Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Toyota >> 2006 >> Camry Solara SLE, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (3MZ-FE) >> SFI System >> DTC P2121 Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance >> Inspection Procedure

Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester or the OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

When using intelligent tester: 

  1. READ VALUE USING INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch ON.
    3. On the intelligent tester, enter the following menus:

      DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/ACCEL POS #1 and ACCEL POS #2. Read the values.

      Voltage 

      ACCEL POS #1 AND ACCEL POS #2

      Accelerator Pedal ACCEL POS #1 ACCEL POS #2
      Released 0.5 to 1.1 V 1.2 to 2.0 V
      Depressed 2.6 to 4.5 V 3.4 to 5.3 V
      Fig 1: Reading Value Using Intelligent Tester (Accel Pos #1 And Accel Pos #2)
      G04382525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

    NG: GO TO NEXT STEP 

  2. INSPECT ACCELERATOR PEDAL ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR) 
    1. Disconnect the A17 sensor connector.
    2. Measure the resistance of the sensor terminals.

      Resistance 

      ACCELERATOR PEDAL ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR)

      Tester connection Specified Condition
      3 of EP1 - 6 of VCP1
      1 of EP2 - 4 of VCP2      		 2.25 to 4.75 k at 20°C (68°F)
      Fig 2: Inspecting Accelerator Pedal Assembly (Accelerator Pedal Position Sensor)
      G04382526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ACCELERATOR PEDAL ASSEMBLY 

    OK: GO TO NEXT STEP 

  3. CHECK ECM (VPA, VPA2 VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connector.

      Voltage 

      ECM (VPA, VPA2 VOLTAGE

      Tester Condition Accelerator Pedal Condition Specified Condition
      E4-22 (VPA) - E4-28 (EPA) Released 0.5 to 1.1 V
      E4-22 (VPA) - E4-28 (EPA) Depressed 2.6 to 4.5 V
      E4-23 (VPA2) - E4-29 (EPA2) Released 1.2 to 2.9 V
      E4-23 (VPA2) - E4-29 (EPA2) Depressed 3.4 to 5.5 V
      Fig 3: Checking ECM (VPA, VPA2 Voltage)
      G04382527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

    NG: GO TO NEXT STEP 

  4. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
    1. Disconnect the A17 accelerator pedal position sensor connector.
    2. Disconnect the E4 ECM connector.
    3. Measure the resistance of the wire harness side connectors.

      Resistance 

      ACCELERATOR PEDAL POSITION SENSOR - ECM

      Tester connection Specified Condition
      A17-6 (VCP1) - E4-26 (VCPA)
      A17-5 (VPA1) - E4-22 (VPA)
      A17-4 (VCP2) - E4-27 (VCP2)
      A17-3 (EP1) - E4-28 (EPA)
      A17-2 (VPA2) - E4-23 (VPA2)
      A17-1 (EP2) - E4-29 (EPA2)      		 Below 1 ohms
      A17-6 (VCP1) or E4-26 (VCPA) - Body ground
      A17-5 (VPA1) or E4-22 (VPA) - Body ground
      A17-4 (VCP2) or E4-27 (VCP2) - Body ground
      A17-3 (EP1) or E4-28 (EPA) - Body ground
      A17-2 (VPA2) or E4-23 (VPA2) - Body ground
      A17-1 (EP2) or E4-29 (EPA2) - Body ground      		 10 k ohms or higher
      Fig 4: Checking Wire Harness (Accelerator Pedal Position Sensor - ECM)
      G04382528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE ACCELERATOR PEDAL ASSEMBLY 

When using OBD II Scan Tool: 

  1. CHECK ECM (VPA, VPA2 VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connector.

      Voltage 

      ECM (VPA, VPA2 VOLTAGE)

      Tester Condition Accelerator Pedal Condition Specified Condition
      E4-22 (VPA) - E4-28 (EPA) Released 0.5 to 1.1 V
      E4-22 (VPA) - E4-28 (EPA) Depressed 2.6 to 4.5 V
      E4-23 (VPA2) - E4-29 (EPA2) Released 1.2 to 2.9 V
      E4-23 (VPA2) - E4-29 (EPA2) Depressed 3.4 to 5.5 V
      Fig 5: Checking ECM (VPA, VPA2 Voltage)
      G04382529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

    NG: GO TO NEXT STEP 

  2. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
    1. Disconnect the A17 accelerator pedal position sensor connector.
    2. Disconnect the E4 ECM connector.
    3. Measure the resistance of the wire harness side connectors.

      Resistance 

      ACCELERATOR PEDAL POSITION SENSOR - ECM

      A17-6 (VCP1) - E4-26 (VCPA)
      A17-5 (VPA1) - E4-22 (VPA)
      A17-4 (VCP2) - E4-27 (VCP2)
      A17-3 (EP1) - E4-28 (EPA)
      A17-2 (VPA2) - E4-23 (VPA2)
      A17-1 (EP2) - E4-29 (EPA2)      		 Below 1 ohms
      A17-6 (VCP1) or E4-26 (VCPA) - Body ground
      A17-5 (VPA1) or E4-22 (VPA) - Body ground
      A17-4 (VCP2) or E4-27 (VCP2) - Body ground
      A17-3 (EP1) or E4-28 (EPA) - Body ground
      A17-2 (VPA2) or E4-23 (VPA2) - Body ground
      A17-1 (EP2) or E4-29 (EPA2) - Body ground      		 10 k ohms or higher
      Fig 6: Checking Wire Harness (Accelerator Pedal Position Sensor - ECM)
      G04382530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE ACCELERATOR PEDAL ASSEMBLY 

scientia non olet · About Mike's Workshop Manuals