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Have a 97 Villager, and managed to relocate a new knock sensor to the top of the intake manifold. Replacing the factory knock sensor would take 10 hours of shop time. My method took less than an hour. You need to figure out which cable harness and the correct pinout on the harness to run your splice to. The Haynes manual sort of shows where the harness is located at. NOTE: This is for the 97 Villager model. This may work with the 96 - 98 models where the pinouts from the engine control module are supposedly the same. But you may have to confirm this. My knock sensor code P0325 code didn't appear afterwards. The knock sensor, if relocated properly, will pick up an engine knock if mounted properly with 18 - 25 ft-lbs. I did pick up mis-fire codes on an unrelated issue....but fixed that with new wires, distributor, and power transistor.
The Haynes manual has a lousy picture and it's hard to figure out which is the knock sensor sub-harness. On the 97 Villager there are 3 sub-harnesses near the passenger side of the intake manifold. The knock sensor wire is located in one of the smaller sub-harnesses on right side next to manifold. It's usually the WHITE wire that leads to the knock sensor. Trace that wire to the Engine Control Module. Mine traced out to pinout #30 on the ECM. I split open the wire harness and cut the WHITE wire on the side that leads back under the intake manifold. I spliced in the NEW knock sensor with the WHITE wire, and the other wire to GROUND. According to an earlier post.... "B" goes to GROUND...Refer to Autozone diagram or Haynes diagram to figure which of the 2 wires goes to ground. Note: the 95 and 98 models have a different harness that the 96 & 97. But the repair should be the same. After 98, the sub-harness could be somewhere else....and I haven't researched beyond that. I spent about $12 bucks on a knock sensor, and $7 on a new knock sensor harness. Good luck.
Just remember that the van throwing a knock sensor code doesn't necessarily mean the sensor itself is bad.
**It's not the Knock sensors!!! **Hey everyone that's having problems with their knock sensor. I have a 2002 MercuryVillager, and I kept getting readings on the knock sensor. I could not pass emmissions. Replaced o2 sensor etc. and still had problems. The problem is not the knock sensor, I had to replace motor mounts, my mechanic noticed that the motor mounts were hitting on the computer sensor. This is the sensor that connects the computer system to the car. It is with the harness, but instead of replacing the whole harness it was only the one that is close to the mounts that is under the on the right hand side. There is a sensor somehow under neath the mounts. It is hard to see but it is there. I had to go to junk yard to find that small sensor that connects the computer to the car. Once I replaced it with new sensor, the service engine light went off after driving 10-15 miles and never came back on. Passed the emission and never had the problem again. The motor mounts on these vehicles are not that good. They don't last long at all. Instead of pying 700.00 of what the dealer wanted tto charge me i only paid 45.00
Well said, and it sounds like you have a great mechanic - nice detective work.
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