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dh11: Service Code 63: Check Voltage VREF to Signal Return
Steps _ Refer to schematic in Pinpoint Test DH
_ Key Off, wait 10 seconds
_ Disconnect Throttle Position sensor vehicle harness connector at throttle body. Inspect for damaged pins, corrosion, loose wires, etc. Service as necessary
_ DVOM on 20 volt scale
_ Key On engine Off
_ Measure voltage between VREF and SIGNAL RETURN at the Throttle Position Sensor vehicle harness connector
Result Is voltage between 4.0 and 6.0 volts?
Direction YES

GO to Continue

NO

GO to Pinpoint Test Step Continue


TPS Information:
ComponentThrottle Position Sensor
DescriptionThe TPS provides the EEC with a signal proportional to opening angle of the throttle body throttle plates, which informs the EEC the movement and position of the throttle plate.
LocationMounted on the throttle body
Wire ColorsDark Green with Light Green stripe
Orange with White stripe
Black with White stripe
Image