| From | Message |
Richard
Dodge Dakota
JOIN HERE
7/13/2007
18:44:57
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 Subject: '97 Check engine/Limp in mode
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Message:
I have a '97 3.9V6 auto trans with 70K miles. Started it up and the Check Engine Lamp came on. It appeared to be in Limp-in mode as it would not shift out of third into overdrive, would not shift down even at a stop, but could be manually shifted into second, not first. I connected a code reader and came up woth P1389. Can someone explain the Limp-in mode and possibly what P1389 is? I cleared the code and all has been OK for about 100 miles. Haven used the truck since.
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daddio
Dodge Dakota
JOIN HERE
7/13/2007
20:36:15
| RE: '97 Check engine/Limp in mode
IP: Logged
Message:
P1389 No Auto Shutdown (ASD) Relay Output Voltage At PCM
http://www.obd-codes.com/trouble_codes/dodge/
sounds like your ASD realy is on the fritz. try swapping it with the horan or a/c relay and see if that cures the problem. then go buy a new relay.
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Richard
Dodge Dakota
JOIN HERE
7/14/2007
22:50:05
|  RE: '97 Check engine/Limp in mode
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Message:
Thanks. I'll try the ASD. Can you tell me what the function of the ASD relay is? Also, under what conditions will it go into the limp-in mode?
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J and J Auto
GenII
7/15/2007
00:52:18
| RE: '97 Check engine/Limp in mode
IP: Logged
Message:
Limp is when the computer loses a main input
signal at that time it goes into limp what that
means is its running on the base computer tables
ASD powers the
o2 sensor
injectors
try the relay swap from like A/C they are all the
same 30 amp relays in the power dist box under
hood
Auto Shut Down it turns everything off the comp
needs to see the ASD voltage and is turned on by
the comp on the ground side
so posible bad ground or splice in the wire
harnas from relay to comp
Larry
J&J Auto
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Richard
Dodge Dakota
JOIN HERE
7/15/2007
19:24:03
| RE: '97 Check engine/Limp in mode
IP: Logged
Message:
Thanks again for your help.
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