ISC Bad?

[Dream On]

Hey guys. I just got done checking my isc and all the numbers seemed to be around 26.8-28 or 29 ohms. I know that it's supposed to be 28-33 ohms for all of them. I also thought I read somewhere that it should be tested at room temperature. Seeing as how its about 30 degrees outside, I was curious if it is still ok...?

Edit: I would say that about 2 of them were around 26.8 and the other two were around 28 ohms. Just to clarify. Not sure which was which though.

 

[yokotabrat]

You'll be fine. 1.2 ohms won't make that much of a difference. You're okay with testing them at lower than room temp, also. Testing at a lower temp will just mean that your resistance measurements will be slightly lower than what they would be at room temp.

 

[steve]

If you having ISC problems it sounds like the ISC is ok and you'll need to have the drivers on the ECU tested as well. The ISC motor is only 1/3 of the total system.

Steve

 

[Dream On]

Steve, if you remember, I decided to check b/c you recommended it b/c my ecu was a little messed up.

http://dsmtuners.com/forums/showthread.php?t=251393

 

[steve]

And like I said. The ISC doesn't sound like it has shorted or open windings so if you are having ISC problems there are still the other 2/3 of the system left to test.

Steve

 

[merqury]

What else can go wrong that's related to ths ISC (the other 2/3 of the system) ?

 

[Dream On]

What else can go wrong that's related to ths ISC (the other 2/3 of the system) ?

The drivers on the ECU as steve said above I assume.

 

[steve]

What else can go wrong that's related to ths ISC (the other 2/3 of the system) ?

ISC, Wiring, ECU

Steve

 

[96EclipseNA]

i had the same problem u have right now. it was a bad ECU i had in my car. switched the ecu and all went back to normal

 

[Dream On]

I assumed it was the ecu, so I ordered an Eprom and DSMLink. Good enough excuse I suppose. I just wanted to make sure the ISC was ok first so I wouldn't screw up my new ecu.

 

[steve]

I just wanted to make sure the ISC was ok first so I wouldn't screw up my new ecu.

You did the right thing by checking the ISC doe shorted windings before putting a "new" ECU in. I don't remember seeing burned up drivers on your old ECU board but since it did have the caps replaced due to leakage it was very likely that at least one leg of the ISC circuit was bad. One of the circuit traces runs right under the front most filter capacitor.

Steve

 

[Dream On]

Steve, I sent you a pm earlier regarding my ecu. Please check it out.

 

[merqury]

ISC, Wiring, ECU

Would the engine codes tell you specifically if its one of them? I mean will it give you a specific code for each of them or could a ISC code 0505 be any one of these?
Thanks

 

[steve]

Any one of those. The ECU can't tell which failed just that the system did.