Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Throttle/pedal position
sensor/switch ”a” circuit / Inspection procedure
Toyota Corolla (E120): Inspection procedure
Hint
:
- if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open.
- Read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. At the time of the malfunction.
Hand–held tester:
1 Read value of hand–held tester(throttle valve opening percentage)

- Connect the hand–held tester to the dlc3.
- turn the ignition switch on.
- select the item ”diagnosis / enhanced obd ii / data list / etcs / throttle pos” and read its value displayed on the hand–held tester.
Result:



2 Inspect throttle position sensor

- Disconnect the t1 throttle position sensor connector.
- measure the resistance between the terminals of the throttle position sensor.
Standard

- Reconnect the throttle position sensor connector.


3 Check harness and connector(ecm – throttle position sensor)

- Disconnect the e3 ecm connector.
- measure the resistance between the terminals of the e3 ecm connector.
Standard:

- Check the resistance between the terminals of the e3 ecm connector.
Standard (check for short):

- Reconnect the ecm connector.


Replace ecm
4 Inspect throttle position sensor

- Disconnect the t1 throttle position sensor connector.
- measure the resistance between the terminals of the throttle position sensor.
Standard:

- Reconnect the throttle position sensor connector.


5 Check harness and connector(ecm – throttle position sensor)

- Disconnect the e3 ecm connector.
- disconnect the t1 throttle position sensor connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):

Standard (check for short):

- Reconnect the throttle position sensor connector.
- reconnect the ecm connector.



Replace ecm
Obd ii scan tool (excluding hand–held tester):
1 Inspect throttle position sensor

- Disconnect the t1 throttle position sensor connector.
- measure the resistance between the terminals of the throttle position sensor.
Standard:

- Reconnect the throttle position sensor connector.


2 Check harness and connector(throttle position sensor – ecm)

- Disconnect the e3 ecm connector.
- measure the resistance between the terminals of the e3 ecm connector.
Standard:

- Check the resistance between the terminals of the e3 ecm connector.
Standard (check for short):

- Reconnect the ecm connector.


Other materials:
Refueling
Opening the fuel tank cap
Perform the following steps to open the fuel tank cap:
Before refueling the vehicle
● Close all the doors and windows, and turn the engine switch off.
● Confirm the type of fuel.
■Fuel types
Unleaded gasoline (Octane rating 87 [Research Octane Number ...
Sound quality is bad only when playing tape
Inspection procedure
1 Replace cassette tape with another and recheck
Replace the cassette tape with another and recheck.
Replace the faulty cassette tape with the normal one to see if the
same trouble occurs again.
Standard: malfunction disappear.
2 Check for any foreig ...
Stopping the engine
1 Stop the vehicle.
2 Continuously variable transmission: Shift the shift lever to P.
Manual transmission: Shift the shift lever to N.
3 Set the parking brake. 4 Press the engine switch.
5 Vehicles without a multi-information display: Release the brake pedal (continuously
variable transmission ...


