FI6851
VC
VAF
E2
G--Y
LG--B
1
6
9
E5
E5
E5
VC
VAF
E2
5 V
E1
Variable Resistor
Engine ECU
2
3
1
G--R
--
DIAGNOSTICS
ENGINE (2RZ--FE, 3RZ--FE)
DI--183
Variable Resistor Circuit (3RZ--FE)
CIRCUIT INSPECTION
This resistor is used change the air--fuel ratio of the air--fuel mixture.
The idle mixture is adjusted using this resistor.
Turning the idle mixture adjusting screw clockwise moves the contacts inside the resistor, raising the terminal
VAF voltage. Conversely, turning the screw counterclockwise lowers the terminal VAF voltage.
When the terminal VAF voltage rises, the engine ECU increases the injection volume slightiy, marking the
air--fuel mixture a little richer.
WIRING DIAGRAM
DI1IX--01
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Pages From Supplement
3RZ-F,3RZ-FE