signal Stuck Low | Heated oxygen sensor (bank 2 sensor 2) voltage does not drop to less than 0.2 V immediately during fuel cut starts (2 trip detection logic) |
| Comes on | DTC stored | SAE Code: P0159 |
MONITOR DESCRIPTION
Active Air fuel Ratio Control
The ECM usually performs air fuel ratio feedback control so that the air fuel ratio sensor output indicates a near stoichiometric air fuel level. This vehicle includes active air fuel ratio control in addition to regular air fuel ratio control. The ECM performs active air fuel ratio control to detect any deterioration in the Three-Way Catalytic Converter (TWC) and heated oxygen sensor malfunctions (refer to the diagram below).
Active air fuel ratio control is performed for approximately 30 seconds while driving with a warm engine. During active air fuel ratio control, the air fuel ratio is forcibly regulated to become lean or rich by the ECM. If the ECM detects a malfunction, a DTC is stored.
Abnormal Voltage Output of Heated Oxygen Sensor (DTCs P013613 and P015613)
While the ECM is performing active air fuel ratio control, the air fuel ratio is forcibly regulated to become rich or lean. If the sensor is not functioning properly, the voltage output variation is small. For example, when the heated oxygen sensor voltage does not increase to 0.71 V or higher during active air fuel ratio control, the ECM determines that the sensor voltage output is abnormal and stores DTC P013613 or P015613.
Open in Heated Oxygen Sensor Circuit (DTCs P013617 and P015617)
During active air fuel ratio control, the ECM calculates the Oxygen Storage Capacity (OSC)* of the Three-Way Catalytic Converter (TWC) by forcibly regulating the air fuel ratio to become rich or lean.
If the heated oxygen sensor has an open circuit, or the voltage output of the sensor noticeably decreases, the OSC indicates an extraordinarily high value. Even if the ECM attempts to continue regulating the air fuel ratio to become rich or lean, the heated oxygen sensor output does not change.
While performing active air fuel ratio control, when the target air fuel ratio is rich and the heated oxygen sensor voltage output is less than 0.21 V (lean), the ECM interprets this as an abnormally low sensor output voltage and stores DTC P013617 or P015617.
HINT:
*: The TWC has the capability to store oxygen. The OSC and the emission purification capacity of the TWC are mutually related. The ECM determines whether the catalyst has deteriorated based on the calculated OSC value.
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High or Low Impedance of Heated Oxygen Sensor (DTCs P013611 and P015611 or P013614 and P015614)
During normal air fuel ratio feedback control, there are small variations in the exhaust gas oxygen concentration. In order to continuously monitor the slight variation of the heated oxygen sensor signal while the engine is running, the impedance* of the sensor is measured by the ECM. The ECM determines that there is a malfunction in the sensor when the measured impedance deviates from the standard range.
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*: The effective resistance in an alternating current electrical circuit.
HINT:
- The impedance cannot be measured using an ohmmeter.
- DTC P013611 or P015611 indicates the deterioration of the heated oxygen sensor. The ECM stores the DTC by calculating the impedance of the sensor when the typical enabling conditions are satisfied (2 driving cycles).
- DTC P013614 or P015614 indicates an open or short circuit in the heated oxygen sensor (2 driving cycles). The ECM stores the DTC when the impedance of the sensor exceeds the threshold 15 kΩ.
Extremely High Output Voltage of Heated Oxygen Sensor (DTCs P013615 and P015615)
The ECM continuously monitors the heated oxygen sensor output voltage while the engine is running.
DTC P013615 or P015615 is stored if the heated oxygen sensor voltage output is 1.2 V or higher for 10 seconds or more.
Abnormal Voltage Output of Heated Oxygen Sensor During Fuel-cut (DTCs P013623 and P015623)
The sensor output voltage drops to less than 0.2 V (extremely lean status) immediately when the vehicle decelerates and fuel cut is operating. If the voltage does not drop to less than 0.2 V for 7 seconds or more, the ECM determines that the sensor response has deteriorated, illuminates the MIL and stores a DTC.
Abnormal Voltage Output of Heated Oxygen Sensor During Fuel-cut from Rich Condition (DTCs P013A00 and P013C00)
If the sensor output voltage does not drop from 0.35 to 0.2 V immediately when the vehicle decelerates and fuel cut is operating, the ECM illuminates the MIL and stores a DTC.
