Code 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.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 43 (ECM ground).




ON BOARD DIAGNOSIS LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.







With CONSULT
1. Start engine and warm it up to normal operating temperature.




2. Check voltage between ECM terminal 27 (Closed throttle position switch signal) and ground under the following condition.
If the result is NG, go to "Diagnostic Procedure".
If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT.




4. Drive the vehicle for at least 5 consecutive seconds under the following condition.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure".

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.







Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminal 27 (Closed throttle position switch signal) and ground under the following conditions.
3. If NG, go to "Diagnostic Procedure".







WIRING DIAGRAM

1 CHECK POWER SUPPLY:

2 DETECT MALFUNCTIONING PART:

3 CHECK INPUT SIGNAL CIRCUIT:

4 DETECT MALFUNCTIONING PART:

5 ADJUST THROTTLE POSITION SWITCH IDLE POSITION:

6 CHECK CLOSED THROTTLE POSITION SWITCH:

7 CHECK THROTTLE POSITION SENSOR:

8 CHECK INTERMITTENT INCIDENT:

DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION




With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and turn ignition switch "ON".
3. Select "DATA MONITOR" mode with CONSULT.




4. Check indication of "CLSD THL/P SW" under the following conditions.

NOTE: Measurement must be made with closed throttle position switch installed in vehicle.

If NG, adjust closed throttle position switch. Refer to "Basic Inspection".
5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.




Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF".
3. Disconnect throttle position switch harness connector.




4. Check continuity between terminals 4 and 5 under the following conditions.

NOTE: Continuity measurement must be made with closed throttle position switch installed in vehicle.

If NG, adjust closed throttle position switch. Refer to "Basic Inspection".
5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.