Operation CHARM: Car repair manuals for everyone.

TA17 - Check PNP Circuit Continuity



- Key "OFF".

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Disconnect Park Neutral Position (PNP) switch (3 pin at transmission).

Testing Schematic:






- Measure resistance between test pin 30 at the breakout box and PNP/IGN Start circuit at PNP switch vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service open between PCM and PNP circuit connection to Start circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)