- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GH9U |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 03/2019] |
| Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0136-P0139,P013A; O2 (A/F) Sensor Circuit (Bank 1 Sensor 2); 2020 MY Corolla [01/2019 - 03/2019] | ||
|
DTC |
P0136 |
O2 (A/F) Sensor Circuit (Bank 1 Sensor 2) |
|
DTC |
P0137 |
Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2) |
|
DTC |
P0138 |
Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2) |
|
DTC |
P0139 |
Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2) |
|
DTC |
P013A |
Oxygen Sensor Slow Response - Rich to Lean Bank 1 Sensor 2 |
DESCRIPTION
Refer to DTC P0037.
Click here
![2020 MY Corolla [01/2019 - 03/2019]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0037,P0038,P0141,P102D; Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
|---|---|---|---|---|---|
|
P0136 |
O2 (A/F) Sensor Circuit (Bank 1 Sensor 2) |
Either of the following conditions is met:
|
|
Comes on |
DTC stored |
|
P0137 |
Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2) |
Either of the following conditions is met:
|
|
Comes on |
DTC stored |
|
P0138 |
Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2) |
Extremely high voltage (short):
|
|
Comes on |
DTC stored |
|
P0139 |
Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2) |
Heated oxygen sensor (sensor 2) voltage does not drop to less than 0.2 V immediately after fuel cut starts (2 trip detection logic) |
|
Comes on |
DTC stored |
|
P013A |
Oxygen Sensor Slow Response - Rich to Lean Bank 1 Sensor 2 |
Heated oxygen sensor (sensor 2) voltage does not drop from 0.35 V to 0.2 V immediately after fuel cut status (1 trip detection logic) |
|
Comes on |
DTC stored |
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 (DTC P0136)
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 P0136.
Open in Heated Oxygen Sensor Circuit (DTC P0137)
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 P0137.
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.
Click here
High or Low Impedance of Heated Oxygen Sensor (DTC P0136 or P0137)
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.
*: The effective resistance in an alternating current electrical circuit.
HINT:
- The impedance cannot be measured using an ohmmeter.
- DTC P0136 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 trip detection logic).
- DTC P0137 indicates an open or short circuit in the heated oxygen sensor (2 trip detection logic). The ECM stores the DTC when the impedance of the sensor exceeds the threshold 15 kΩ.
Extremely High Output Voltage of Heated Oxygen Sensor (DTC P0138)
The ECM continuously monitors the heated oxygen sensor output voltage while the engine is running.
DTC P0138 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 (DTC P0139)
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 system determines that the sensor response has deteriorated, illuminates the MIL and stores DTC P0139.
Abnormal Voltage Output of Heated Oxygen Sensor During Fuel-cut from Rich Condition (DTC P013A)
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 DTC P013A.
MONITOR STRATEGY
|
Related DTCs |
P0136: Heated oxygen sensor voltage check (voltage malfunction) P0136: Heated oxygen sensor circuit continuity check (circuit short) P0137: Heated oxygen sensor voltage check (low voltage) P0137: Heated oxygen sensor circuit continuity check (circuit open) P0138: Heated oxygen sensor circuit continuity check (out of range) P0139: Heated oxygen sensor response rate during fuel cut P013A: Heated oxygen sensor response rate during fuel cut from rich condition |
|
Required Sensors/Components (Main) |
Heated oxygen sensor |
|
Required Sensors/Components (Related) |
Crank 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 |
90 seconds: Heated oxygen sensor circuit continuity check (circuit open) 30 seconds: Heated oxygen sensor circuit continuity check (circuit short) 20 seconds: Heated oxygen sensor voltage check 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 and P0139 1 driving cycle: P013A |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Monitor runs whenever the following DTCs are not stored |
P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0031, P0032 (Air fuel ratio sensor heater) P0037, P0038 (Heated oxygen sensor heater) P0102, P0103 (Mass air flow meter) P0107, P0108 (Manifold absolute pressure) P0112, P0113 (Intake air temperature sensor) P0115, P0117, P0118 (Engine coolant temperature sensor) P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient engine coolant temperature for closed loop fuel control) P0128 (Thermostat) P014C, P014D, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor) P0171, P0172 (Fuel system) P0300, P0301, P0302, P0303, P0304 (Misfire) P0335 (Crank position sensor) P0340 (Cam position sensor) P0451, P0452, P0453 (EVAP system) P0500 (Vehicle speed sensor) P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance) |
P0136 and P0137: Heated Oxygen Sensor Voltage Check (Voltage Malfunction and Low Voltage)
|
Battery voltage |
11 V or higher |
|
Intake air temperature |
-10°C (14°F) or higher |
|
Engine coolant temperature |
73°C (163.4°F) or higher |
|
Atmospheric pressure |