MONITOR STRATEGY
| Related DTCs | P0136: Heated oxygen sensor (bank 1) voltage check (voltage malfunction) P0136: Heated oxygen sensor (bank 1) circuit continuity check (circuit short) P0137: Heated oxygen sensor (bank 1) voltage check (low voltage) P0137: Heated oxygen sensor (bank 1) circuit continuity check (circuit open) P0138: Heated oxygen sensor (bank 1) circuit continuity check (out of range) P0139: Heated oxygen sensor (bank 1) response rate during fuel cut P013A: Heated oxygen sensor (bank 1) response rate during fuel cut from rich condition P013C: Heated oxygen sensor (bank 2) response rate during fuel cut from rich condition P0156: Heated oxygen sensor (bank 2) voltage check (voltage malfunction) P0156: Heated oxygen sensor (bank 2) circuit continuity check (circuit short) P0157: Heated oxygen sensor (bank 2) voltage check (low voltage) P0157: Heated oxygen sensor (bank 2) circuit continuity check (circuit open) P0158: Heated oxygen sensor (bank 2) circuit continuity check (out of range) P0159: Heated oxygen sensor (bank 2) response rate during fuel cut |
| Required Sensors/Components (Main) | Heated oxygen sensor (sensor 2) |
| Required Sensors/Components (Related) | Crankshaft position sensor Engine coolant temperature sensor Mass air flow meter sub-assembly Throttle position sensor Air fuel ratio sensor |
| Frequency of Operation | Once per driving cycle: Active air fuel ratio control detection, heated oxygen sensor abnormal voltage during fuel cut. Continuous: Other |
| Duration | 20 seconds: Heated oxygen sensor voltage check 30 seconds: Heated oxygen sensor circuit continuity check (circuit short) 90 seconds: Heated oxygen sensor circuit continuity check (circuit open) 10 seconds: Heated oxygen sensor circuit continuity check (out of range) 7 seconds: Heated oxygen sensor response rate during fuel cut, Heated oxygen sensor response rate during fuel cut from rich condition |
| MIL Operation | 2 driving cycles: P0136, P0137, P0138, P0139, P0156, P0157, P0158 and P0159 Immediate: P013A and P013C |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All| 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) P0037, P0038, P0057, P0058, P0141, P0161, P102D, P105D (Heated oxygen sensor heater) P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side)) P0101, P0102, P0103 (Mass air flow meter) P0111, P0112, P0113 (Intake air temperature sensor) P0116, P0117, P0118 (Engine coolant temperature sensor) P011B (Engine coolant temperature/intake air temperature sensor correlation) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0128 (Thermostat) P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air fuel ratio sensor) P0171, P0172, P0174, P0175 (Fuel system) P0201, P0202, P0203, P0204, P0205, P0206, P062D, P21CF, P21D0, P21D1, P21D2, P21D3, P21D4 (Fuel injector) P0300 - P0306 (Misfire) P0327, P0328, P0332, P0333 (Knock control sensor) 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) P0657, P2102, P2103, P2111, P2112, P2119 (Throttle actuator) 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) P1235 (High pressure fuel pump circuit) |
| Battery voltage | 11 V or higher |
| Intake air temperature (for mass air flow meter sub-assembly) | -10°C (14°F) or higher |
| Engine coolant temperature | 75°C (167°F) or higher |
| Atmospheric pressure | 76 kPa(abs) [11 psi(abs)] or higher |
| Idling | Off |
| Engine speed | Less than 3500 rpm |
| Air fuel ratio sensor status | Activated |
| Fuel system status | Closed loop |
| Engine load | 10% or higher, and less than 100% |
| Battery voltage | 11 V or higher |
| Estimated heated oxygen sensor temperature | Less than 700°C (1292°F) |
| ECM monitor | Completed |
| DTC P0607 | Not set |
| Battery voltage | 11 V or higher |
| Estimated heated oxygen sensor temperature | 450°C (842°F) or higher, and less than 750°C (1382°F) |
| DTC P0607 | Not set |
| Battery voltage | 11 V or higher |
| Time after engine start | 2 seconds or more |
| Battery voltage | 11 V or higher |
| Engine coolant temperature | 75°C (167°F) or higher |
| Estimate catalyst temperature | 400°C (752°F) or higher |
| Fuel cut | On |
| Battery voltage | 11 V or higher |
| Engine coolant temperature | 75°C (167°F) or higher |
| Estimate catalyst temperature | 400°C (752°F) or higher |
| Fuel cut | On |
TYPICAL MALFUNCTION THRESHOLDS
P0136 and P0156: Heated Oxygen Sensor Voltage Check (Voltage Malfunction)| All of the following conditions (a), (b) and (c) met | - |
| (a) OSC (Oxygen Storage Capacity of Catalyst) | 2 g or more |
| (b) Commanded air fuel ratio | 14.3 or less |
| (c) Heated oxygen sensor (sensor 2) voltage | 0.21 V or higher, and less than 0.71 V |
