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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System (SFI) - Diagnostics (2AZ-FE)) >> DTC P2120, P2122, P2123, P2125, P2127, P2128, P2138: Throttle/Pedal Position Sensor/Switch Circuit >> Inspection Procedure >> Hand-held tester

Hand-held tester

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE OF HAND-HELD TESTER (ACCEL POS #1 AND ACCEL POS #2) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. On the hand-held tester, enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ETCS/ACCEL POS #1 and ACCEL POS #2" and read its value displayed on the hand-held tester.
      Fig 1: Identifying Accelerator Pedal Position
      G02907991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      ACCELERATOR PEDAL POSITION AND VOLTAGE SPECIFICATIONS

      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
    1. OK: Go to step   5 . 
    2. NG: GO TO NEXT STEP. 
  2. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
    1. Disconnect the A27 sensor connector.
    2. Disconnect the E5 ECM connector.
    3. Measure the resistance of the wire harness side connectors.
      Fig 2: Identifying Wire Harness Accelerator Pedal Position Sensor & ECM Connector Terminals
      G02907992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 3: Harness Resistance Specifications
      G02907993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  3. INSPECT ECM (VCPA AND VCP2 VOLTAGE) 
    1. Disconnect the A27 sensor connector.
    2. Turn the ignition switch ON.
    3. Measure the voltage of the ECM connector.
      Fig 4: Inspecting ECM (VCPA And VCP2 Voltage)
      G02907994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 5: Tester Connection And Voltage Specifications
      G02907995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE ECM (See  REPLACEMENT  ) 
    2. OK: GO TO NEXT STEP. 
  4. REPLACE ACCELERATOR PEDAL ROD ASSY (See  REPLACEMENT  ) 
    1. GO TO NEXT STEP. 
  5. READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE OUTPUT AGAIN) 
    1. Clear the DTC (see DTC CHECK/CLEAR ).
    2. Start the engine.
    3. Run the engine at idle for 15 seconds or more.
    4. Read the DTC.

      Result: 

      DTC OUTPUT RESULT

      Display (DTC Output) Proceed to
      P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138 are output again A
      No DTC output B
    1. B: SYSTEM OK 
    2. A: REPLACE ECM (See  REPLACEMENT  ) 
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