Variable Resistor - Toyota COMPUTER-CONTROLLED SYSTEM Training Manual

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 RESISTOR
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 .
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