INSPECTION AND ADJUSTMENT
- Variable Resisto
r
VARIABLE RESISTO
R
OBJECTIVE
:
To learn the procedure for inspecting the variable resistor
.
PREPARATION
:
Volt- and ohmmeter (also called "circuit tester" or "multi-tester")
APPLICABLE
ENGINE
: 4A-FE (
Sep
., 1989
)
INSPECTION OF VARIABLE RESISTO
R
1
. INSPECT
VOLTAGE OF
VARIABLE RESISTO
R
(a) Using a voltmeter, measure the voltage between
ECU terminals VC and E2
.
Voltage
: 4 - 6
V
(b) Measure the voltage between ECU terminals VAF
and E2 while slowly turning the idle mixture
adjusting screw, first fully counterclockwise, then
fully clockwise
.
184
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