P0510

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 volume control solenoid 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 32 (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. Turn ignition switch "OFF", wait at least 5 seconds and then start engine.
3. Select "CLSD THL/P SW" in "DATA MONITOR" mode.




4. Check the signal under the following conditions.

Condition Signal indication
Throttle valve: Idle position ON
Throttle valve: Slightly open OFF

If the result is NG, go to "Diagnostic Procedure" below. If OK, go to following step.

5. Select "DATA MONITOR" mode with CONSULT.




6. Drive the vehicle for at least 5 consecutive seconds under the following condition.

THRTL POS SEN More than 2.5V
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.

7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.




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 28 (Closed throttle position switch signal) and ground under the following conditions.
At idle: Battery voltage
At 2,000 rpm: Approximately 0V

3. If NG, go to "Diagnostic Procedure" below.

EC-TP/SW-01:

EC-TP/SW-01 Connectors View:

Wiring Diagram

Diagnostic Procedure

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Component Inspection













With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF".
3. Remove vacuum hose connected to throttle opener.
4. Connect suitable vacuum hose to vacuum pump and the throttle opener.
5. Apply vacuum [more than -40.0 kPa (-300mmHg, 11.81inHg)] until the throttle drum becomes free from the rod of the throttle opener.
6. Turn ignition switch "ON".
7. Select "DATA MONITOR" mode with CONSULT.
8. Check indication of "CLSD THL/P SW".
Measurement must be made with closed throttle position switch installed in vehicle.

Throttle valve conditions Continuity
Completely closed Yes
Partly open or completely open No

If NG, adjust closed throttle position switch. Refer to "Basic Inspection".

9. 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. Remove vacuum hose connected to throttle opener.
4. Connect suitable vacuum hose to vacuum pump and the throttle opener.
5. Apply vacuum [more than -40.0 kPa (-300mmHg, 11.81inHg)] until the throttle drum becomes free from the rod of the throttle opener.
6. Disconnect closed throttle position switch harness connector.

7. Check continuity between closed throttle position switch terminals 4 and 5.
Resistance measurement must be made with closed throttle position switch installed in vehicle.

Throttle valve conditions Continuity
Completely closed Yes
Partly open or completely open No

If NG, adjust closed throttle position switch. Refer to "Basic Inspection".

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