Question about 1994 Jeep Grand Cherokee

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98 wrangler 2.5L was driving heard backfire and engine died. No spark, code tells me open or shorted auto shutdown relay. checked all fuses and switched relays. Replaced the crank and cam sensors still getting same code and no spark. where do I look next?

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Hi, can you tell me which exact trouble code you are getting? The relevant circuits are below.


98 wrangler 2.5L was driving - jturcotte_1297.gifjturcotte_1298.gif

Posted on Mar 23, 2011

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Wont start2004 dodge grand caravan sxt code p0685 show on dash


P0685 DODGE - Auto Shutdown Relay Control Circuit Failure
Possible causes - Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
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Engine Light ON (or Service Engine Soon Warning Light) P0685 Dodge Description: Short or open in Auto Shutdown (ASD) relay circuit, this relay is under the hood in the relay center.

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My 2013 dodge avenger wont start. Im getting a p0688 ECM/PCM code. What should I do


P0688 (generic) = ECM/PCM Power Relay Sense Circuit /Open
P0688 DODGE - Auto Shutdown Relay Control Circuit Low

Check all the ECM fuses, if the fuses are OK try replacing the ASD (Auto Shut Down) relay.

Read more: http://www.autocodes.com/p0688_dodge.html#ixzz405J7vpq8

Possible causes:

- Weak battery - Low voltage while cranking
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Whats the codes p0685 an p0688 on a 2004 chrysler pacifica mean


P0685 CHRYSLER - Auto Shutdown Relay Control Circuit Failure

Short or open in Auto Shutdown (ASD) relay circuit
Symptoms
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- Failed Auto Shutdown relay
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Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

P0688 CHRYSLER - Auto Shutdown Relay Control Circuit Low

The Front Control Module (FCM) has detected the supply voltage below an acceptable value
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted
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Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

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Engine shut off while driving


Have you checked the auto shutdown relay, and are you loosing spark or fuel when it dies ?

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What does the codes 0627-0681-0680-0688 on 2006 chrysler sebring 2.4 16 valve 4 cly


Hi there:

DTC P0627 CHRYSLER - Fuel Pump Relay Control Circuit
ECM (Engine Control Module) detected an open or short in the fuel pump relay circuit
Possible causes
- Fuel pump circuit open or short
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DTC P0680 - Cylinder 10 Glow Plug Circ, and,

DTC P0681 - Cylinder 11 Glow Plug Circ
The Engine Control Module (ECM) has detected a fault in the cylinder #10 or #11 glow plug circuit.


Possible causes
- Cylinder #10, or #11 glow plug circuit is open or shorted
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DTC P0688 CHRYSLER - Auto Shutdown Relay Control Circuit Low

The Front Control Module (FCM) has detected the supply voltage below an acceptable value.

Possible causes
- ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
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Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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12, Direct battery input to PCM was disconnected within the last 50 Key-on cycles 42 .An open or shorted condition detected in the auto shutdown relay circuit.
An open condition detected in the ASD relay output circuit.

An open or shorted condition detected in the fuel pump relay control circuit.

An open circuit between PCM and fuel gauge sending unit.

Circuit shorted to voltage between PCM and fuel gauge sending unit.

No movement of fuel level sender detected.
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I have a 2003 dodge dakota. 4.7l. I get codes p0685 and p0688. No start no spark. Relay is good. But voltage drops when using a voltage meter on one of the grounds in the pdc. Any live wire and that ground...


P0685 DODGE - Auto Shutdown Relay Control Circuit Failure
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)

Possible causes - ASD relay circuit is open or shorted
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P0688 DODGE - Auto Shutdown Relay Control Circuit Low
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)

Possible causes - ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech notes Check all the ECM fuses, if the fuses are OK try replacing the ASD relay. P0688 DODGE Description The Front Control Module (FCM) has detected the supply voltage below an acceptable value

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What does the auto shut off fuse do? 92 Jeep Wrangler is having start up problems.


The auto shutdown relay in your vehicle is controlled by the computer. If the computer does not see a signal from the crank or cam sensor, it will turn off power to the relay which in turn shuts off power to the fuel and ignition system. Unlike those in many passenger vehicles, it's not connected to an impact sensor. (as jeeps are off road vehicles as well as being transportation, if they had an impact sensor, they would be prone to shutdown when traveling over rough off road terrain)
The fuses to the relay are affected by shorting or overload of any components they serve, or by a problem with the relay itself.

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