DTC Code | DTC Name |
---|---|
P2120 | Throttle / Pedal Position Sensor / Switch "D" Circuit |
P2122 | Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input |
P2123 | Throttle / Pedal Position Sensor / Switch "D" Circuit High Input |
P2125 | Throttle / Pedal Position Sensor / Switch "E" Circuit |
P2127 | Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input |
P2128 | Throttle / Pedal Position Sensor / Switch "E" Circuit High Input |
P2138 | Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation |
DESCRIPTION
Tech Tips
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.
The accelerator pedal position sensor is mounted on the accelerator pedal and detects the opening angle of the accelerator pedal. Since this sensor is electronically controlled with Hall-effect elements, accurate control and reliability can be obtained. It has 2 sensors to detect the accelerator position and a malfunction of the accelerator pedal position sensor.
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 information about the opening angle which is used for detecting malfunctions. The ECM judges 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 Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Condition (a) continues for 0.5 seconds (1 trip detection logic): (a) VPA is below 0.4 V and VPA2 is more than 0.97 deg, or VPA is higher than 4.8 V. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Conditions (a) and (b) continue for 0.5 seconds (1 trip detection logic): (a) VPA is below 0.4 V. (b) VPA2 is more than 2.7 deg. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Condition (a) continues for 2.0 seconds (1 trip detection logic): (a) VPA is higher than 4.8 V. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Condition (a) continues for 0.5 seconds (1 trip detection logic): (a) VPA2 is below 1.2 V and VPA is more than 2.7 deg, or VPA2 is higher than 4.8 V and VPA is higher than 0.4 V but below 3.45 V. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Conditions (a) and (b) continue for 0.5 seconds (1 trip detection logic): (a) VPA2 is below 1.2 V. (b) VPA1 is more than 2.7 deg. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Conditions (a) and (b) continue for 2.0 seconds (1 trip detection logic): (a) VPA2 is higher than 4.8 V. (b) VPA is higher than 0.4 V but below 3.45 V. |
|
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Ignition switch ON
|
Condition (a) or (b) continues for 2.0 seconds (1 trip detection logic): (a) The difference between VPA and VPA2 is below 0.02 V. (b) VPA is below 0.4 V and VPA2 is below 1.2 V. |
|
DTC No. | Data List |
---|---|
P2120 |
|
P2122 | |
P2123 | |
P2125 | |
P2127 | |
P2128 | |
P2138 |
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
After replacing the ECM, the new ECM needs registration Click here and initialization Click here.
Tech Tips
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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.
PROCEDURE
READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION)
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sens. No.1 Volt % and Accel Sens. No.2 Volt %.
Read the values.
Standard | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
NG | A |
OK | B |
B |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
A |
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)
*1 | Front view of wire harness connector (to Accelerator Pedal Position Sensor) |
*2 | Front view of wire harness connector (to ECM) |
Disconnect the accelerator pedal position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Standard Resistance (Check for Short) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Reconnect the accelerator pedal position sensor connector.
Reconnect the ECM connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR Click here |
OK |
INSPECT ECM TERMINAL VOLTAGE (VCPA AND VCP2 TERMINALS)
*1 | Front view of wire harness connector (to Accelerator Pedal Position Sensor) |
Disconnect the accelerator pedal position sensor connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Reconnect the accelerator pedal position sensor connector.
NG |
REPLACE ECM Click here |
OK |
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY
Replace the accelerator pedal rod assembly Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPLACE ECM
Replace the ECM Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the intelligent tester to the DLC3.
Clear the DTCs Click here.
Turn the ignition switch off and leave the vehicle for 30 seconds.
Turn the ignition switch to ON.
Fully close the accelerator pedal for 3 seconds or more, then hold it partway open for 3 seconds or more, then fully open it for 3 seconds or more.
Confirm that the DTC is not output again.
NEXT |
END