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How do you bypass the auto shut down?

Checked fuel relay. Has no ignition - power to the coil. No injector pulse. off road only. fuel pump will run with direct power. New cam sensor, new crank sensor.

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No power going to coil I have changed the ignition switch crank sensor coil I have switched auto shut down relay


What is your vehicle? Assuming you have a Chrysler, check to see if the fuel pump is coming on when you switch the ignition to the on position. Most of the Chrysler's with the auto-shutdown relay system use the same power to energize the fuel pump, ignition coil and fuel injectors. The hot lead to the coil should be the same color wire as the lead to the injectors and fuel pump. If power is present at the pump and injectors, then you should trace from the coil back to where it joins up to everything else. If nothing is powered up, check for bad fuses or a bad connection in the engine fuse block.

Apr 23, 2014 | Cars & Trucks

1 Answer

How do you tell if the auto shutdown relay is bad


Any relay can be tested to some degree, but to be certain, just buy an inexpensive relay and try it in there,
The Automatic Shut Down relay is just one of many relays on your car. It takes battery power from the battery, and when activated by the computer, will pass that power on to the fuel injectors and to the ignition coil, some applications also it will work on the fuel pump. If the ASD relay is bad, no injector pulse, no power to coil, etc.-car won't start. When key is turned to off, the relay is not active-I think that may be why it's called auto shutdown relay.

Jun 08, 2012 | 2000 Plymouth Voyager

2 Answers

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

91 ford mustang 5.0 fuel pump and relay is working but the pump is not getting power


How do you know the fuel pump is not getting power?.The fuel pump only comes on for a second or two before cutting back off.The ecm only suppys power to the relay for a few short seconds with key in the on position.Only constant 12 volts is supplied when the engine is running.Is the fuel pump new?How do we know it is good?Also is the engine giving a spark when the engine is turning over?If the engine has no spark,then the pick up coil could be bad,otr the ignition module could be bad.Check the fuel at the injsctors or a fuel line to see if the fuel will pump out when the key is turned on,if it does not,then check to see if the ijectors are pulsing.If the injectors are not pulsing ,and you have spark,then remove the distributor and replace the pick up coil,and the ignition module.The pick up coil,along with the igniyion module give the injectors there pulse.One other thing,If the fuel pump is not for sure coming on,check to see if the relay is clicking on,and then off in a couple of seconds.If this is true,then replace the fuel pump.Any other questons,please ask,I will try to help if I can.I hope this was some help,let me know,thanks.

Sep 29, 2009 | 1991 Ford Mustang

4 Answers

No spark and no gas now what


Hi,

If you have no spark and no fuel pump operation,I would strongly suspect the Auto Shut Down relay.
The Auto Shut Down (ASD) Relay supplies power to the ignition coil, fuel injector, electric fuel pump, and the oxygen sensor heater element as long as the key is in the START or RUN position and the Single Module Engine Controller (SMEC) is receiving a reference signal from the distributor.
If the SMEC receives no distributor reference signal for two seconds or more the SMEC interrupts power to the ignition coil, fuel injectors, electric fuel pump, and the oxygen sensor heater element by removing the ASD relay ground.

Thanks for contacting Fixya.

Jul 26, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Where is the emergency fuel cut off switch located?


The neon don't have one, check the fuse and relay's. The fuel pump is also controlled by the Auto Shut down relay (ASD). 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 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. Good luck and hope this helps. 

Jun 29, 2009 | Plymouth Neon Cars & Trucks

1 Answer

I have a 1998 Isuzu Hombre 2.2L two wheel drive pickup (Made by GM is same as Chevy S10). Ok, here is my problem. It just suddenly stopped running with no warning. It will crank but shows no sign of trying...


The oil pressure sender is a good idea.It sounds like you know what your talking about have you tried spraying a little starting fluid in the throttle body to see if it will start?do you have an injection pulse tester you will need one.if you have no injector pulse but of have spark suspect a bad quad driver in the computer.or possible oil sending unit but this usally just shuts down the pump.Good luck let me know.

Jun 25, 2009 | 1998 Chevrolet S-10 Pickup

3 Answers

1998 jeep grand cherokee will not start


Try resetting the asd "auto shut down fuse had a similar problem the jeep would crank but did not get spark or gas also check your fuel pump? and the asd relay may be bad it will prevent the jeep from getting no spark and will not fire some jeeps have security problems

Jun 25, 2009 | 1998 Jeep Grand Cherokee

1 Answer

No power tp the fuel pump, injectors not pulsing, no fuel.


Check out your oil sending unit, fuel pump and relay, check for power (might be a fuse), the ignition control module (which if you remove it, can be tested for free at AUTO-ZONE), any related wiring, pick-up coil (inside the distributor), and possibly the ignition switch. If I can be any more help just as away.

May 28, 2009 | 1994 Chevrolet Caprice Classic

1 Answer

No reverse only drives for 30 seconds limp mode???? please help!


P1388 = Auto Shutdown (ASD) relay control circuit open or shorted.
The ASD relay routes battery power to the ignition coils, and is energized by the PCM as long as it receives signals from both the crankshaft and camshaft position sensors. If the engine stops turning (stalls), the PCM deengerizes the ASD relay and shuts down the ignition system. The ASD relay also supplies battery voltage to the fuel injectors, so when it shuts down it cuts off both ignition and fuel. At the same time, the PCM also deenergizes the fuel pump relay to turn off the fuel pump. For "limp in" capability, the Chrysler system can run with input from the crankshaft position sensor only. The ASD and fuel pump relays are both located in the Power Distribution Center.

May 10, 2009 | Chrysler Voyager Cars & Trucks

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