DH90 - Monitor TP Circuit Under Simulated Road Shock

Sensor Wiring Schematic:

- Enter Key On Engine Off Continuous Monitor Diagnostic Test Mode (DTM).

- Connect Analog Volt/Ohm Meter (VOM) or STAR LED to Self Test Output (STO).

- Observe VOM or STAR LED for indication of a fault while performing the following:

- Move throttle slowly to Wide Open Throttle (WOT) position.

- Release throttle slowly to closed position and lightly tap on Throttle Position (TP) sensor (simulate road shock).

- Wiggle TP harness connector.

- Is a fault indicated?

Yes -- Go to DH91. DH91 - Measure TPS Voltage While Exercising Sensor

No -- Go to DH92. DH92 - Check EEC Vehicle Harness