Need Guru Help....Engine Temp Sensor

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Still getting code 13. Looiking at page EF & EC 86 (page 208) of the FSM, the "engine temp sensor looks differet than what I was told to get. It does not look like the water temp sensor. Also, I am using my stock HUD and the tach, fuel and water temp all seem to work, and the temp gauge never goes past 1/2 way. Is it working correctly? I think that the engine temp and water temp are 2 different sesnors. Please help!

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Ok, here are a few pics:Sensor:

Location:

In the FSM, it almost looks like sensor in question is the one with the white plug on it. Any comments? What is that? Please help as I need to go get the sensor ASAP!

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

the ECU temp and Gauge temp are two different sensors, but are very close to each other, the gauge temp is the one with a spade connector and the ECU temp sensor is the one with a propler clippy plug like the injectors. It's usually yellow (but not always).

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

that's the gauge temp sensor.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Awesome. Thanks a lot! So when I go to the part stor, what exact part do I need to get? Do I jsut tell them the "ECU temp sesnsor"?

Post by **NeedCAforS13** » Thu Jun 10, 2004 3:37 am

the ECU temp one is here... my CA18DET one was red and my CA18DE one was yellow. I think Jezz is saying you need this one:)

Sean

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

yeah that one.

looks a tad like this...

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Cool. That is what I bought. So why would this go out? I mean, it is brass so it really can't be corroded right? My motor had a bit of rust come out of it right at first. Could that lead to an answer? It is too damn hot here now to pull it, so I will get it around 6-8pm tonite and check back. Thanks guys!

Sean: Just got your email. I will Paypal asap. Sorry bout that man!

Post by **NeedCAforS13** » Thu Jun 10, 2004 3:37 am

rico05 wrote:Sean: Just got your email. I will Paypal asap. Sorry bout that man!

hey no problem =)

Sean

Post by **slw240sx** » Thu Jun 10, 2004 3:37 am

well if you have ever had the great luck of snapping one of those little temp senders open on your head, you would get to see the inner workings and yes they can go bad easily , they are almost like a fiament inside there , it can blow out, especially if when your taking it off or putting it on your socket turns the yellow plugg and not the bolt aprt of it.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Came out no issue. Kinda gunked up bit in good shape. Now I am getting Code 13 and 34 again. I am begenning to think I have a wiring issue. Bought the setup off someone here that said it ran fine on their car. Hmmmm....

Off to go look through the FSM ...yay

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

you can check the temp sensor if you have a multimeter, instructions in here... (oh and the FSM, but this is easier LOL)

http://bagpuss.swan.ac.uk/200s...l.pdf

You did reset the ECU didn't you before retesting?

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Doing it as we speak. After I posted, I remembered to;) If it still comes back, I was looking in the FSM and I see that the det. sensor and the temp. sesnor both cause the ECU to put the ignition in particular in limp mode(page EF&EC 16) So could a bad igniter be the problem? I got it from Kevin, so I dobut that it is messed up.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Ok, let it reset (I let it sit for 30min w/ negative cable off) and no det sensor, but water temp is back! Agrh. COuld it have anything to do with that I am running hose water right now in the cooling system (planned to change once I got it running, as I still need to do a flush)? Mabye not getting the right charge? Argh

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

it's nothing to do with the water, it's just a thermistor, it doesn't care what is making it hot.

have you tested the resistance of the sensor as per manual etc?If that's ok use the multimeter to check the wiring back to the ECU.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

I ran the engine for about 5 minutes to look for a leak in the coolant system. .77 kOhms. FSM says that at 176F, you should see .3 kOhms. I think that the sensor is ok. I am really bad with electrical schematics, so it will take me a while to figure out the ECU side of things. Thanks for the help.

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

I pretty sure that this is the same as the CA ECU Pinout.

http://homepages.ihug.com.au/~robs/ecu.htm

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Thanks, that helped. Is there supposed to be continuity? I would think so, but I am not getting it. Also, what values am I looking for as far as ohms go? I can't find that in the FSM. Also, I ahve a 98 ECU, will that matter?

O, BTW: I am getting ~1.6 kOhms resistance between the two pins.

One more thing: in the FSM it says that I need to connect 28 to "b" and 30 "a". WTF are "b" and "a". Someone flip to pg EF&EC 87 and clue me in! Thanks

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

ECU shouldn't matter I dont think.

YOu should get continuity from the main ECU loom harness (looks like pin 28) to one of the pins in the plug that connects to the sender in the eng bay.

THe other wire in the sender plug is probably to ground.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

SO I check on the harness to the sensor?

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

yeah, to see if there is a break in the wire.

pin 28 of the plug, to the pins in the sensor plug, on of them should show continuity (or very low resistance 1-2Ohms)

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Ok, I am sure I am doing this wrong. Sorry for being a moron, but I just out one of the multimeter prongs in the plug for the sensor and one on the sensor itself (on one of the siganl prongs) with the ECU plugged in. Nothing. No matter which prong I was touching.

Post by **Jezz_s13** » Thu Jun 10, 2004 3:37 am

you want one end of the multimeter in the ECU harness (pin 28) and try the other end on both of the pins on the sensor plug, one of them should give continuity. Ignore the actual sensor for now.

Make sure you are reading the pin out diagram right though, obviously everything is reversed if you are looking from the wrong side.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Trying to rig up my multimeter, the probes on it are too big to fit into the plug to check the wires on the harness;) I am thinking that I need to pull apart my harness, and get to wiring...

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Odd...engine seems fine now. I looked at all my harness real quick, and when I installed it in the dark, I got blue and green mixed up and hooked up #3 and #4 injectors wrong. Ran and revved freely, held better idle. Resetting the ECU to see what we get.

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Still bad:(

Post by **rico05** » Thu Jun 10, 2004 3:37 am

I am kinda at a loss as what I should do now. ANy ideas?

I am begenning to debate about running new wires from the plug to the ECU. ANy comments? I really need this running.

Post by **NeedCAforS13** » Thu Jun 10, 2004 3:37 am

go find Korey... he lives in College Station doesn't he? Borrow his sensor to see if that gets rid of your problem...

Or go to Autozone, as it should be a cheap part (under $20 IIRC)

Sean

Post by **rico05** » Thu Jun 10, 2004 3:37 am

Like I said a little earlier, I already replaced it. DUH Sean;)

I just unplugged my MAF and cranked it for ****s and giggles. Ran smoother than it has yet. I loaned my spare MAF to a friend, now if his lazy *** would jsut bring it to me;)

Post by **GoofyATX240** » Thu Jun 10, 2004 3:37 am

Whos Korey he's in hiding.

Need Guru Help....Engine Temp Sensor

Need Guru Help....Engine Temp Sensor

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