Oxygen Sensor Inspection; Inspect Heater Resistance Of Oxygen Sensor; Inspection Of Feedback Voltage (Vf1) - Toyota 22R-E Service Manual

EG1–212
Warm p the 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 oxygen sensor with the engine at 2,500
rpm for approx. 94 seconds. And maintain engine
speed at 2,500 rpm.
Check the number of times the voltometer needle
fluctuates in 10 seconds.
Disconnect terminals TE1 and E1 of the DLC
1. And maintain engine speed 2,500pm.
CONTINUED ON PAGE
EG1–213
ENGINE
OXYGEN SENSOR

OXYGEN SENSOR INSPECTION

1. INSPECT HEATER RESISTANCE OF OXYGEN
SENSOR
Using an ohmmeter, measure the resistance between
the terminals +B and HT.
Resistance: 5.1.–6.3 W at 20SC (68SF)
If the resistance is not as specified, replace the
oxygen sensor.

2. INSPECTION OF FEEDBACK VOLTAGE (VF1)

(a) Warm up the engine.
(b) Connect the voltmeter to the DLC1 terminals VF, and
E1.
HINT: Use SST when connecting between terminals
TE1 and E1 of the DLC1.
SST 09843–18020
Less than 6 times
Less than 6 times
– MFI SYSTEM
6 times o more
Zero
Replace the ECM.
After replacing
the oxygen
sensor
6 times
Zero
or more
NormaI