thought I had fixed my problem. Scanmaster was not working. Was installed accordingly to the instructions. I verified power and continuity at the Orange wire from battery to ecm. The the Orange wire from fuse block to ecm. All checked good. So I purchased another ecm. Scanmaster worked like a charm. Then two hours later it stopped working again. Could it be a bad chip(stock) or ecm ( cardoons re manufactured )? I pull like to get this figured out so I can post my readings and get help from there. Thanks in advance guys!!
Scanmaster not working again!
- Thread starter chrisgn6
- Start date
novaderrik
Well-Known Member
- Joined
- May 12, 2004
does it turn on, or does it just not read the ecm?
the first place i'd be looking at would be the data wire from the ecm to see if that's good: what happens if you plug a different scan tool into the ALDL?
the first place i'd be looking at would be the data wire from the ecm to see if that's good: what happens if you plug a different scan tool into the ALDL?
- Joined
- Aug 1, 2003
odds are he has a bad wiring harness connector or relay under the hood that killed the first ecm and without fixing the cause ..there went #2
check the fan relays(replace if in doubt) and check the connector ends for melted terminals
if you have the fan delay relay pull it off its probably full of rust and shorted out intenally
check the fan relays(replace if in doubt) and check the connector ends for melted terminals
if you have the fan delay relay pull it off its probably full of rust and shorted out intenally
I did have another relay for my low fan. Replaced it and that didn't work. Also my tranny was just rebuilt by a professional shop. You think the tcc could still be bad? This problem was also there before the tranny rebuild.
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DeltaBravo
Retired U.S. Army/Navy
- Joined
- Jun 14, 2014
Any luck Chris?
My car just did this today. Scan master was working....three miles later, felt a 'shutter' and SM read blank. When I turn the key on, engine off I will see the 2.1 display and then go blank. Same when I start the car. Car runs good. Checked all three connection and they are good.
I will also check what Bob has recommended and if I find something, i will let ya know.
Damon
My car just did this today. Scan master was working....three miles later, felt a 'shutter' and SM read blank. When I turn the key on, engine off I will see the 2.1 display and then go blank. Same when I start the car. Car runs good. Checked all three connection and they are good.
I will also check what Bob has recommended and if I find something, i will let ya know.
Damon
DeltaBravo
Retired U.S. Army/Navy
- Joined
- Jun 14, 2014
Hi Chris,
Was just wondering if you have found out anything.
I havn't...check wiring connection...Volts....nothing seems wrong.
Curious though, what is the Voltage reading from the diagnostic port (orange wire from the ECM)? Mine reads less than 1 VDC...somewhere around 850 mv.
thanks
Was just wondering if you have found out anything.
I havn't...check wiring connection...Volts....nothing seems wrong.
Curious though, what is the Voltage reading from the diagnostic port (orange wire from the ECM)? Mine reads less than 1 VDC...somewhere around 850 mv.
thanks
Mike Licht
I was here first
- Joined
- May 23, 2001
the shudder makes me think you need to look at the TCC
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