| All of the following conditions (a), (b) and (c) met | - |
| (a) OSC (Oxygen Storage Capacity) of catalyst | 2 g or more |
| (b) Commanded air fuel ratio | 14.3 or less |
| (c) Heated oxygen sensor voltage | Less than 0.21 V |
| Duration of following condition | 30 seconds or more |
| Heated oxygen sensor impedance | Less than 5 Ω |
| Duration of following condition | 90 seconds or more |
| Heated oxygen sensor impedance | 15 kΩ or higher |
| Duration of following condition | 10 seconds or more |
| Heated oxygen sensor voltage | 1.2 V or higher |
| Duration until heated oxygen sensor voltage drops to 0.2 V during fuel cut | 7 seconds or more |
| Duration that heated oxygen sensor voltage drops from 0.35 to 0.2 V during fuel cut (Normalized) | 1 or more |
MONITOR RESULT
Refer to detailed information in Checking Monitor Status.
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| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $02 | $08 | Multiply by 0.001 | V | Maximum sensor voltage |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $02 | $8D | Multiply by 0.001 | Seconds | Duration that sensor voltage drops to 0.2 V during fuel-cut |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $02 | $8F | Multiply by 0.0003 | No dimension | Maximum oxygen storage capacity |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $02 | $90 | Multiply by 0.001 | No dimension | Response rate during fuel cut from rich condition (Normalization) |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $06 | $90 | Multiply by 0.001 | No dimension | Response rate during fuel cut from rich condition (Normalization) |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $06 | $08 | Multiply by 0.001 | V | Maximum sensor voltage |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $06 | $8D | Multiply by 0.001 | Seconds | Duration that sensor voltage drops to 0.2 V during fuel-cut |
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $06 | $8F | Multiply by 0.0003 | No dimension | Maximum oxygen storage capacity |
CONFIRMATION DRIVING PATTERN
HINT:
- This confirmation driving pattern is used in the "Perform Confirmation Driving Pattern" procedure of the following diagnostic troubleshooting procedure.
- Performing this confirmation driving pattern will activate the heated oxygen sensor monitor (The catalyst monitor is performed simultaneously). This is very useful for verifying the completion of a repair.
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- 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 reaches 75°C (167°F) or higher [B].
-
With the shift lever in D, drive the vehicle at 75 to 120 km/h (47 to 75 mph) for 10 minutes or more [C].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Enter the following menus: Powertrain / Engine / Trouble Codes [D].
-
Read the pending DTCs.
HINT:
- 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: P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617.
-
Check the DTC judgment result.
Techstream 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
HINT:
- 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, perform steps [C] through [D] again.
-
[B] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
- 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).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Monitor / Current Monitor.
- Check that Catalyst Efficiency / Current is Incomplete.
-
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the shift lever in P [A].
HINT:
In order to keep the idling stable, turn off the A/C and all other electric loads and do not perform any shift operations.
-
Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [B].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Drive the vehicle while keeping the engine load as constant as possible.
-
With the shift lever in S, drive the vehicle at 60 km/h (37 mph), and then decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / O2 Sensor / RL F/C B1S2, RL F/C B2S2 [D].
-
Check the Test Value for RL F/C B1S2, RL F/C B2S2.
HINT:
If Test Value displays 0, perform step [C] until it displays a value larger than 0, as the O2 sensor monitor is not finished.
- Repeat step [C] 2 times or more in one driving cycle.
- Enter the following menus: Powertrain / Engine / Trouble Codes.
-
Read the pending DTCs [D].
HINT:
- 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: P013623, P013A00, P013C00 or P015623.
-
Check the DTC judgment result.
Techstream 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
HINT:
- 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, drive the vehicle with the shift lever in S, and then perform step [C] again.
