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Automatic shutdown relay - 2000 Dodge Caravan

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  • Dodge Master
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This relay is in the power distribution box. It's purpose is to link the computer with the ignition circuit (the coils) and the fuel pump circuit. When the ASD relay shuts off (by turning the engine off) power is cut to the coils, and in most cases to the fuel pump.

Posted on Jan 02, 2013

  • 5 more comments 
  • Travis Jan 03, 2013

    I believe I may either have a problem with a bad ground (1) I replaced from the back of the motor on top of the air intake . I could not get the bolt loose from the original mount in the back of the motor, So I put it on top of the Alternator mounting bracket to the motor instead. It does connect to the same piece of the air intake just in a different location... (2) I either have a short in the wires between the alternator and the battery... Testing 1 from a cold start it did not charge... 12.0 V I drove around the block test again 13.6 V it is good With lights on and fan on High Heat... ???? so I thought it is the (3) Voltage regulator? or computer I guess .. Not sure? I thought I might try to drive for a while to see if the new ground to the motor just needs to get a good contact... If not I do not know? I have a intermittent problem with the battery recharging.. I also did take the alternator off of the car and tested inside car parts store. they ran test 3 times and it passed all times. I also have a brand new battery... One more potential problem I replaced the serpentine belt because the motor does leak oil from the gasket around the crank shaft pulley (slowly) and gets the belt and pulleys very dirty. (I cleaned it up good, but did not replace the rubber O ring.) 302,000 + miles on vehicle

  • montehammons Jan 03, 2013

    A couple of comments: I would ull off the crank pulley and eplace the front crank seal-pretty easy, and its a seal that fits inside the timing cover, not an o-ring. The belt may be slipping a bit from the oil on it. 13.6 volts sounds great, good miles, too-lol.

  • montehammons Jan 03, 2013

    Oh, yes, the ground: make sure the alternator bracket is metal and not aluminum or alum. alloy. And not sure I understand, do you have a ground strap or wire from engine to frame of car? You definitely need that as the engine sits on rubber mounts and needs a ground from engine to frame. Good luck, t.

  • Travis Jan 04, 2013

    Sorry it is a seal not an O ring. and yes I have a replacement ground strap attached.

  • Travis Jan 04, 2013

    I still have the problem of when it starts It will not charge the battery untill I start driving for a little bit... ?Then it gets to the 13.6 V after it has warmed up or I drive. I can restart it and it will start charging the battery immediately.

  • Travis Jan 04, 2013

    After it sits for a while it will not recharge the battery again until I drive again..

  • montehammons Jan 04, 2013

    Not sure, tmaloney, but check if possible that a bad crank sensor has somewthing to do with it-probably have to check with dealer: If the computer controls alternator output, as if the regulator function is in the computer, then a poor performing crank sensor won't let computer know if alternator should be charging. Just a thought, something to check. See if computer does control alternator-these new systems are wacky to me.

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93 dodge dakota has fire for a second or two when cranked and then nothing. does it have anything to do with the automatic shutdown relay?


I'm not sure on a 1993, but on the generation 2 Dakotas (1997-2004) the automatic shutdown relay will be deactivated (turning off power to coil and injectors) if the PCM does not receive a signal from the crankshaft position sensor.

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1997 dodge stratus wont start has no spark and no trouble codes.


The automatic shutdown (ASD) relay will turn off power to the coil(s) and fuel injectors if the PCM is not receiving a signal from the crankshaft position sensor. You can check the ASD relay, but the problem is almost always a crankshaft position sensor or the wiring/connectors between the PCM and that sensor.

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What is pcm asd circuit


PCM is powertrain control module. ASD is automatic shutdown. The PCM operates the Automatic Shutdown relay and fuel pump relay. The ASD relay supplies power to the fuel injectors and ignition coil. The fuel pump relay connects power to the fuel pump.

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I have a clicking noise on the automatic shutdown relay vehicle wont start unless the clicking goes away


Hi Dave,
The Automatic Shutdown Relay is controlled by the Powertrain Control Module (PCM)
The first thing I would do is to do a THOROUGH check of your charging system. When the battery starts getting sulfated, it can cause the PCM to start acting really erratically. (They tend to get delirious from malnutrition)

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Low voltage from the automatic shutdown relay check engine code 41


Most likely auto shutdown relay is bad. Very common to go bad.

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What is ASD RELAY


The power supplied to the fuel pump, ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.



The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, or if the turbo boost pressure reaches and exceeds the over boost cut-off point, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module. This causes the engine to shut down.


Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start.

Mar 09, 2011 | Dodge Caravan Cars & Trucks

1 Answer

Vehicle will not start and stay running, the automatic shutdown relay fuse blows out right away.


automatic shutdown connection are, pcm C2#21 all fuel injectors, and heated oxygen sensors, check first the Ho2s sensors(4 pcs) located on exhaust pipe, look for burned-out

Jun 19, 2010 | 2000 Dodge Neon

1 Answer

Is the asd relay the same as the eatx relay on a 1995 dodge intrepid


No.
The ASD = Automatic Shutdown Relay
The EATX = Electronic Automatic Transmission Relay.

Jan 20, 2010 | 1995 Dodge Intrepid

1 Answer

My 98 dakota wont fire


Check your Automatic Shutdown Relay in your fuse and relay box under the hood by the battery. The power supplied to the fuel pump, ignition coil, fuel injectors,  and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module.  This causes the engine to shut down.

The logic module monitors the relay driver.  If it senses that the relay driver is not responding correctly it will trigger a code. If the logic module does not sense an absence of current when the circuit is open, or 12 volts DC when the circuit is closed, it knows that the circuit is open or shorted, and triggers code 42. Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. Good luck and hope this helps lead you in the right direction. Hint: The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump. 

Jul 04, 2009 | 1998 Dodge Dakota

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When i drive my 2000 jeep grand cherokee some times it just shuts off and i cant get it started for 10 min at a time or some times after it runs it would only go 50 yards or so and then shuts off. im...


Check the automatic shutdown relay (ASR) in your fuse box under the hood close to the battery. Try switching the relay with an other relay and see if your still have the problem, the other thing that can cause this is a bad sensor like the cam shaft sensor or crank case sensor going bad. Try switching the relay first then if there is no change, try pulling a dtc code from the computer, Here is a link and hope it helps, keep me posted. Be glad to help http://www.allpar.com/fix/codes.html

Jun 19, 2009 | 2000 Jeep Grand Cherokee

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