Heated Oxygen Sensor Inspection; Inspect Heater Resistance Of Heated Oxygen Sensor - Toyota 22R-E Service Manual

EG2–252
Warm up the heated oxygen sensor with the engine
at 2,500 rpm for approx. 90 seconds.
Connect terminals TE1 and E1 of the DLC1.
And maintain engine speed at 2,500 rpm.
Check the number of times the voltmeter needle fluctuates in 10 seconds.
Warm up the heated oxygen sensor with the engine
at 2,500 rpm for approx. 90 seconds. And maintain
engine speed at 2,500 rpm.
Check that the number of times the voltmeter
needle fluctuates in 10 seconds.
ENGINE
HEATED OXYGEN SENSOR

HEATED OXYGEN SENSOR INSPECTION

1. INSPECT HEATER RESISTANCE OF HEATED
OXYGEN SENSOR
Using an ohmmeter, measure the resistance between
the terminals +B and HT.
Resistance:
California 2WD only
4.5 – 6.0 Ω at 23SC (73SF)
Others
5.1 – 6.3 Ω at 20SC (68S F)
If the resistance is not as specified, replace the heated
oxygen sensor.
2. INSPECTION OF FEEDBACK VOLTAGE (VF1)
(a) Warm up the engine.
(b) Connect the voltmeter to the DLC1 terminals VF1 and
HINT: Use SST when connecting between terminals
TE1 and E1 of the DLC1.
SST 09843–18020
Less than 8 times
Less than 8 times
CONTINUED ON PAGE EG2–253
– MFI SYSTEM
E1.
8 times or more
Zero
Replace the ECM.
After replacing
the heated oxygen
sensor
8 times or more Zero
Normal