Coolant temperature sensor connector 2000 to 2002

[rennpart]

Just ran across this old thread as it is the only info on the net.

Rebuilding a 2000 Boxster S of mine in my shop that had an engine fire and had the same issue.

If you use the 2 wire sensor on a 4 wire DME you will get a coolant reading via OBD2 but not on the dash.

The fix is as follows:
If your car (read DME) is an original "4 wire" car then you need to use the 4 wire sensor and run them to the trunk area.

If you splice the two wire sensor in your dash will not read correctly as the 4 wire sensor spits out different ohms to the ECU vs the instrument cluster.

Hope this helps someone in another 8 years!

--Aaron

[martsink]

Originally Posted by rennpart

Just ran across this old thread as it is the only info on the net.

Rebuilding a 2000 Boxster S of mine in my shop that had an engine fire and had the same issue.

If you use the 2 wire sensor on a 4 wire DME you will get a coolant reading via OBD2 but not on the dash.

The fix is as follows:
Splice an additional wire off of PIN 22 blue/white wire at the DME and attach the other end of it to pin 29 on the black connector in the trunk (X3/1 connector IIRC it's the black connector in the bundle of 3 connectors on the LH side of the trunk).

Hope this helps someone in another 8 years!

--Aaron

Thanks Aaron, this is great info! I actually never got around to getting mine fixed, since I used a digital display and pull from the GM temp sensor (I have a LS swapped Boxster). Will give this a go!

[rennpart]

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--Aaron

[Uwe]

My temperature gauge stopped working, it simply wouldn't read any longer one morning. The red indicator seems to be working, it comes on with key on, goes out after start. The coolant level sensor system is working also.( slow blink with coolant level low) But the gauge reads nothing. It WAS working fine since the time I bought the car. The chassis is a 2000 Boxster S, the engine was replaced with a low mileage unit from a 2002 Boxster S previous to my ownership. The Coolant sensor inside the coolant jacket driver side engine front is a 4-prong unit, and so is the connector. I bought a coolant sensor specific to this car, but its a 2-prong sensor, so thats no good to me.
Has anyone had tihs experience, and if so, any tips on how to test the gauge itself would be much appreciated.

[Starter986]

Originally Posted by Uwe

My temperature gauge stopped working, it simply wouldn't read any longer one morning. The red indicator seems to be working, it comes on with key on, goes out after start. The coolant level sensor system is working also.( slow blink with coolant level low) But the gauge reads nothing. It WAS working fine since the time I bought the car. The chassis is a 2000 Boxster S, the engine was replaced with a low mileage unit from a 2002 Boxster S previous to my ownership. The Coolant sensor inside the coolant jacket driver side engine front is a 4-prong unit, and so is the connector. I bought a coolant sensor specific to this car, but its a 2-prong sensor, so thats no good to me.
Has anyone had tihs experience, and if so, any tips on how to test the gauge itself would be much appreciated.

Hey Joshua Tree. Yucca Valley here.

Have you checked fuse? Relay? Tried "tapping" on gauge shroud?

[Uwe]

Originally Posted by Starter986

Hey Joshua Tree. Yucca Valley here.

Have you checked fuse? Relay? Tried "tapping" on gauge shroud?

Tapping, yes. Harder tapping, Yes. Connector on temp sensor wiggling, Yes. Fuse, no. I presume that the temp gauge won't have its own fuse, and everything else works fine except the cruise control, and it's fuse is good. What Relay are you referring to?

Yucca Valley here, too. I use JT because most people know where that is, as opposed to YV.

[Starter986]

Originally Posted by Uwe

Tapping, yes. Harder tapping, Yes. Connector on temp sensor wiggling, Yes. Fuse, no. I presume that the temp gauge won't have its own fuse, and everything else works fine except the cruise control, and it's fuse is good. What Relay are you referring to?

Yucca Valley here, too. I use JT because most people know where that is, as opposed to YV.

Relay? Likely no relay. Threw it out there because I didn't check to see if we had one or not. Likely just one fuse for all the gauges.

I use 92262 in my sig because people know where is Palm Springs.

We'll connect sooner or later.