Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Ad-Ftv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
READ VALUE OF ACCELERATOR PEDAL POSITION SENSOR
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)
DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance |
DESCRIPTION
- УКАЗАНИЕ:
- This is the repair procedure for the accelerator pedal position sensor.
- This electrical throttle system does not use a throttle cable.
- This accelerator pedal position sensor is a non-contact type.
In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA and VPA2 of the ECM changes between 0 V and 5 V in proportion to the opening angle of the accelerator pedal. The VPA is a signal to indicate the actual accelerator pedal opening angle which is used for the engine control, and the VPA2 is a signal to indicate the information about the opening angle which is used for detecting malfunctions. The ECM determines the current opening angle of the accelerator pedal using signals from terminals VPA and VPA2, and the ECM controls the throttle motor based on these signals.
| DTC No. | DTC Detection Condition | Trouble Area |
| P2121 | Condition (a) continues for 2 seconds: (a) Difference between VPA1 and VPA2 exceeds the threshold (1-trip detection logic) |
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WIRING DIAGRAM
Refer to DTC P2120 (See page Нажмите здесь).INSPECTION PROCEDURE
- ПРИМЕЧАНИЕ:
- After replacing the ECM, the new ECM needs registration (See page Нажмите здесь) and initialization (See page Нажмите здесь).
- УКАЗАНИЕ:
- Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
| 1.READ VALUE OF ACCELERATOR PEDAL POSITION SENSOR |
Connect the intelligent tester to the DLC3.
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Turn the ignition switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Position 1 and Accel Position 2.
Read the values.
- Standard voltage:
Accelerator Pedal Accel Position 1 Accel Position 2 Released 0.5 to 1.1 V 0.9 to 2.3 V Depressed 3.0 to 4.6 V 3.4 to 5.0 V
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| OK | ||
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| 2.CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) |
Disconnect the accelerator pedal position sensor connector.
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Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance (Check for open):
Tester Connection Condition Specified Condition A3-1 (VCP2) - A50-56 (VCP2) Always Below 1 Ω A3-2 (EPA2) - A50-58 (EPA2) Always Below 1 Ω A3-3 (VPA2) - A50-54 (VPA2) Always Below 1 Ω A3-4 (VCPA) - A50-55 (VCPA) Always Below 1 Ω A3-5 (EPA) - A50-57 (EPA) Always Below 1 Ω A3-6 (VPA) - A50-53 (VPA) Always Below 1 Ω
- Standard resistance (Check for short):
Tester Connection Condition Specified Condition A3-1 (VCP2) or A50-56 (VCP2) - Body ground Always 10 kΩ or higher A3-2 (EPA2) or A50-58 (EPA2) - Body ground Always 10 kΩ or higher A3-3 (VPA2) or A50-54 (VPA2) - Body ground Always 10 kΩ or higher A3-4 (VCPA) or A50-55 (VCPA) - Body ground Always 10 kΩ or higher A3-5 (EPA) or A50-57 (EPA) - Body ground Always 10 kΩ or higher A3-6 (VPA) or A50-53 (VPA) - Body ground Always 10 kΩ or higher
Reconnect the accelerator pedal position sensor connector.
Reconnect the ECM connector.
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| OK | ||
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