Rear Heated Oxygen Sensor
COMPONENT INSPECTIONRear Heated Oxygen Sensor
With Consult
1) Start engine and warm it up to normal operating temperature.
2) Select "FUEL INJECTION" in "ACTIVE TEST" mode, and select "RR O2 SENSOR" as the monitor item with CONSULT.
3) Check "RR O2 SENSOR" at idle speed when adjusting "FUEL INJECTION" to ±25%.
"RR O2 SENSOR" should be above 0.48 V at least once when the "FUEL INJECTION" is +25%.
"RR O2 SENSOR" should be below 0.43 V at least once when the "FUEL INJECTION" is -25%.
OR
Without Consult
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminals (52) (sensor signal) and (43) (engine ground).
3) Check the voltage when revving up to 4,000 rpm under no load at least 10 times. (Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.48 V at least once.
If the voltage is above 0.48 V at step 3, step 4 is not necessary.
4) Check the voltage when racing up to 6,000 rpm under no load. Or keep vehicle at idling for 10 minutes, then check the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in 3rd gear position.
The voltage should be below 0.43 V at least once.