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oxygense .pdf


Original filename: oxygense.pdf
Title: Document:
Author: wvpress1

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EG1–403
3S–GTE ENGINE



SMPI SYSTEM

OXYGEN SENSOR

OXYGEN SENSOR INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating
temperature.
2. INSPECT FEEDBACK VOLTAGE
Connect the positive (+) probe of a voltmeter to
terminal VF1 of the data link connector 1, and nega–
tive (–) probe to terminal
E1. Perform the test as
follows:
Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds.

Using SST, connect terminals TO and E1 of the data link
connector 1.
SST 09843–18020
And maintain engine speed at 2,500 rpm.

Replace the PCM E .
Zero again. After replacing
the oxygen sensor

Check the number of times the voltmeter needle fluctuates in 10 seconds.
Less than 8 times
Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds. And maintain engine speed
at 2,500 rpm.

CONTINUED ON PAGE EG1–404

8 times
or more

Normal

Zero

EG1–404
3S–GTE ENGINE



SMPI SYSTEM

CONTINUED FROM PAGE EG1–403

8 times or more
Check the number of times the voltmeter needle
fluctuates in 10 seconds.

Zero

Less than 8 times

Disconnect terminals TE1 and E1 of the data link connec–
tor 1. And maintain engine speed at 2,500 rpm.

Measure voltage between terminals VF1 and E1.
More than 0 V
Read and record diagnostic trouble codes. (See page EG1–287)
Normal code, code
Nos.21, 25, and 26

Malfunction code(s)
(Ex. code Nos.21, 25 and 26)

Repair the relevant diagnostic trouble codes.
Malfunction code(s)
(Ex. code Nos.21, 25 and 26)
Read and record diagnostic trouble codes. (See page EG1–287)
Normal code,
code Nos.21 and 25
Disconnect terminals TE1 and E1 of the data link connector 1.
And maintain engine speed at 2,500 rpm.

Measure voltage between terminals VF1 and E1.

Disconnect the PCV hose.

Measure voltage between terminals VF1 and E1.
More than 0 V

Repair (Over rich)

CONTINUED ON PAGE EG1–405

EG1–405
3S–GTE ENGINE



SMPI SYSTEM

CONTINUED FROM PAGE EG1–404

Disconnect the ECTS connector and connect resistor with
a resistance of 4 – 8 k or send an equivalent simulation
signal.

Connector terminals TE1 and E1 of the data link connector 1.

Warm up the oxygen sensor with the engine at 2,500
rpm for approx. 90 seconds. And maintain engine speed
at 2,500 rpm.

Measure voltage between terminals VF1 and E1.

Replace the oxygen sensor.

Repair (Over lean)

3. INSPECT HEATER RESISTANCE OF OXYGEN
SENSOR
(a) Disconnect the oxygen sensor connector.
(b) Using an ohmmeter, measure the resistance between
terminals +B and HT.
Resistance:
5.1 – 6.3 0 at 20° C (68° F)

If resistance is not as specified, replace the oxygen
sensor.
(c) Reconnect the oxygen sensor connector.


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