Toyota 3S-GE Repair Manual page 300

EG-286 _
ENGINE EFI SYSTEM
SW20
Voltmeter
v f J
Check Connector
E1
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VF'I
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Warm up the oxygen sensor with the engine at
Sm, mmeter OXYGEN SENSOR M
OXYGEN SENSOR INSPECTION
1. WARM UP ENGINE
_ _ Allow the engine to reach normal operating tempera-
Cl""°" C°""e"'°' 2 INr;PECT FEEDBACK VOLTAGE
_'_V_ e —r_ —,—, Sif;/' -
EG Connect the positive (+) probe of a voltmeter to
L ' 05;," -I terminal VF1 of the check connector, and negative
E1 W1 (—) probe to terminal E1. Perform the test as follows:
2,500 rpm for approx. 90 seconds.
connector.
SST 09843-18020
Maintain engine speed at 2,500 rpm.
_ I
Using SST, connect terminals TE1 and E1 of the check < Replace the ECU-
Zero again After replacing
the oxygen sensor
Check the number of times the voltmeter needle fluctuates in 10 seconds.
l Less than 8 times
Warm up the oxygen sensor with the engine at
2,500 rpm for approx. 90 seconds. Maintain engine
speed at 2,500 rpm.
Check the number of times the voltmeter needle
fluctuates in I0 seconds.
8 times Zero
or more
8 times or more
l Less than 8 times
Maintain engine speed at 2,500 rpm.
Disconnect terminals TE1 and E1 ofthe check connector.
I V Y
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CONTINUED ON PAGE EG-287
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V05-430