-
[A] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.
- Connect the Techstream to the DLC3.
- Start the engine.
- Turn the Techstream on.
- Warm up the engine and run the engine at an engine speed of 2500 rpm for approximately 90 seconds.
- Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2 or A/F (O2) Sensor Voltage B2S1 and O2 Sensor Voltage B2S2.
- Perform the Active Test with the engine idling (change the fuel injection volume).
- Monitor the output voltages of the air fuel ratio and heated oxygen sensors (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%.
- Each sensor reacts in accordance with increases and decreases in the fuel injection volume.
| 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 |
NOTICE:
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.
- Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
- To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2 or A/F (O2) Sensor Voltage B2S1 and O2 Sensor Voltage B2S2; and then press the graph button on the Data List view.
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.
- Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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. | READ OUTPUT DTC |
(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 |
|---|---|
| P013615 or P015615 is output | A |
| P013614, P013617, P015614 or P015617 is output | B |
| P013611, P013613, P015611 or P015613 is output | C |
| P013623, P013A00, P013C00 or P015623 is output | D |
| P013611, P013613, P013614, P013615, P013617, P013623, P013A00, P013C00, P015611, P015613, P015614, P015615, P015617 or P015623 and other DTCs are output | E |
HINT:
If any DTCs other than P013611, P013613, P013614, P013615, P013617, P013623, P013A00, P013C00, P015611, P015613, P015614, P015615, P015617 or P015623 are output, troubleshoot those DTCs first.
| B | .gif) | GO TO STEP 9 |
| C | | GO TO STEP 4 |
| D | | GO TO STEP 15 |
| E | | GO TO DTC CHART |
|
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| 2. | INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) |
| *a | Component without harness connected (Heated Oxygen Sensor) | *b | Bank 1 |
| *c | Bank 2 | - | - |
(a) Disconnect the heated oxygen sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 2 (+B) - 4 (E2) | Always | 10 kΩ or higher |
| 2 (+B) - 3 (OX1B) | Always | 10 kΩ or higher |
| 2 (+B) - 4 (E2) | Always | 10 kΩ or higher |
| 2 (+B) - 3 (OX2B) | Always | 10 kΩ or higher |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
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| NG | | REPLACE HEATED OXYGEN SENSOR |
|
| 3. | CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) |
(a) Turn the engine switch off and wait for 5 minutes or more.
(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 |
|---|---|---|
| C32-50 (HT1B) - C32-93 (OX1B) | Always | 10 kΩ or higher |
| C32-16 (HT2B) - C32-91 (OX2B) | Always | 10 kΩ or higher |
| OK | | REPLACE ECM |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) |
| 4. | 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) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / Coolant Temperature, O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Injection Volume for A/F Sensor |
| Data List Display |
|---|
| Coolant Temperature |
| O2 Sensor Voltage B1S2 |
| O2 Sensor Voltage B2S2 |
(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of heated oxygen sensor (O2 Sensor Voltage B1S2, O2 Sensor Voltage B2S2) displayed on the Techstream.
HINT:
- The Active Test "Control the Injection Volume for A/F Sensor" can be used to lower the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
- The heated oxygen sensor has a maximum output delay of approximately 20 seconds.
Standard voltage:
Fluctuates between 0.4 V or less, and 0.55 V or higher.
| NG | | GO TO STEP 9 |
|
| 5. | 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) 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 |
(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of air fuel ratio sensor (A/F (O2) Sensor Voltage B1S1, A/F (O2) Sensor Voltage B2S1) and heated oxygen sensor (O2 Sensor Voltage B1S2, O2 Sensor Voltage B2S2) displayed on the Techstream.
HINT:
- The Active Test "Control the Injection Volume for A/F Sensor" can be used to lower the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
- The air fuel ratio sensor is displayed as A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1, and the heated oxygen sensor is displayed as O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2 on the Techstream.