76 kPa(abs) [11 psi(abs)] or higher |
|
Idling |
Off |
|
Engine speed |
Less than 4000 rpm |
|
Air fuel ratio sensor status |
Activated |
|
Fuel system status |
Closed loop |
|
Engine load |
10% or higher, and less than 80% |
|
Shift position |
3rd or higher (for CVT models) 4th or higher (for Manual Transaxle models) |
P0136: Heated Oxygen Sensor Circuit Continuity Check (Circuit Short)
|
Battery voltage |
11 V or higher |
|
Estimated sensor temperature |
Less than 700°C (1292°F) |
|
ECM monitor |
Completed |
|
DTC P0607 |
Not set |
P0137: Heated Oxygen Sensor Circuit Continuity Check (Circuit Open)
|
Battery voltage |
11 V or higher |
|
Estimated sensor temperature |
450°C (842°F) or higher, and less than 750°C (1382°F) |
|
DTC P0607 |
Not set |
P0138: Heated Oxygen Sensor Circuit Continuity Check (Out of Range)
|
Battery voltage |
11 V or higher |
|
Time after engine start |
2 seconds or more |
P0139: Heated Oxygen Sensor Response Rate During Fuel Cut
|
Engine coolant temperature |
73°C (163.4°F) or higher |
|
Catalyst temperature |
400°C (752°F) or higher |
|
Fuel cut |
On (for CVT models) |
P013A: Heated Oxygen Sensor Response Rate During Fuel Cut from Rich Condition
|
Battery voltage |
11 V or higher |
|
Engine coolant temperature |
73°C (163.4°F) or higher |
|
Catalyst temperature |
400°C (752°F) or higher |
|
Fuel cut |
On |
TYPICAL MALFUNCTION THRESHOLDS
P0136: Heated Oxygen Sensor Voltage Check (Voltage Malfunction)
|
All of following conditions (a), (b) and (c) met |
- |
|
(a) OSC (Oxygen Storage Capacity) of catalyst |
1.8 g or more |
|
(b) Commanded air fuel ratio |
14.3 or less |
|
(c) Heated oxygen sensor voltage |
0.21 V or higher, and less than 0.71 V |
P0137: Heated Oxygen Sensor Voltage Check (Low Voltage)
|
All of following conditions (a), (b) and (c) met |
- |
|
(a) OSC (Oxygen Storage Capacity) of catalyst |
1.8 g or more |
|
(b) Commanded air fuel ratio |
14.3 or less |
|
(c) Heated oxygen sensor voltage |
Less than 0.21 V |
P0136: Heated Oxygen Sensor Circuit Continuity Check (Circuit Short)
|
Duration of following condition |
30 seconds or more |
|
Heated oxygen sensor impedance |
Less than 5 Ω |
P0137: Heated Oxygen Sensor Circuit Continuity Check (Circuit Open)
|
Duration of following condition |
90 seconds or more |
|
Heated oxygen sensor impedance |
15 kΩ or higher |
P0138: Heated Oxygen Sensor Circuit Continuity Check (Out of Range)
|
Duration of following condition |
10 seconds or more |
|
Heated oxygen sensor voltage |
1.2 V or higher |
P0139: Heated Oxygen Sensor Response Rate During Fuel Cut
|
Duration until heated oxygen sensor voltage drops to 0.2 V during fuel cut |
7 seconds or more |
P013A: Heated Oxygen Sensor Response Rate During Fuel Cut from Rich Condition
|
Duration that rear heated oxygen sensor voltage drops from 0.35 V to 0.2 V during fuel cut (Normalized) |
1 second or more |
MONITOR RESULT
Refer to detailed information in Checking Monitor Status.
Click here
P0136: O2 Sensor / MAX OSC B1S2
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$02 |
$8F |
Multiply by 0.0003 |
No dimension |
Maximum oxygen storage capacity |
P0137: O2 Sensor / MAX VOL B1S2
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$02 |
$08 |
Multiply by 0.001 |
V |
Maximum sensor voltage |
P0139: O2 Sensor / F/C TIME B1S2
|
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 |
P013A: O2 Sensor / RL F/C B1S2
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$02 |
$90 |
Multiply by 0.001 |
No dimension |
Response rate during fuel cut from rich condition (Normalized) |
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.
P0136, P0137 and P0138
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON [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 or 4th gear or more, drive the vehicle at 60 to 120 km/h (37 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 and ECT / 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 and ECT / Utility / All Readiness.
- Input the DTC: P0136, P0137 or P0138.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform steps [C] through [D] again.
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
P0139 and P013A
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / 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 or neutral [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 B, 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 and ECT / Monitor / Current Monitor / O2 Sensor / RL F/C B1S2 [D].
-
Check the Test Value for RL F/C B1S2.
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 and ECT / Trouble Codes / Pending.
-
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 and ECT / Utility / All Readiness.
- Input the DTC: P0139 or P013A.
-
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
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, drive the vehicle with the shift lever in B or 2nd gear, and then perform step [C] again.
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
Refer to DTC P0037.
Click here
CAUTION / NOTICE / HINT
HINT:
Malfunctioning areas can be identified by performing the Active Test "Control the Injection Volume for A/F Sensor". This Active Test can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.
