Inspection Procedure

HINT:

• This DTC relates to the Accelerator Pedal Position (APP) sensor.
• Read freeze frame data using the Techstream. 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, 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) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG).
   3. Turn the Techstream on.
   4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   5. Read DTCs.

      Result 

   RESULT REFERENCE
   
   

   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.

   B: GO TO DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   A: Go to next step 

2. READ VALUE USING TECHSTREAM (ACCELERATOR POSITION SENSOR) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream on.
   3. Enter the following menus: Powertrain / Engine and ECT / Data List / ETCS / Accelerator Position No. 1 and Accelerator Position No. 2.
   4. Read the values displayed on the Techstream.
   Fig 1: Depressing And Releasing Accelerator Pedal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage 

   ACCELERATOR PEDAL OPERATION CHART
   
   

   Accelerator Pedal Operations	Accelerator Position No. 1	Accelerator Position No. 2
   Released	0.5 to 1.1V	1.2 to 2.0 V
   Depressed	2.6 to 4.5 V	3.4 to 4.7 V

   NG:  Go to step  3

   OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

3. REPLACE ACCELERATOR PEDAL 
   1. Replace the accelerator pedal assembly (See REMOVAL ).
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream on.
   3. Clear DTCs (See DTC CHECK/CLEAR ).
   4. Start the engine.
   5. Allow the engine to idle for 15 seconds.
   6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   7. Read DTCs.

      Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   P2121 is output	A
   No DTC is output	B

   B: SYSTEM OK 

   A: REPLACE ECM  (See ECM )