Component Inspection

REAR 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 SEN-B1 (-B2)" as the monitor item with CONSULT.
(3) Check "RR O2 SEN-B1 (-B2)" at idle speed when adjusting "FUEL INJECTION" to ±25%.
"RR O2 SEN-B1 (-B2)" should be above 0.48 V at least once when the "FUEL INJECTION" is +25%.
"RR O2 SEN-B1 (-B2)" should be below 0.43 V at least once when the "FUEL INJECTION" is -25%.








Without CONSULT
(1) Start engine and warm it up to normal operating temperature.
(2) Set voltmeter probes between ECM terminal 56 (right bank sensor signal) or 57 (left bank sensor signal) and engine ground.





(3) Check the voltage when racing 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 during this procedure.
If the voltage is above 0.48 V at step 3, step 4 is not necessary.
(4) 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 during this procedure.

CAUTION: Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.