TA16 - Check PNP/Start Circuit For Short to Power

- Key "OFF".

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

- Install breakout box, leave PCM disconnected.

- Key "ON".

- Measure voltage between test pin 30 and test pin 40 (GND) at the breakout box.

- Is voltage less than 0.5 volt?

Yes -- Key "OFF". Go to TA17. TA17 - Check PNP Circuit Continuity

No -- Service short to power (a direct short to power would always activate starter when Park Neutral Position (PNP) switch was closed. This would prevent Key On Engine Off (KOEO) Self-Test from being entered. Short to power is most likely a high resistance short). Remove breakout box. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)