Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING INTELLIGENT TESTER (ACCEL SENS. NO.1 VOLT % AND ACCEL SENS. NO.2 VOLT %)
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)
DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance |
DESCRIPTION
Refer to DTC P2120 (Toyota Fortuner RM0000018WX02ZX_01.html).DTC No.
| DTC Detection Condition
| Trouble Area
|
P2121
| Condition (a) continues for 2 seconds:
(a) Difference between VPA1 and VPA2 exceeds the threshold
(1 trip detection logic)
| - Accelerator pedal position sensor circuit
- Accelerator pedal position sensor
- ECM
|
WIRING DIAGRAM
Refer to DTC P2120 (Toyota Fortuner RM0000018WX02ZX_02.html).
INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK030X.html) and initialization (Toyota Fortuner RM0000012X2005X.html).
- HINT:
- 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.
| 1.READ VALUE USING INTELLIGENT TESTER (ACCEL SENS. NO.1 VOLT % AND ACCEL SENS. NO.2 VOLT %) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Enter the following menus: Powertrain / Engine / Data List / Accel Sens. No.1 Volt % and Accel Sens. No.2 Volt %.
Read the values.
- Standard voltage:
Accelerator Pedal Operation
| Accel Sens. No.1 Volt %
| Accel Sens. No.2 Volt %
|
Released
| 8 to 28%
| 30 to 55%
|
Depressed
| 51 to 86%
| 73 to 98%
|
| 2.CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) |
Disconnect the A22 sensor connector.
Disconnect the E4 ECM connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance (Check for open):
Tester Connection
| Specified Condition
|
VCP2 (A22-1) - VCP2 (E4-27)
| Below 1 Ω
|
EPA2 (A22-2) - EPA2 (E4-29)
| Below 1 Ω
|
VPA2 (A22-3) - VPA2 (E4-23)
| Below 1 Ω
|
VCPA (A22-4) - VCPA (E4-26)
| Below 1 Ω
|
EPA (A22-5) - EPA (E4-28)
| Below 1 Ω
|
VPA (A22-6) - VPA (E4-22)
| Below 1 Ω
|
- Standard resistance (Check for short):
Tester Connection
| Specified Condition
|
VCP2 (A22-1) or VCP2 (E4-27) - Body ground
| 10 kΩ or higher
|
EPA2 (A22-2) or EPA2 (E4-29) - Body ground
| 10 kΩ or higher
|
VPA2 (A22-3) or VPA2 (E4-23) - Body ground
| 10 kΩ or higher
|
VCPA (A22-4) or VCPA (E4-26) - Body ground
| 10 kΩ or higher
|
EPA (A22-5) or EPA (E4-28) - Body ground
| 10 kΩ or higher
|
VPA (A22-6) or VPA (E4-22) - Body ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.REPLACE ACCELERATOR PEDAL ROD ASSEMBLY |
Replace the accelerator pedal rod assembly (Toyota Fortuner RM0000013ZF006X.html).
| 4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Clear DTCs (Toyota Fortuner RM0000012WY00LX.html).
Start the engine.
Allow the engine to idle for 15 seconds.
Enter the following menus: Powertrain / Engine / DTC.
Read the DTCs.
- Result:
Display (DTC Output)
| Proceed to
|
P2121
| A
|
No output
| B
|
