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Nippon Reinz
1993 Lexus SC300 Engine Cylinder Head Gasket Nippon Reinz

P311-2335FC7    W0133-1738786  New

Qty:
$146.62
Nippon Reinz Engine Cylinder Head Gasket
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Nippon Reinz
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
1993 - Lexus SC300
Nippon Reinz
1992 Lexus SC300 Engine Cylinder Head Gasket Nippon Reinz

P311-2335FC7    W0133-1738786  New

Qty:
$146.62
Nippon Reinz Engine Cylinder Head Gasket
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Production: 08/1991-
Brand: Nippon Reinz
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle Prod. Date Range
1992 - Lexus SC300 Fr:08-00-91
MTC
1992 Lexus SC300 Engine Mount MTC

P311-019AC0B    W0133-1740089  New

Qty:
$188.97
MTC Engine Mount
  • Front
Brand: MTC
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Vehicle
1992 - Lexus SC300
Genuine
1993 Lexus SC300 Engine Oil Filter Adapter Seal Genuine

P311-3317EAB    W0133-1982488  New

Qty:
$8.02
Genuine Engine Oil Filter Adapter Seal
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Oil Filter adapter to Engine
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1993 - Lexus SC300
Genuine
1992 Lexus SC300 Engine Oil Filter Adapter Seal Genuine

P311-3317EAB    W0133-1982488  New

Qty:
$8.02
Genuine Engine Oil Filter Adapter Seal
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Production: 04/01/1991-
  • Oil Filter adapter to Engine
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle Prod. Date Range
1992 - Lexus SC300 Fr:04-01-91
Genuine
1993 Lexus SC300 Distributor Cap Genuine

P311-0A74B94    W0133-1629684  New

Qty:
$40.35
Genuine Distributor Cap
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1993 - Lexus SC300
Genuine
1992 Lexus SC300 Distributor Cap Genuine

P311-0A74B94    W0133-1629684  New

Qty:
$40.35
Genuine Distributor Cap
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Production: 08/1991-
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle Prod. Date Range
1992 - Lexus SC300 Fr:08-00-91
Genuine
1997 Lexus SC300 Distributor Cap Genuine

P311-0A74B94    W0133-1629684  New

Qty:
$40.35
Genuine Distributor Cap
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Production: -08/1997
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle Prod. Date Range
1997 - Lexus SC300 To:08-00-97
Genuine
1993 Lexus SC300 Distributor Rotor Genuine

P311-5A37624    W0133-1638676  New

Qty:
$41.01
Genuine Distributor Rotor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1993 - Lexus SC300
Genuine
1992 Lexus SC300 Distributor Rotor Genuine

P311-5A37624    W0133-1638676  New

Qty:
$41.01
Genuine Distributor Rotor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Production: 08/1991-
Brand: Genuine
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle Prod. Date Range
1992 - Lexus SC300 Fr:08-00-91

Showing 1 - 10 of 2,432 Products.


Latest Lexus Sc300 Repair Guides & Installation Advice

CarJunky AutoAdvice

97 lexus sc300, trying to test vss/bypass speedo and wire to ecm

Showing 11 out of 27 Posts | Show 16 Hidden Posts
Question From groundzer0336 on 97 lexus sc300, trying to test vss/bypass speedo and wire to ecm

if you didnt know these cars have tons of issues with the combination meter/ instrument cluster and speedo not working. i first thought the vss was bad since it had a code but then learned about the common issues with the cluster. just tried to test the old vss and a new vss and its just getting a solid voltage and not on/off circuit like testing other hall effect sensors...so thats confusing me. also by looking at several wiring diagrams i see that the signal wire from the vss goes directly to the speedo and comes back out to the ecm. i figured i could splice the signal wire straight to the vss input wire at the ecm but nothing happened. basically i am trying to get enough ready codes to set so i can get this stupid car inspected and will deal with these issues after inspection when i actually have a plate on it and am driving it legally. any help will be greatly appreciated, im ready to roll this thing off a cliff.

Response From nickwarner

If you start splicing ECM reference wires on this car you are going to have a very very expensive issue on your hands, far worse than what you have. If you're using a multimeter to try to read the VSS signal it won't work. The pulses are too fast so the meter will just read an average all the time. You need an oscilloscope to be able to see the signal generated from this sensor and be able to determine if it is glitching.

Response From groundzer0336

i have the sensor out and am turning it really slowly so get the signal. i dont see any issue in splicing the wires since that is where it goes anyway, im just bypassing the speedo where the signal is possibly being lost, somewhere on the circuit board which goes bad on these. the sensor should go between a voltage and an open circuit and very slow revolutions.

Response From nickwarner

i have the sensor out and am turning it really slowly so get the signal.

And hows that working out again?

i dont see any issue in splicing the wires since that is where it goes anyway .

I've heard that from a lot of people that ended up frying very expensive modules, like the kind a luxury brand such as Lexus would use.


Best of luck.

Response From groundzer0336

well im sure there is the possibility. hopefully i wont be one of those cases.

Response From Hammer Time

I don't know where you're getting this nonsense from and your idea is ridiculous.

Response From groundzer0336

What nonsense and why is it rediculous?

