Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance. Corolla Auris
Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
DESCRIPTION
FAIL-SAFE
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)
READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION NO. 1 AND ACCELERATOR POSITION NO. 2)
REPLACE ACCELERATOR PEDAL ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR)
CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)
DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance |
DESCRIPTION
- УКАЗАНИЕ:
- Refer to DTC P2120 (See page Нажмите здесь).
DTC No.
| DTC Detection Condition
| Trouble Area
|
P2121
| Difference between VPA and VPA2 is less than 0.4 V, or more than 1.2 V for 0.5 seconds
(1-trip detection logic)
| - Accelerator pedal position sensor
- ECM
|
FAIL-SAFE
The accelerator pedal position sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal opening angle to allow the vehicle to continue driving. If both circuits malfunction, the ECM regards the opening angle of the accelerator pedal as being fully closed. In this case, the throttle valve remains closed as if the engine is idling. If a pass condition is detected and then the ignition switch is turned off, the fail-safe operation stops and the system returns to a normal condition.
WIRING DIAGRAM
Refer to DTC P2120 (See page Нажмите здесь).
INSPECTION PROCEDURE
- 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the tester on.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Result
| Proceed to
|
DTC P2121 is output
| A
|
DTC P2121 and other DTCs are output
| B
|
- УКАЗАНИЕ:
- If any DTCs other than P2121 are output, troubleshoot those DTCs first.
| 2.READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION NO. 1 AND ACCELERATOR POSITION NO. 2) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the tester on.
Select the following menu items: Powertrain / Engine and ECT / Data List / Accelerator Position No. 1 and Accelerator Position No. 2.
Read the values displayed on the tester.
- Standard voltage:
Accelerator Pedal Operation
| Accelerator Position No. 1
| Accelerator Position No. 2
|
Released
| 0.5 to 1.1 V
| 1.2 to 2.0 V
|
Depressed
| 2.6 to 4.5 V
| 3.4 to 5.0 V
|
| 3.REPLACE ACCELERATOR PEDAL ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR) |
Replace accelerator pedal assembly (See page Нажмите здесь).
| 4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the tester on.
Clear the DTCs (See page Нажмите здесь).
Start the engine.
Allow the engine to idle for 15 seconds.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Result
| Proceed to
|
DTC P2121 is output
| A
|
DTC is not output
| B
|
