Changing Knock Sensor @00 Ls 400?

[Holger]

Hallo together,

first please excuse my bad English.

My Name is Holger I´m from Germany and I did bought (may not a good deal) a 00 LS 400 with low mileage.

but it seems the knock Sensor is not working.

OBD Error: P0325 - Generic

Type Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description
Knock Sensor 1 Circuit
Location Bank 1 or Single Sensor

I did found by searching:

in http://us.lexusownersclub.com/forums/topic/31948-replace-knock-sensors/

You can change the knock sensors and wire harness without removing the intake manifold. Remove the EGR valve, PCV hose and you can get you hand into the V area of the block. A 27mm socket and small rachet with a flex head and the job is done.

and in an other board:

"

IThe good news is that I just finished changing the right-side knock sensor, and the problem is fixed (no more pinging). It was fairly easy to change the sensor. The whole job including test drives took about 1 1/2 hours. I removed a couple of the plastic cover pieces between the manifold and the valve cover, and with a long screwdriver, gently removed the connector on the sensor (accessed on the right side of the engine thru the small openings around the manifold). I removed the knock sensor using a long 3/8 extension with a universal joint and a 1 1/16" sensor socket taped together to hold the tools together. I installed the new sensor using tape on the socket to hold it in place. FYI - The sensors are very tight in the block

Read more: http://www.clublexus.com/forums/ls-1st-and-2nd-gen-1990-2000/183789-gen-1-ls400-knock-sensor-replacement.html#ixzz3sKFHmoMt

"

So my question i did not find an Answer:

does this way to do the work similar with the VVTI Engine in the Late LS400? (Both up are for the older Engines)

and may if any ever did change in the late Engine, did you use an OEM Part without Problems?

Thank You!

[Holger]

Error Douplepost Sorry

[Exhaustgases]

I don't know if it is the same. And I find it hard to believe a 27mm size. I don't remember the size for sure either.

[sha4000]

Those links are to Generation 1 LS 400s (89-94) you have a Gen 2 LS (95-00). You have to remove the intake manifold to get to the knock sensors. It states this in the repair manual and from my own experience changing out the starter which is where both sensors are located I don't see how you would remove them without removing the intake manifold. I don't know how they accomplished it on the Gen 1 but the designs are similar but I guess there are some small differences. I guess you could try to fit something through the 2 side openings on the manifold that yo can see in pic 2. By the way that's a view from underneath the manifold.

[Exhaustgases]

Yeah they could have done something different as far as clearance and that mess behind the manifold on the firewall.

But I guess its way better than a new ford truck or Camaro.

[vissine]

"You can change the knock sensors and wire harness without removing the intake manifold. Remove the EGR valve, PCV hose and you can get you hand into the V area of the block. A 27mm socket and small rachet with a flex head and the job is done. "

I tried this method before, it worked but costed me 2 broken connectors. I then had to remove the manifold to replace the connectors. Unless your hands are very small, there isn't much room to unlock & pull the connectors.

[Mike101]

I need the wiring harness to the knock sensors plus it also has the starter energizing wire in it

[randyrober]

On 2/21/2021 at 3:21 PM, Mike101 said:

I need the wiring harness to the knock sensors plus it also has the starter energizing wire in it

Did you ever find one?? I am now also needing one. Any help will be appreciated!

[randyrober]

Terrible that we can not get this wiring harness. My car only has less than 130,000 miles and is in great shape. Been sitting at mechanics shop for 2 1/2 months looking for this part. Very frustrating.

[paulo57509]

Is the harness missing or just in need of repair?

If repair is an option, what's the extent of repairs that are needed?

[randyrober]

5 hours ago, paulo57509 said:

Is the harness missing or just in need of repair?

If repair is an option, what's the extent of repairs that are needed?

Paul, The mechanic had a code that said replace the sensors. Did that then he saw where a mouse had eaten a wire through on the harness. Tried to splice it but said that did not work and have to replace it 😞

[paulo57509]

21 hours ago, randyrober said:

Paul, The mechanic had a code that said replace the sensors. Did that then he saw where a mouse had eaten a wire through on the harness. Tried to splice it but said that did not work and have to replace it 😞

I believe that the knock sensor wiring is part of the main engine harness.  You're going to have to find the entire harness from a donor car if the splicing didn't "work".

1. You need two of these:  https://www.amazon.com/Connector-knock-Sensor-1-way-Toyota/dp/B01N3N5PHA
2. Cut out the damaged wire(s).
3. Solder and shrink tube new wire sections with the new connectors.  This is not the place for crimp connectors.

[randyrober]

12 minutes ago, paulo57509 said:

I believe that the knock sensor wiring is part of the main engine harness.  You're going to have to find the entire harness from a donor car if the splicing didn't "work".

1. You need two of these:  https://www.amazon.com/Connector-knock-Sensor-1-way-Toyota/dp/B01N3N5PHA
2. Cut out the damaged wire(s).
3. Solder and shrink tube new wire sections with the new connectors.  This is not the place for crimp connectors.

IMG_6844.HEIC This is what it looks like

[paulo57509]

Sorry.  Can't open that image format.

[randyrober]

3 hours ago, paulo57509 said:

Sorry.  Can't open that image format.

Just a pic from my computer. Opens for me but makes me download 1st. Not sure how else I can share it. Sorry