OBD II scan tool (excluding hand-held tester):

WARNING: This page is about a different variant/trim than selected.

INSPECT ECM (VPA AND VPA2 VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between the specified terminals of the E5 ECM connector.
  
  Fig 1: Identifying ECM Connector Test Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Acceleartor Pedal Position Voltage Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: REPLACE ECM (See REPLACEMENT )
2. NG: GO TO NEXT STEP.
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 3: Identifying Wire Harness Accelerator Pedal Position Sensor & ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 4: Harness Resistance Values
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: REPLACE ACCELERATOR PEDAL ROD ASSY (See REPLACEMENT )