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.
• This DTC relates to the accelerator pedal position sensor.

1. 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 engine switch on (IG) and 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 value.

   Standard voltage 

   ACCELERATOR PEDAL OPERATIONS CHART
   
   

   Accelerator Pedal Operations	ACCEL POS #1 (AP#1)	ACCEL POS #2 (AP #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

   Fig 1: Identifying Accelerator Pedal Depressed And Released Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK:  Go to step  3

   NG: Go to next step 

2. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
   1. Disconnect the A34 accelerator pedal position sensor connector.
   2. Disconnect the A7 ECM connector.
   3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connections	Specified Conditions
   A34-1 (VCP2) - A7-27 (VCP2)	Below 1 Ω
   A34-2 (EPA2) - A7-26 (EPA2)	Below 1 Ω
   A34-3 (VPA2) - A7-32 (VPA2)	Below 1 Ω
   A34-4 (VCPA) - A7-35 (VCPA)	Below 1 Ω
   A34-5 (EPA) - A7-34 (EPA)	Below 1 Ω
   A34-6 (VPA) - A7-33 (VPA)	Below 1 Ω
   A34-1 (VCP2) or A7-27 (VCP2) - Body ground	10 kΩ or higher
   A34-2 (EPA2) or A7-26 (EPA2) - Body ground	10 kΩ or higher
   A34-3 (VPA2) or A7-32 (VPA2) - Body ground	10 kΩ or higher
   A34-4 (VCPA) or A7-35 (VCPA) - Body ground	10 kΩ or higher
   A34-5 (EPA) or A7-34 (EPA) - Body ground	10 kΩ or higher
   A34-6 (VPA) or A7-33 (VPA) - Body ground	10 kΩ or higher

   Fig 2: Disconnecting A7 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: Go to next step 

3. REPLACE ACCELERATOR PEDAL 
4. CHECK OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE OUTPUT AGAIN) 
   1. Clear the DTCs (see DTC CHECK / CLEAR ).
   2. Start the engine and allow the engine to idle for 15 seconds or more.
   3. Read DTCs.

   Result 

   RESULT CHART
   
   

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

   B: SYSTEM OK 

   A: REPLACE ECM