Inspection Procedure

HINT:

Read freeze frame data using a Techstream. Freeze frame data record 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 a Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   5. Read DTCs.

      Result 

      RESULT REFERENCE
      
      

      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.

      B: GO TO DTC CHART 

      A: Go to next step 

2. READ VALUE USING TECHSTREAM (ACCEL SENSOR OUT NO. 1 AND ACCEL SENSOR OUT NO. 2) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Select the following menu items: Powertrain/Engine and ECT/Data List/ETCS/Accel Sensor Out No. 1 and Accel Sensor Out No. 2.
   5. Read the values displayed on the tester.
      Fig 1: Checking Accelerator Pedal Operation

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Accelerator Pedal Operations	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 5.0 V

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

      NG: Go to next step 

3. REPLACE ACCELERATOR PEDAL 
   1. Replace the accelerator pedal (See REMOVAL  ).
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Clear DTCs (See DTC CHECK/CLEAR  ).
   5. Start the engine.
   6. Allow the engine to idle for 15 seconds or more.
   7. Fully depress and release the accelerator pedal several times quickly.
   8. Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   9. Read DTCs.

      Result 

      RESULT REFERENCE
      
      

      Display (DTC Output)	Proceed To
      P2121	A
      No output	B

      B: END 

      A: REPLACE ECM (See  REMOVAL   )