A341e Crown Transmission Speed Senor

[Shuey]

Hey Guys,

Its been a while...
I'm piecing together my old parts engine/trans to go into a 1987 Extra Cab Hilux 2wd.

Have a busted speed sensor on the tail housing of the transmission. Wondering if anyone has a photo of what a complete sensor looks like and where I might find the part number/a source to buy a replacement?

Just double checking also that this sensor is required by the ECT to function correctly ie, it is not just used to pass through the ECT to produce a signal for the dashboard speedometer?

Cheers,

Shuey

 

[Shuey]

The gear drive has 18 teeth btw...

.... if someone knows how many pulses per revolution the sensor emits, that would be handy also.

 

[Shuey]

Just out of interest… for any that are interested… I asked a friend of mine to take a picture of the sensor he has in his Crown transmission that is running the factory separate ecu/ect and this is what he has as a sender:

 

[Shuey]

I found a pic of the factory sender that was in the front cut I had some 15 years ago and it is a different sender:

 

[Shuey]

Now, the sender in his car looks remarkably like a VN Commodore VSS…
And a little research suggested that they put out 10 pulses per revolution.
Does that prompt anyone’s memory on whether the factory sender is a 10 pulse unit?
In the case of a Commodore, it sends the signal to the dashboard speedometer before the signal is divided by 5 to provide the ecu a 2 pulse signal.
Anyone?

 

[gloverman]

I have a video on speed sensors. Im doing a couple again now but I swap to a different ecu so those sensors are removed and replaced with different units.

 

[Shuey]

Thanks Gloverman. That's a great video mate.

Wondering... the very first sensor you test in your cordless drill shows a square wave signal of X pulses per revolution. Do you happen to know how many pulses the ECT sees from that sensor in order to function correctly?

 

[ivan129]

I have a video on speed sensors. Im doing a couple again now but I swap to a different ecu so those sensors are removed and replaced with different units.

Hi Kelvin, You maybe interested in the Max9924 device. link = https://www.farnell.com/datasheets/1915280.pdf its a variable reluctor sensor interface. It will convert the saw tooth signal you see coming from the 2 wire magnetic speed sensors and converts it to a 0 - 5V square wave. I use it to condition speed sensor signal for my transmission controller. Works very well! The PCB uses the components in fig 3 and is about 20 x 20mm. Its a real pain soldering such small SMDs though.