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SEF505V
Component Description
NHEC0256
A closed throttle position switch and wide open throttle position
switch are built into the throttle position sensor unit. The wide open
throttle position switch is used only for A/T control.
When the throttle valve is in the closed position, the closed throttle
position switch sends a voltage signal to the ECM. The ECM only
uses this signal to open or close the EVAP canister purge volume
control solenoid valve when the throttle position sensor is malfunc-
tioning.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0257
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
CLSD THL/P SW
I Engine: After warming up, idle
the engine
Throttle valve: Idle position ON
Throttle valve: Slightly open OFF
On Board Diagnosis Logic
NHEC0259
Malfunction is detected when battery voltage from the closed
throttle position switch is sent to ECM with the throttle valve
opened.
Possible Cause
NHEC0516
I Harness or connectors
(The closed throttle position switch circuit is shorted.)
I Closed throttle position switch
I Throttle position sensor
DTC P0510 CLOSED THROTTLE POSITION SWITCH
Component Description
EC-438
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