DTC Code | DTC Name |
---|---|
P0122 | Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input |
P0123 | Throttle / Pedal Position Sensor / Switch "A" Circuit High Input |
DESCRIPTION
The throttle position sensor is mounted on the diesel throttle body and detects the opening angle of the throttle valve. This sensor is an electronic sensor and uses Hall-effect elements.
When the throttle valve is fully closed, a voltage of approximately 0.7 V is applied to terminal VLU of the ECM. The voltage applied to terminal VLU of the ECM increases in proportion to the opening angle of the throttle valve and becomes approximately 3.5 to 4.0 V when the throttle valve is fully opened.
This data is used for EGR control, etc.
*1 | Magnet |
*2 | Hall IC |
*3 | Throttle Position Sensor |
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0122 | Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input | Throttle position sensor output (VLU) is less than 0.2 V for 3 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
P0123 | Throttle / Pedal Position Sensor / Switch "A" Circuit High Input | Throttle position sensor output (VLU) is more than 4.8 V for 3 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
DTC No. | Data List |
---|---|
P0122 | Throttle Sensor Volt % |
P0123 |
Throttle Sensor Volt %: Throttle position sensor output voltage is converted using 5 V = 100%.
When fully closed: 14% or less.
When fully open: 70% or higher.
When the ignition switch is turned from off to ON, the throttle valve fully opens once.
When the ignition switch is turned from ON to off, the throttle valve fully closes once.
If DTC P0122 and/or P0123 is stored, the following symptoms may appear:
Intake booming noise
Black smoke
Lack of power
Vibration at engine stop
Turbo overspeed, turbo damage
MONITOR DESCRIPTION
When the output voltage of the throttle position sensor deviates from the normal operating range (between 0.2 V and 4.8 V) for more than 3 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.
CONFIRMATION DRIVING PATTERN
DTC No. | DTC Detection Drive Pattern |
---|---|
P0122 | Ignition switch ON for 3 seconds |
P0123 |
WIRING DIAGRAM
*a | Throttle Position Sensor (Built into Diesel Throttle Body Assembly) |
CAUTION / NOTICE / HINT
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).
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
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
Disconnect the diesel throttle body 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 (POWER SOURCE OF THROTTLE POSITION SENSOR)
Disconnect the diesel throttle body assembly connector.
*a |
Front view of wire harness connector (to Diesel Throttle Body 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 5 |
OK |
REPLACE DIESEL THROTTLE BODY ASSEMBLY
Replace the diesel throttle body assembly.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CHECK WHETHER DTC OUTPUT RECURS
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off for 30 seconds or more.
Turn the ignition switch to ON 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 7 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off for 30 seconds or more.
Turn the ignition switch to ON for 3 seconds.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Confirm that the DTC is not output.
Powertrain > Engine and ECT > Trouble CodesResult | ||
---|---|---|
|
NEXT |
END |