DTC Code | DTC Name |
---|---|
P2122 | Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input |
P2123 | Throttle / Pedal Position Sensor / Switch "D" Circuit High Input |
P2127 | Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input |
P2128 | Throttle / Pedal Position Sensor / Switch "E" Circuit High Input |
DESCRIPTION
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. The accelerator pedal position sensor has 2 sensors to detect the accelerator position and malfunctions of the accelerator position sensor.
In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA and VPA2 of the ECM changes between 0.5 V and 5.5 V in proportion to the opening angle of the accelerator pedal. The VPA is a signal which indicates the actual accelerator pedal opening angle and is used for engine control, and the VPA2 is a signal which indicates the information about the opening angle and 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 injection volume based on these signals.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P2122 | Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input |
VPA is less than 0.2 V for 0.5 seconds or more when accelerator pedal is depressed. (1 trip detection logic) |
|
Comes on | DTC stored |
P2123 | Throttle / Pedal Position Sensor / Switch "D" Circuit High Input |
VPA is higher than 4.8 V for 0.5 seconds or more. (1 trip detection logic) |
|
Comes on | DTC stored |
P2127 | Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input |
VPA2 is less than 0.5 V for 0.5 seconds or more when accelerator pedal is depressed. (1 trip detection logic) |
|
Comes on | DTC stored |
P2128 | Throttle / Pedal Position Sensor / Switch "E" Circuit High Input |
VPA2 is higher than 4.8 V for 0.5 seconds or more. (1 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | DTC Detection Drive Pattern |
---|---|
P2122 | Ignition switch ON |
P2123 | |
P2127 | |
P2128 |
DTC No. | Data List |
---|---|
P2122 P2123 P2127 P2128 |
|
When DTC P2122, P2123, P2127 and/or P2128 are stored, as a fail-safe operation the ECM limits engine power, such as by estimating the accelerator pedal position as 0 %.
When DTC P2122, P2123, P2127 and/or P2128 are stored, check the accelerator pedal position sensor output by entering the following menus on the GTS: Powertrain / Engine and ECT / Data List / Accel Position.
Accelerator Pedal Position (Fully Closed) |
Accelerator Pedal Position (Fully Open) |
Trouble Area |
---|---|---|
0% | 0% |
|
Approximately 100% | Approximately 100% |
|
WIRING DIAGRAM
*a | Accelerator Pedal Sensor Assembly |
CAUTION / NOTICE / HINT
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. 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 GTS (ACCEL SENSOR OUT NO.1 AND NO.2)
Connect the GTS to the DLC3.
*1 | Accelerator Pedal |
*a | Fully depressed |
*b | Fully released |
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sensor Out No.1 and Accel Sensor Out No.2.
Powertrain > Engine and ECT > Data ListTester Display |
---|
Accel Sensor Out No.1 |
Accel Sensor Out No.2 |
Read the value when fully depressing and fully releasing the accelerator pedal.
Standard Voltage | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON.
Fully close the accelerator pedal for 3 seconds, and then hold it partway open for 3 seconds, then fully open it for 3 seconds.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
Powertrain > Engine and ECT > Trouble CodesResult | ||
---|---|---|
|
NEXT |
END |
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM)
Disconnect the accelerator pedal sensor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CHECK TERMINAL VOLTAGE (VC VOLTAGE)
Disconnect the accelerator pedal sensor assembly connector.
*a |
Front view of wire harness connector (to Accelerator Pedal Sensor Assembly) |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
GO TO STEP 7 |
OK |
REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY
Replace the accelerator pedal sensor assembly.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CHECK WHETHER DTC OUTPUT RECURS
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON.
Fully close the accelerator pedal for 3 seconds, and then hold it partway open for 3 seconds, then fully open it for 3 seconds.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Powertrain > Engine and ECT > Trouble CodesResult | ||||||
---|---|---|---|---|---|---|
|
B |
END |
A |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 2 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 2 |