Look at this link
http://www.rason.org/Projects/transwit/transwit.htm
where is the pnp swich on my v70 volvo
Park and Neutral Position Switch
The PNP switch circuit uses a PNP transistor to control the flow of current based on the input signal. When the input signal is high, the transistor allows current to flow from the collector to the emitter, turning the switch "on". When the signal is low, the transistor blocks current flow, turning the switch "off".
PNP is sourcing. NPN is sinking. You generally connect NPN to ground and your PLC(or any load)input. With PNP you connect to V+ and to your PLC. Your PLC (load) should have the same ground or V+. Sourcing (PNP) provides a path to +24DC generally. Sinking (NPN) provides a path to 0V DC.
check PNP switch (neutral safety switch)
npn and pnp transistors have the same operation as one another, they are both switches, pnps may be known as inverted switches because they work on negative voltage supplys and not positive voltage supplies.
The pnp switch is short for Park/Neutral Switch. Its pretty much the middle man between the ignition switch and the starter. It only allows the current from the ignition switch to reach the starter if the vehicle is in park or neutral. Its usually connected to the shifter. Allow me to correct myself on the first answer. If the shifter is on the column it will be located in the column region. If shifters on the floor its under the vehicle and connected to the shifter.
The Add Hardware Wizard
pnp and npn transistor
Check the park/neutral position(pnp) switch may be is losse or need adjusment.an easy way to adjust is whit one 3/32 -inch drill bit in to the adjustment hole of the(pnp) switch, and rotate the switch assembly until the drill drops into the carrier lang hole and tighten tthe switch bolts. Also check the shift cable for smooth run and adjustment (note) the (pnp) switch is locate on top of the transaxle......
pnp answer
Yes, its pnp