Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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 intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   4. Read DTCs.

      Result 

      RESULT CHART
      
      

      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 INTELLIGENT TESTER (ACCEL POS#1 AND ACCEL POS#2) 
   1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS / ACCEL POS#1 and ACCEL POS#2.
   4. Read the voltage for the accelerator pedal position sensor data.

      Standard voltage 

      VOLTAGE SPECIFICATION CHART
      
      

      Accelerator pedal operations	ACCEL POS#1	ACCEL POS#2
      Released	0.5 to 1.1V	1.2 to 20. V
      Depressed	2.6 to 4.5 V	3.4 to 5.0 V

      Fig 1: Identifying Accelerator Pedal Depressed And Released Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: CHECK FOR INTERMITTENT PROBLEMS 

   NG: GO TO next step 

3. REPLACE ACCELERATOR PEDAL ASSEMBLY 
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2121) 
   1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear DTCs (see DTC CHECK / CLEAR  ).
   4. Allow the engine to idle for 15 seconds.
   5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   6. Read DTCs.

      Result 

      RESULT CHART
      
      

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

   B: CHECK FOR INTERMITTENT PROBLEMS 

   A: REPLACE ECM