- 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) | Voltage Variation | Proceed to |
|---|---|---|
| A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1 (Air fuel ratio) | Alternates between higher and less than 3.3 V | OK |
| Remains at higher than 3.3 V | NG | |
| Remains at less than 3.3 V |
HINT:
A normal heated oxygen sensor voltage (O2 Sensor Voltage B1S2 or O2 Sensor Voltage B2S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage (A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1) remains at either less or higher than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning.
| OK | | CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (FUEL INJECTOR ASSEMBLY, FUEL SYSTEM, INTAKE SYSTEM, ETC.) |
|
| 6. | 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
|
| 7. | 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.
|
| 8. | CHECK WHETHER DTC OUTPUT RECURS (DTC P013611, P013613, P015611 OR P015613) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Powertrain > Engine > Utility| Tester Display |
|---|
| All Readiness |
(c) Input the DTC: P013611, P013613, P015611 or P015613.
(d) Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.
| Result | Proceed to |
|---|---|
| NORMAL (DTCs are not output) | A |
| ABNORMAL (DTC P013611, P013613, P015611 or P015613 is output) | B |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| A | | END |
| B | | REPLACE HEATED OXYGEN SENSOR |
| 9. | CHECK FOR EXHAUST GAS LEAK |
(a) Check for exhaust gas leaks.
OK:
No gas leaks in exhaust system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system.
Click here
| NG | | REPAIR OR REPLACE EXHAUST SYSTEM |
|
| 10. | INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) |
(a) Inspect the heated oxygen sensor.
Click here
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| NG | | REPLACE HEATED OXYGEN SENSOR |
|
| 11. | CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) |
(a) Disconnect the heated oxygen 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 |
|---|---|---|
| C28-1 (HT1B) - C32-50 (HT1B) | Always | Below 1 Ω |
| C28-3 (OX1B) - C32-93 (OX1B) | Always | Below 1 Ω |
| C28-4 (E2) - C32-94 (EX1B) | Always | Below 1 Ω |
| C29-1 (HT2B) - C32-16 (HT2B) | Always | Below 1 Ω |
| C29-3 (OX2B) - C32-91 (OX2B) | Always | Below 1 Ω |
| C29-4 (E2) - C32-92 (EX2B) | Always | Below 1 Ω |
| C28-1 (HT1B) or C32-50 (HT1B) - Body ground and other terminals | Always | 10 kΩ or higher |
| C28-3 (OX1B) or C32-93 (OX1B) - Body ground and other terminals | Always | 10 kΩ or higher |
| C29-1 (HT2B) or C32-16 (HT2B) - Body ground and other terminals | Always | 10 kΩ or higher |
| C29-3 (OX2B) or C32-91 (OX2B) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 12. | REPLACE HEATED OXYGEN SENSOR |
(a) Replace the heated oxygen sensor.
Click here
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
|
| 13. | 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.
|
| 14. | CHECK WHETHER DTC OUTPUT RECURS (DTC P013611, P013613, P013614, P013617, P015611, P015613, P015614 OR P015617) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Powertrain > Engine > Utility| Tester Display |
|---|
| All Readiness |
(c) Input the DTC: P013611, P013613, P013614, P013617, P015611, P015613, P015614 or P015617.
(d) Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.
| Result | Proceed to |
|---|---|
| NORMAL (DTCs are not output) | A |
| ABNORMAL (DTC P013611, P013613, P013614, P013617, P015611, P015613, P015614 or P015617 is output) | B |
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here
| A | | END |
| B | | REPLACE AIR FUEL RATIO SENSOR |
| 15. | CHECK FOR EXHAUST GAS LEAK |
(a) Check for exhaust gas leaks.
OK:
No gas leaks in exhaust system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system.
Click here
| NG | | REPAIR OR REPLACE EXHAUST SYSTEM |
|
| 16. | CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) |
(a) Turn the engine switch off and wait for 5 minutes or more.
(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 |
|---|---|---|
| C32-50 (HT1B) - C32-93 (OX1B) | Always | 10 kΩ or higher |
| C32-16 (HT2B) - C32-91 (OX2B) | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM) |
|
| 17. | 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.
|
| 18. | CHECK WHETHER DTC OUTPUT RECURS (DTC P013623, P013A00, P013C00 OR P015623) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Powertrain > Engine > Utility| Tester Display |
|---|
| All Readiness |
(c) Input the DTC: P013623, P013A00, P013C00 or P015623.
(d) Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.
| Result | Proceed to |
|---|---|
| NORMAL (DTCs are not output) | A |
| ABNORMAL (DTC P013623, P013A00, P013C00 or P015623 is output) | B |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| A | | CHECK FOR INTERMITTENT PROBLEMS |
| B | | REPLACE HEATED OXYGEN SENSOR |
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