Response From Discretesignals

The VSS signal has to go through the combination meter because its signal from the VSS is conditioned inside the combination meter before going off to the ECM. Another words hooking the VSS directly to the ECM isn't going to work because the signal that is coming out of the VSS isn't what the ECM is looking for.

You really need a graphing multimeter or lab scope to see the signal at the combo meter. Don't know what it is supposed to look like but it is supposed have 4 pulse signals for every revolution of the speed sensor shaft. From the combo, the signal is going to change into a square wave.

Response From groundzer0336

No the speedo doesnt work. Lke i said this is a very common prpblem in the sc. Thank you descretesignals i was thinking this but couldnt find any information but is the signal not already a square wave coming from a 3 wire vss? Im just trying to find a way to get my car to set fhe ready codes without replacing the cluster theyre really expensive and dont have that much money right now. Any suggestions?

Response From Discretesignals

I don't know what the signal looks like coming out of that VSS personally. What ever it looks like it isn't what the ECM is looking for, so the combo conditions the signal into some other type of digital signal. There could be differences in voltage amplitudes or maybe the signal format is different?

You could send the cluster out for repair. There are speedo shops that can repair those kind of problems.

Response From groundzer0336

yeah ive seen a few places that will repair it for 2-300. theres one place that repairs 96 and below models for cheap but they dont do 97 and up at the moment but the owner is checking one of the clusters he has to see if he can repair. in theory though, if i had another cluster, not for this specific vehicle but maybe another lexus with the same type of speedo, i could possibly wire the vss through that speedo into the ecm. idk. this car is frustrating.

Response From Discretesignals

It's really not frustrating to fix something like that. Your making it frustrating because your trying to re-engineer it.

Response From groundzer0336

yeah i know, but im pretty broke at the moment and am just trying to make these ready codes complete without having the speedo working.

Response From Discretesignals

Ready codes? Are you wanting it to pass emissions?

Response From groundzer0336

i have to get a failed inspection paper so i can apply for a waiver. i have other issues im dealing with trying to get it to pass, but i can have 2 not ready codes present for the inspection. i got down to 3 before the speedo quit working completely.

Response From Hammer Time Top Rated Answer

If your speedometer isn't working either, there is a good chance that there is no VSS signal even reaching the cluster.

Response From Discretesignals

That is a good possibility. That is why the signal to the combo has to be checked at the back of the combo using something like a lab scope or graphing multimeter.

Response From groundzer0336

it worked intermitantly when i got it and now has completely stopped. the odometer works sometimes now but will go off. apparently some of the parts on the circuit board of the speedo assembly fail and causes the speedo not to work. ill see if one of the guys at my work has a better multimeter i know they dont have a scope.

Response From Discretesignals

You could use a volt meter but you have to back probe it into the VSS output circuit at the cluster.

There are three wires to the VSS.

Yellow should have 12 volts with key on
Red is ground back to the cluster, should be less than .03 volts.

Blue/Red is the signal out. Should be some type of digital signal when the vehicle is moving.


I looked at the diagram and the VSS is sending a voltage signal out to the combo. There is a transistor inside the combo that pulls a voltage low from the ECM. The ECM is watching the signal through a pull down circuit. Another words the ECM is sending some type of voltage to the combo and the combo pulls that voltage to ground to generate the special speed signal for the ECM. That explains why the VSS's signal can't go directly into the ECM.

Response From groundzer0336

ahh i got it now. thanks. im trying to find a good place to get it repaired right now.

Response From groundzer0336

just curious but, and not saying it would work, but for a situation like this where the ecm is seeing the pull of voltage, could a resistor be wired into the circuit and see that voltage drop. im not going to do it ha, seems like it might fry a computer but hypothetically. is that what is basically happening in the speedo itself.

Response From Discretesignals

Actually no. A resistor won't work.


The circuit from the ECM is actually pulled to ground by a transistor. The transistor is turned on and off by detection circuitry in the combo.

The ECM probably sends out some type of voltage such as 5 or 12 volts. The ECM is monitoring the voltage on the circuit. So when the circuit isn't being pulled to ground by the transistor the ECM is going to see high volts. When the transistor pulls the circuit down the ECM is going to see near zero volts.

We'll say for example the ECM is sending out 12 volts, so the ECM is going to see this 0-12-0-12-0-12 (off-on-off-on-off-on) signal being toggled by the transistor as the vehicle is moving. Hence your digital signal via a pull down circuit. The frequency of the on and off signal is how the ECM determines vehicle speed.

Response From Discretesignals

Of course your monitors won't run if the speed signal isn't missing to the ECU. They won't run either if your setting misfire codes.

The EGR monitor is going to run, but soon as the test fails the light is going to come on and the catalyst monitor isn't going to run. It will probably halt the EVAP monitor too.

Your kind of up the creek unless you can get the P0500 to go away. Looks like you may need to save up some money. Swapping in another cluster from a different year and/or model might not work, so you willing to gamble with that?

Response From groundzer0336

gotcha. guess ill start looking for a cluster or get mine repaired.

Response From Hammer Time

What's the code number?

Response From groundzer0336

P0500

Response From Hammer Time

Does the speedo work?