OBD II scan tool (excluding hand held tester):
- Check voltage between terminals VPA and EPA, and VPA2 and EPA2 of ECM connector.
PREPARATION:
- Remove the glove compartment (see COMPONENTS ).
- Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals VPA and EPA, and VPA2 and EPA2 of the ECM connector.
OK:
ACCELERATOR PEDAL VOLTAGEAccelerator Pedal Voltage Accelerator Pedal VPA - EPA VPA2 - EPA2 Released 0.5 to 1.1 V 1.5 to 2.9 V Depressed 2.5 to 4.6 V 3.9 to 5.5 V Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- OK : Replace ECM (see COMPONENTS ).
- NG : Go to next step.
- Check for open and short in wire harness in VCPA, VCP2, VPA, VPA2, EPA and EPA2 circuits between ECM and accelerator pedal position sensor (see HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
in INTRODUCTION article).
- OK : Repair or replace.
- NG : Replace accelerator pedal assembly (see SFI article).