DTC 0203

COMPONENT DESCRIPTION
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 control valve when the throttle position sensor is malfunctioning.




CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (43)(ECCS ground).




ON BOARD DIAGNOSIS LOGIC

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the closed throttle position switch circuit. During this check, a 1st trip DTC might not be confirmed.
(1) Start engine and warm it up sufficiently.




(2) Check the voltage between ECM terminal (27) and ground under the following conditions.

At idle: Battery voltage At 2,000 rpm: Approximately 0V

EC-TP/SW-01 Closed Throttle Position Switch (DTC P0510):

WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
1. Start engine and warm it up sufficiently.
2. Turn ignition switch "OFF".
3. Disconnect throttle position switch harness connector.




4. Check continuity between terminals (5) and (6) while opening throttle valve manually.

THROTTLE VALVE CONDITIONS / CONTINUITY
Completely closed / Yes
Partially open or completely open / No

If NG, replace throttle position switch.