Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSCION2006XB L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORTESTING AND INSPECTIONHEATED OXYGEN SENSOR (FOR BANK 1 SENSOR 2)
2006 Scion xB L4-1.5L (1NZ-FE)
Heated Oxygen Sensor (For Bank 1 Sensor 2)
2006 Scion xB L4-1.5L (1NZ-FE)SECTION Heated Oxygen Sensor (For Bank 1 Sensor 2)
ON-VEHICLE INSPECTION
1. CHECK AIR-FUEL RATIO COMPENSATION SYSTEM
HINT: The system can also be checked by choosing "DATA MONITOR/O2SENSOR OUTPUT VOLTAGE" on the intelligent tester monitor.
a. Connect the intelligent tester to terminals E5-25 (OX1B) and E5-28 (E2) of the ECM.
NOTE: Connect test leads from the backside of the connector with the ECU connected.
b. Warm up the heated oxygen sensor at an engine speed of 2,500 rpm for approximately 2 minutes.
c. Check that the voltage varies between approximately 0 V and 1 V at an engine speed of 2,500 rpm.
OK:
The voltage varies more than 8 times in 10 seconds.
NOTE:
- Perform the check immediately after warming up the heated oxygen sensor.
- If the voltage variation could not be verified, warm up the heated oxygen sensor again.
2. INSPECT HEATED OXYGEN SENSOR
a. Disconnect the sensor connector.
b. Measure the resistance of the sensor.Standard resistance
If the result is not as specified, replace the sensor.
c. Connect the sensor connector.
1. CHECK AIR-FUEL RATIO COMPENSATION SYSTEM
HINT: The system can also be checked by choosing "DATA MONITOR/O2SENSOR OUTPUT VOLTAGE" on the intelligent tester monitor.
a. Connect the intelligent tester to terminals E5-25 (OX1B) and E5-28 (E2) of the ECM.
NOTE: Connect test leads from the backside of the connector with the ECU connected.
b. Warm up the heated oxygen sensor at an engine speed of 2,500 rpm for approximately 2 minutes.
c. Check that the voltage varies between approximately 0 V and 1 V at an engine speed of 2,500 rpm.
OK:
The voltage varies more than 8 times in 10 seconds.
NOTE:
- Perform the check immediately after warming up the heated oxygen sensor.
- If the voltage variation could not be verified, warm up the heated oxygen sensor again.
2. INSPECT HEATED OXYGEN SENSOR
a. Disconnect the sensor connector.
b. Measure the resistance of the sensor.Standard resistance
If the result is not as specified, replace the sensor.
c. Connect the sensor connector.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.