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FUEL SYSTEM AND THROTTLE BODY 5-25
• Calculate the voltage difference between TP sensor output
voltage at idle and TP sensor output voltage with the STV full
opened.
Example: TP sensor output voltage with the STV fully open
Minus TP sensor output voltage at idle is 0.025 V
STV fully open 1.150 V
Idle - 1.125 V
0.025 V
TP sensor output voltage variation: 0.020 – 0.030 V
• If the voltage variation is out of specification, turn in or out the
fast idle adjust screw 3 to adjust the voltage to specification.
• Cool down the engine to ambient air temperature and start the
engine to check the fast idle rpm comes with in the specified
rpm.
Standard
Fast idle rpm: 1 500 – 2 000 r/min (Cold engine)
Idle rpm : 1 300 ± 100 r/min (Warmed engine)
• If it is not at the specified rpm, the cause may possibly be
short-circuit in water temperature sensor or wiring harness or
STVA.
The fast idle screw is factory-adjusted at the time of
delivery and therefore avoid removing or turning it
unless otherwise necessary.