P0510

COMPONENT DESCRIPTION
The throttle position switch, built into the throttle position sensor unit, consists of a closed throttle position switch and wide open throttle position switch. The closed throttle position switch detects the throttle valve position, i.e. whether it is in the idle position or not. The detected position will then be sent to the ECM as a voltage signal. The ECM 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 (25) (ECM ground).




ON BOARD DIAGNOSIS LOGIC




CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

With Consult
1. Start engine and warm it up to normal operating temperature.
2. Select "DATA MONITOR" mode with CONSULT.
3. Check "CLSD THL/P SW" under the following conditions.
At idle: ON
At 2,000 rpm: OFF
If the check result is NG, go to "DIAGNOSTIC PROCEDURE".
If OK, go to following step.
4. Drive the vehicle for at least 5 consecutive seconds under the following condition.
THRTL POS SEN: More than 2.5 V
VHCL SPEED SE: More than 4 KPH (2 MPH)
Selector lever: Suitable position
Driving location: Driving vehicle uphill (Increased engine load) will help maintain the driving conditions required for this test.
5. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE".

OR




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 (31) and ground under the following conditions
At idle: Battery voltage
At 2,000 rpm: Approximately 0 V
3. If NG, go to "DIAGNOSTIC PROCEDURE".







WIRING DIAGRAM




DIAGNOSTIC PROCEDURE




COMPONENT INSPECTION
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 (5) and (6).




NOTE: Resistance measurement must be made with closed throttle position switch installed in vehicle.
If NG, replace throttle position switch.




Throttle position sensor
1. start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF".
3. Disconnect throttle position sensor harness connector.
4. Make sure that resistance between terminals (2) and (3) changes when opening throttle valve manually.




NOTE: Resistance measurement must be made with throttle position sensor installed in vehicle.
If NG, replace throttle position sensor.
To adjust throttle position sensor, perform "Basic Inspection".