Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance
Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
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 ROD ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)
DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance |
DESCRIPTION
- HINT:
- Refer to DTC P2120 (RAV4_ACA30 RM000000PFY0OEX.html).
DTC No.
| DTC Detection Condition
| Trouble Area
|
P2121
| Difference between VPA and VPA2 less than 0.4 V, or more than 1.2 V for 0.5 seconds (1 trip detection logic)
| - Accelerator Pedal Position (APP) sensor
- ECM
|
FAIL-SAFE
The APP sensor has 2 (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 2 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 (RAV4_ACA30 RM000000PFY0OEX_08.html).
INSPECTION PROCEDURE
- HINT:
- 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (RAV4_ACA30 RM000000PDS09FX.html).
| 1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and turn the tester on.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read DTCs.
- Result:
Display (DTC Output)
| Proceed to
|
P2121
| A
|
P2121 and other DTCs
| B
|
- HINT:
- 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 to the ON position 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 ROD ASSEMBLY |
| 4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and turn the tester on.
Clear DTCs (RAV4_ACA30 RM000000PDK0WDX.html).
Start the engine.
Allow the engine to idle for 15 seconds.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read DTCs.
- Result:
Display (DTC Output)
| Proceed to
|
P2121
| A
|
No output
| B
|
