TE21 - Check VREF At the Throttle Position Sensor

- Key "OFF".

- Disconnect Throttle Position (TP) sensor.

- Key "ON", engine "OFF".

- Measure voltage between VREF and SIG RTN circuits at TP sensor vehicle harness connector. Refer to schematic in Pinpoint Test DH or DQ. DH - Throttle Position (TP) Sensor

- Is voltage between 4.0 and 6.0 volts?

Yes -- Reconnect TP sensor. Go to TE22. TE22 - Check TFT Circuit For Short to Ground

No -- Go to pinpoint test step C1. C1 - Check Vehicle Battery Power Circuit