2NZ-FE ENGINE CONTROL SFI SYSTEM P0132 Oxygen Sensor Circuit High Voltage Bank1 Sensor1
DESCRIPTION
Refer to DTC P0031.
Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>P0031
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P0132 | Oxygen Sensor Circuit High Voltage Bank1 Sensor1 | Heated oxygen sensor voltage output exceeds 1.2 V for more than 10 seconds (2 trip detection logic). | ·
Short in heated oxygen sensor circuit ·
Heated oxygen sensor ·
ECM internal circuit malfunction |
Comes on | DTC stored |
MONITOR DESCRIPTION
The ECM uses the heated oxygen sensor information to regulate the air fuel ratio close to a stoichiometric air fuel ratio. This maximizes the catalytic converter's ability to purify the exhaust gases. The heated oxygen sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM.
The inner surface of the sensor element is exposed to outside air. The outer surface of the sensor element is exposed to the exhaust gas. The sensor element is made of platinum coated zirconia and an integrated heating element. The heated oxygen sensor's output voltage changes suddenly in the vicinity of the stoichiometric air fuel ratio. The heated oxygen sensor generates output voltage between 0 V and 1 V in response to the oxygen concentration in the exhaust gas. When the front heated oxygen sensor voltage is 0.45 V or more, the ECM judges that the air fuel ratio is rich. When it is 0.45 V or less, the ECM judges that the air fuel ratio is lean.
If the front heated oxygen sensor output voltage exceeds 1.2 V for 10 seconds, the ECM illuminates the MIL (2 trip detection logic) and stores DTC P0132.
MONITOR STRATEGY
| Required Sensors/Components (Main) | Heated oxygen sensor |
| Required Sensors/Components (Related) | Crankshaft position sensor
Vehicle speed sensor |
| Frequency of Operation | Once per driving cycle |
TYPICAL ENABLING CONDITIONS
| Engine | Running |
| Battery voltage | 11 V or higher |
TYPICAL MALFUNCTION THRESHOLDS
| Heated oxygen sensor voltage | 1.2 V or higher |
COMPONENT OPERATING RANGE
| Heated oxygen sensor voltage | Fluctuates for a second |
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS 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 and turn the GTS on.
Start the engine.
Idle the engine for 10 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
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: P0132.
Check the DTC judgment result.
| GTS 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, perform the Confirmation Driving Pattern and check the DTC judgment result again.
WIRING DIAGRAM
Refer to DTC P0031.
Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>P0031
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 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 GTS.
- 1.
Connect the GTS to the DLC3.
2.Start the engine.
3.Turn the GTS on.
4.Warm up the engine and run the engine at an engine speed of 2500 rpm for approximately 90 seconds.
5.Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / O2S B1S1.
6.Perform the Active Test operation with the engine idling (press the 12.5% or -12.5% button to change the fuel injection volume).
7.Monitor the output voltages of the heated oxygen sensor (O2S B1S1) displayed on the GTS.
- 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.
·Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage output of the heated oxygen sensor.
| GTS Display
(Sensor) |
Injection Volume | Status | Voltage |
|---|---|---|---|
| O2S B1S1
(Heated oxygen sensor) |
12.5% | Rich | Higher than 0.5 V |
| -12.5% | Lean | Below 0.4 V |
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
- HINT:
-
Read freeze frame data using the GTS. 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
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- Result:
Result Proceed to DTC P0132 and other DTCs are output A DTC P0132 is output B
- HINT:
-
If any DTCs other than P0132 is output, troubleshoot those DTCs first.
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / O2S B1S1.
- Powertrain > Engine and ECT > Data List
-
Tester Display O2S B1S1 - 50003 234 42
Allow the engine to run at 2500 rpm for 3 minutes.
Depress the accelerator pedal quickly until the engine rpm reaches 4000 rpm 3 times.
- Result:
Result Proceed to Higher than 1.0 V A 1.0 V or less B
A
B
Disconnect the heated oxygen sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition B58-1 (HT1A) - B58-3 (OX1A) Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Inspect the heated oxygen sensor.
Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>HEATED OXYGEN SENSOR>INSPECTION
- Result:
Proceed to OK NG
OK
NG
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
- Result:
Proceed to NEXT
NEXT
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- Result:
Result Proceed to DTC P0132 is output A DTCs are not output B
A
B