A01697
FI01X--01
A01717
Disconnect
E2
Voltmeter
VCC
A01718
SST
VAF (+)
E2(--)
VAF (+)
E2(--)
ON
1RZ--E:
3RZ--FE:
A01719
VCC
E2
Ohmmeter
FI--56
--
ELECTRONIC FUEL INJECTION
VARIABLE RESISTOR
VARIABLE RESISTOR
INSPECTION
1 . RE MO V E VARI ABLE RE S I S TO R
2. INSPECT POWER SOURCE V O LTAG E O F VARI ABLE
RESISTOR
(a)
Disconnect the variable resistor connector.
(b)
Turn the ignition switch ON.
(c)
Using a voltmeter, VCC and E2 of the wiring harness side.
Voltage: 4.5 -- 5.5 V
(d)
Reconnect the variable resistor connector.
3. INSPECT POWER OUTPUT OF VARIABLE RESISTOR
(a)
Turn the ignition switch ON.
(b)
Connect a voltmeter to terminals VAF and E2 of the ECU,
and measure the voltage while slowly turning the idle mix-
ture adjusting screw first fully counter--clockwise, and
then fully clockwise using SST.
(c)
Check that voltage changes smoothly from 0 V to approx.
5 V.
HINT:
These is no sudden jump up to 5 V or down to 0V.
4. INSPECT RESISTANCE O F VARI ABLE RE S I S TO R
(a)
Disconnect the variable resistor connector
(b)
Using an ohmmeter, measure the resistance between ter-
minals VCC and E2 of the variable resistor.
Resistance: 4 -- 6 k
Ω
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3RZ-F,3RZ-FE