DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance [08/2015 - 08/2018]: Procedure
WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read DTCs.RESULT
Result Proceed to P2121 is output A P2121 and other DTCs are output B HINT:
If any DTCs other than P2121 are output, troubleshoot those DTCs first.
Result:
B
GO TO DTC CHART
Refer to:
DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 10/2016]
DIAGNOSTIC TROUBLE CODE CHART [10/2016 - 08/2017]
DIAGNOSTIC TROUBLE CODE CHART [08/2017 - 08/2018]
Result:
A
See step 2
- READ VALUE USING TECHSTREAM (ACCELERATOR POSITION SENSOR)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Data List / ETCS / Accel Sensor Out No. 1 and Accel Sensor Out No. 2.
- Read the values displayed on the Techstream.
Standard voltage
Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out 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 4.75 V
Result:
OK
CHECK FOR INTERMITTENT PROBLEMS
(Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2015 - 08/2018] )
Result:
NG
See step 3
- REPLACE ACCELERATOR PEDAL ASSEMBLY
- Replace the accelerator pedal assembly (Refer to REMOVAL [08/2015 - 08/2018] ).
Result:
NEXT
See step 4
- CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2018] ).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the Techstream on.
- Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read DTCs.RESULT
Result Proceed to P2121 is output A No DTC is output B
Result:
A
REPLACE ECM
(Refer to REMOVAL [08/2015 - 08/2018] )
Result:
B
SYSTEM OK