The following procedure describe how to perform the Active Test "Control the Injection Volume for A/F Sensor" using the Techstream.
- Connect the Techstream to the DLC3.
- Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
- Turn the Techstream on.
- Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
- Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / Data List / AFS Voltage B1S1 and O2S B1S2.
- 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 (AFS Voltage B1S1 and O2S B1S2) 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 increase the injection volume by 12.5%.
- Each sensor reacts in accordance with increases and decreases in the fuel injection volume.
Standard
|
Techstream Display (Sensor) |
Injection Volume |
Status |
Voltage |
|---|---|---|---|
|
AFS Voltage B1S1 (Air fuel ratio) |
12.5% |
Rich |
Below 3.1 V |
|
-12.5% |
Lean |
Higher than 3.4 V |
|
|
O2S B1S2 (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.
Performing the Active Test "Control the Injection Volume for A/F Sensor" allows the output voltage of the air fuel ratio sensor and heated oxygen sensor to be checked and graphed.
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- 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. 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. |
READ OUTPUT DTC (DTC P0136, P0137, P0138, P0139 OR P013A) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P0138 is output |
A |
|
DTC P0137 is output |
B |
|
DTC P0136 is output |
C |
|
DTC P0139 or P013A is output |
D |
|
DTC P0136, P0137, P0138, P0139 or P013A and other DTCs are output |
E |
HINT:
If any DTCs other than P0136, P0137, P0138, P0139 or P013A are output, troubleshoot those DTCs first.
| B |
|
| C |
|
| D |
|
| E |
|
|
|
2. |
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) |
|
*a |
Component without harness connected (Heated Oxygen Sensor) |
(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) - 3 (OX1B) |
Always |
10 kΩ or higher |
|
2 (+B) - 4 (E2) |
Always |
10 kΩ or higher |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) |
(a) Turn the ignition switch to 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 |
|---|---|---|
|
C77-56 (HT1B) - C77-99 (OX1B) |
Always |
10 kΩ or higher |
| OK |
|
| 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) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / Data List / Coolant Temp and O2S B1S2.
Powertrain > Engine and ECT > Active Test
|
Active Test Display |
|---|
|
Control the Injection Volume for A/F Sensor |
|
Data List Display |
|---|
|
Coolant Temp |
|
O2S B1S2 |
(e) Change the fuel injection volume using the Techstream, and monitor the voltage output of the heated oxygen sensor 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 increase 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 |
|
|
|
5. |
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
(c) Turn the Techstream on.
(d) Warm up the air fuel ratio sensor at an engine speed of 2500 rpm for 90 seconds.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / Data List / Coolant Temp, AFS Voltage B1S1 and O2S B1S2.
Powertrain > Engine and ECT > Active Test
|
Active Test Display |
|---|
|
Control the Injection Volume for A/F Sensor |
|
Data List Display |
|---|
|
Coolant Temp |
|
AFS Voltage B1S1 |
|
O2S B1S2 |
(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of the air fuel ratio and heated oxygen sensors 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 increase 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.
|
Techstream Display (Sensor) |
Voltage Variation |
Proceed to |
|---|---|---|
|
AFS Voltage B1S1 (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 (O2S B1S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage (AFS Voltage B1S1) 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 |
|
|
|
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 ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
8. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Powertrain > Engine and ECT > Utility
|
Tester Display |
|---|
|
All Readiness |
(c) Input the DTC: P0136.
(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 P0136 is output) |
B |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| A |
|
END |
| B |
|
|
9. |
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 GAS LEAK POINT |
|
|
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 |
|
|
|
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 |
|---|---|---|
|
C57-1 (HT1B) - C77-56 (HT1B) |
Always |
Below 1 Ω |
|
C57-3 (OX1B) - C77-99 (OX1B) |
Always |
Below 1 Ω |
|
C57-4 (E2) - C77-131 (EX1B) |
Always |
Below 1 Ω |
|
C57-1 (HT1B) or C77-56 (HT1B) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C57-3 (OX1B) or C77-99 (OX1B) - 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 ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
14. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136 OR P0137) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Powertrain > Engine and ECT > Utility
|
Tester Display |
|---|
|
All Readiness |
(c) Input the DTC: P0136 or P0137.
(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 |
|---|---|
|
ABNORMAL (DTC P0136 or P0137 is output) |
A |
|
NORMAL (DTCs are not output) |
B |
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here
| A |
|
| B |
|
END |
|
15. |
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 GAS LEAK POINT |
|
|
16. |
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) |
(a) Turn the ignition 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 |
|---|---|---|
|
C77-56 (HT1B) - C77-99 (OX1B) |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
18. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0139 OR P013A) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Powertrain > Engine and ECT > Utility
|
Tester Display |
|---|
|
All Readiness |
(c) Input the DTC: P0139 or P013A.
(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 P0139 or P013A is output) |
B |
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| A |
|
| B |
|
|
|