Toyota 3VZ–FE Troubleshooting Manual page 382

INSPECTION PROCEDURE
1
Check voltage between terminals VF1, VF2 and E1 of data link connector 1.
NG
Type I
2
Check voltage between terminals OX1, OX2 and E1 of data link connector 1.
NG
ENGINE TROUBLESHOOTING
P
C
NG
Go to step .
Type II
P
C
OK
Hint
Go to step .
OK
– CIRCUIT INSPECTION
1. Warm up engine at normal operating temperature.
2. Connect terminals TE1 and E1 of data link connec-
tor 1.
3. Connect positive probe to terminal VF1, VF2 and
negative probe to terminal E1 of data link connec-
tor.
1. Warm up the oxygen sensor by running engine at
2,500 rpm for about 2 minutes.
2. Then, maintaining engine at 2,500 rpm, count how
may times needle of voltmeter fluctuates between
0 and 5 V.
Result:
Warm up engine at normal operating temperature.
Measure voltage between terminals OX1, OX2 and E1
of data link connector 1 when engine is suddenly raced
to full throttle.
The voltage should be 0.5 V or higher at least once.
Perform inspection within 1 second.
EG–379