[V6-12v] Knock Sensor

[Jamescarstuff at aol.com]

Hi Joe --

Haven't checked my e-mail for a few days, so it's possible other people have 
responded to this already. However, for knock sensor 2, here's the deal:

1. It's located at the right-hand, rear of the block, underneath the intake 
manifold as it loops over the V. This is assuming that you're looking at the 
engine bay from the front of the car. You should find that there's a little 
'cutout' down through the outside of the intake manifold and you'll just be able 
to see the hex nut that holds down the sensor.
2. The first thing you should check before doing anything else is that the 
sensor(s) are tightened down to the correct torque, as if they work themselves 
loose, they won't work properly. It's 20Nm, so get a torque wrench with a hex 
head and check that.
3. If that's OK, you have a number of possibilities, mostly to do with faulty 
wiring, before you condemn the actual sensor itself:
- First, unplug the connector from the knock sensor to the ECU - this is on 
the firewall baulkhead between the engine and passenger compartment. You'll see 
a row of five connectors in the middle, and three on the right-hand side 
roughly up behind the coolant expansion tank. It's these that you want for the 
knock sensor and it's the third plug along to the right in this group (green 
coloured, three-way). Pull the plug (engine switched off) and check for a short 
circuit between any of those connector pins (the ones on the sensor side, not 
the ECU side). If there's a connection between any of those sensor pins the 
knock sensor is faulty. Replace it.
- Second, if the knock sensor is not faulty, you'll have to check the next 
bit of wiring (i.e. between the 3-way connector and the ECU. If you get this 
far, e-mail me and I'll send you instructions, as they're a bit more complex and 
I don't want to put them in e-mail unless I absolutely have to!

Good luck
James

In a message dated 20/8/04 4:36:07 pm, jm425 at cornell.edu writes:


> Hello,
> 
> When I get my engine up near 4000 RPM, the engine check light usualy comes 
> on.
> After reading another post on here, I checked to see if it was the intake
> manifold changeover valve, but it was functioning properly.
> I pulled the code, and it was 2144, refrencing to Knock Sensor #2. Anyone 
> seen
> this code before? How should I go about testing the sensor, and where is the
> sensor located?
> 
> Thanks,
> 
> -Joe