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 (See FREEZE FRAME DATA ).
• This DTC relates to the Accelerator Pedal Position (APP) sensor.

1. READ VALUE OF INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) arid turn the tester on.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ACCEL POS #1 and ACCEL POS #2.
   4. Read the values displayed on the tester.
      Fig 1: Identifying Accelerator Pedal Depressed And Released Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION
      
      

      Accelerator Pedal Operations	ACCEL POS #1 (AP#1)	ACCEL POS #2 (AP#2)
      Released	0.5 to 1.1V	1.2 to 2.0 V
      Depressed	2.6 to 4.5 V	3.4 to 5.0 V

   OK: Go to step  3

   NG: Go to next step 

2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR ECM) 
   1. Disconnect the A26 Accelerator Pedal Position (APP) sensor connector.
   2. Disconnect the A6 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      VPA (A26-6) - VPA (A6-33)	Below 1 Ω
      EPA (A26-5) - EPA (A6-34)	Below 1 Ω
      VCPA (A26-4) - VCPA (A6-35)	Below 1 Ω
      VPA2 (A26-3) - VPA2 (A6-32)	Below 1 Ω
      EPA2 (A26-2) - EPA2 (A6-26)	Below 1 Ω
      VCP2 (A26-1) - VCP2 (A6-27)	Below 1 Ω

      Fig 2: Identifying Harness And Connector (Accelerator Pedal Position Sensor ECM)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      VPA (A26-6) or VPA (A6-33) - body ground	10 kΩ or higher
      EPA (A26-5) or EPA (A6-34) - body ground	10 kΩ or higher
      VCPA (A26-4) or VCPA (A6-35) - body ground	10 kΩ or higher
      VPA2 (A26-3) or VPA2 (A6-32) - body ground	10 kΩ or higher
      EPA2 (A26-2) or EPA2 (A6-26) - body ground	10 kΩ or higher
      VCP2 (A26-1) or VCP2 (A6-27) - body ground	10 kΩ or higher

   4. Reconnect the APP sensor connector.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 
4. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester 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: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   7. Read DTCs.

      Result 

      DTC RESULT REFERENCE
      
      

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

   B: SYSTEM IS OK 

   A: REPLACE ECM