G2 - Throttle Position Sensor Integrity

- Key "OFF".

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box and connect PCM to breakout box.

- Connect Digital Volt/Ohm Meter (DVOM) from test pin 47 to test pin 46 at the breakout box.

- Key "ON", engine "OFF".

- Rotate throttle slowly to Wide Open Throttle (WOT), release throttle slowly to closed position.

- Does the voltage change smoothly between 0.4 and 4.5 volts?

NOTE: Refer to Pinpoint Test DH for schematics and specific engine values. DH - Throttle Position (TP) Sensor

Yes -- For Continuous Memory Diagnostic Trouble Code (DTC) 121: Go to G8. G8 - Check MAF Sensor

For all others: Go to G3. G3 - Check Idle

No -- Verify Throttle Position (TP) sensor is properly installed to the throttle body. If OK, replace TP sensor. Remove breakout box. Reconnect PCM. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)