SPONSORED LINKS

ECM TROUBLESHOOTING

  • Tiny
  • elotak
  • SAAB

I have a 1993 Pontiac grand am with quad 4 and 5 speed manual trans. The problem is engine will not start and run. Problem started like this. While pulling the park brake release handle an electrical arc was heard and the engine died. After trouble shooting I found the ECM/F INJ fuse blown. I replaced the fuse to no avail. I found that there was a wiring harness that runs under the dash that was sitting on top the park brake release cable and was rubbing every time it was pulled. Eventually rubbing through the insulation and arcing to ground. So my question is could this have damaged the ecm? I have no check engine light ever now. Even when I try to jump the DLC to check the codes. I hooked a scanner up to check and it could not establish communications with the ecm. Which pins give signals to power up the ecm? I have checked to see if I have the 5v reference voltage to the TPS, MAP sensor, and there is nothing coming out of the ECM. I'm lost and I don't want to just go out and spend all that money on a new ecm if it is only the ecm isn't receiving it's signal. Thanks Ed

SPONSORED LINKS
Do you
have the same problem?
Yes
No
Saturday, January 27th, 2007 AT 4:18 PM

3 Replies

  • Tiny
  • jeftfields
  • Member

Did the wire git cut all the though, it sonds like maybe a wire got cut on the cable, and is not completing the circuit for the ecm.

Was this
answer
helpful?
Yes
No
Saturday, January 27th, 2007 AT 4:27 PM
  • Tiny
  • elotak
  • Member

Well the wires didn't get burned all the way through but it did melt about half way through so I patched in an equivelent gage of wire and ran a continuity check through them after completion to make sure they were good and they were. So I'm sure that's not it.

SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, January 27th, 2007 AT 9:09 PM
  • Tiny
  • rayrayzbabe
  • Member

I have a 1988 Thunderbird(71,000 miles), 6 cyl, that mt father just purchaced for me and it runs excellent except, that gas gauge doesn't seem to be working. And either do the warning lights in the dash board for anything. The gauge shows that I am in the red zone, almost to be out of gas, and it seems the more gas that I put in there, I still am in the red.I have checked the fuese and they are all goood. What else can I do or check to get them all to work?I do not want to take my car into the shop for repair because they are ALL to EXPENSIVE! I sthere anything that I can do to repair this on my own?

Was this
answer
helpful?
Yes
No
Wednesday, March 7th, 2007 AT 2:22 AM

Please login or register to post a reply.

Similar Questions

2003 Buick Rendezvous Communication Problem Possibly ...

Computer Problem 2003 Buick Rendezvous 6 Cyl Front Wheel Drive Automatic 56000 Miles Bcm Module Seems To Be Loosing Power. Allarms ...
Asked by MZ ·
8 ANSWERS

Pcm Not Communicating With Tcm

I Have Taken The Van To 2 Shops And They Both Tell Me That The Computers Wont Communicate To Give A Fault Code From Trans. I Have Changed ...
Asked by zcrashz ·
13 ANSWERS
3 IMAGES

1994 Bmw 540i Computer Connection

Computer Problem 1994 Bmw 540i V8 Two Wheel Drive Automatic 81,000 Miles I Want To Use My Obd Sensor Tool To Find Out Why The Check ...
Asked by willeo ·
3 ANSWERS

Pcm Won't Communicate To Pass Texas State Inspection

My Check Engine Light Was On Three Weeks Ago. It Was Code Po440. I Replaced The Gas Cap And Air Filter. My Neighbor Replaced The O2 ...
Asked by Hiidyhoney ·
5 ANSWERS