Oxygen Sensor - Toyota Celica Supra 1986 Service And Repair Manual

EFI SYSTEM - Electronic Control System
Fl -73
:v
Oxygen Sensor
INSPECTION OF FEEDBACK V OLT AGE IV•l
1. Warm up the engine.
2. Connect SST t o t:he engine service connector.
SST 09842-1 4010
3. Connect the voltmeter to the SST.
4 . W arm up the Oxygen sensor with the engine at 2,
500
rpm
for about
2
minut es.
Warm up the Oxygen eensor with the engine at
2,500
rpm fOf
approx. 90
seconds.
I
Short terminals T and
e,
of the aerviee connector.
c
Replace tho ECU
)
And maintain engine speed at 2. 500 rpm.
After replacing
the oxygen sensor
Check the numbe1 of times
the
voh:meter needle fluctuates in 10 seconds.
I
8
times
Zero
Less than 8 timee
or more
Warm up the Oxygen sensor with the engine at
Normel
)
2,600 rpm for approx. 90 seconds. and maintain
engine at
2.600
rpm.
Check the number of times the voltmeter
8
times or more
needle fluctuates in 10 .seconds.
Zero
Le.ss than 8 times
Unshor1
terminals T end E, of the servioee connector
And
maintain engine
speed at 2,500 rpm.
Measure voltage between terminals VF and
Et.
ov
More than
OV
I
Reed and record diagnostic codes
l
Normal code
Malfunction code(sl
and code 21
lex. code 211
<D
®
(Repair the relovent diagnostic code.
®
CONTINUED ON PAGE fl· 74
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