Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121) 
   1. Connect the intelligent tester to the DLC3 with CAN VIM.
   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 the 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 TABLE 

   A: Go to next step 

2. READ VALUE OF INTELLIGENT TESTER (ACCEL POS#1 AND ACCEL POS#2) 
   Fig 1: Checking Pedal Operation

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   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
      
      

      Accelerator pedal operations	ACCEL POS#1	ACCEL POS#2
      Released	0.5 to 1.1V	1.5 to 2.9 V
      Depressed	2.5 to 4.6 V	3.5 to 5.5 V

   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 DLC3 with CAN VIM.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear the 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 the DTCs.

      Result 

      RESULT REFERENCE
      
      

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

   B: CHECK FOR INTERMITTENT PROBLEMS 

   A: REPLACE ECM