1992 Jeep Wrangler ecm

1992 JEEP WRANGLER
120,000 MILES • 6 CYL • 4WD • MANUAL
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MISALA
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we send out the ecm to get rebuilt but still don't start is cranks but don't turn over . the ecm is getting power but theres no power coming out of the ecm to the coil we are not getting a spark i just want to know if the ecm controls the power going to the coil . also should diagnostic conector have power cause when we put the scanner on it, it doesn't read or turn on my scanner
Aug 29, 2010 at 10:47 AM
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WRENCHTECH
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The power for the coil and injectors comes from the ASD relay. The ASD relay is triggered by the ECM.

See if your getting 2 second pulse of power to the coil when the key is first turned on.
Aug 29, 2010 at 11:03 AM
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MISALA
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which terminal on the ecm let the ecm know when the ignition switch is on the on position . ok I am getting no pulse from the coil does the ecm controls the power to coil
Aug 29, 2010 at 11:22 AM
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MISALA
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what activates the ecm to come on and activate all the relays . we checked all the relays and they are working, as long as we ground them with test light, theres power going into the ecm put its not sending back to any of the relays that it controls
Aug 29, 2010 at 11:30 AM
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WRENCHTECH
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Your not following me. Go to the power wire on either the coil or the injectors on the Dk green with black wire and see if it powers for 2 seconds when the key is turned on.
Aug 29, 2010 at 11:30 AM
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MISALA
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ok we tseted the wires going to the coil and the injectors there is no power
Aug 29, 2010 at 11:58 AM
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WRENCHTECH
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Go to the ASD relay and remove it. Test to see if you have power at 2 of the terminals with the key on.
Aug 29, 2010 at 12:05 PM
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MISALA
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THERS ONLY BATTERY POWER THE OTHER ENDS ARE DEAD
Aug 29, 2010 at 12:43 PM
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WRENCHTECH
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What i asked is if 2 sockets are powered with the key on.
Aug 29, 2010 at 12:45 PM
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MISALA
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NO, NO POWER AT ALL WITH THE KEY ON OR OFF EXCEPT FOR THE BATTERY POWER
Aug 29, 2010 at 1:00 PM
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WRENCHTECH
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What do you mean by battery power?
Are you testing the relay socket or not?
Aug 29, 2010 at 1:01 PM
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MISALA
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I MEAN I TESTED THE SOCKET WERE THE RELAY GOES AND ONLY ONE SIDE HAS POWER AND ITS COMING FROM THE BATTERY ONLY
Aug 29, 2010 at 1:11 PM
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WRENCHTECH
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Check fuse #8 15amp. That supplies power from the ignition switch to terminal 86 of the relay.
Aug 29, 2010 at 1:17 PM
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MISALA
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WHICH FUSE PANEL INSIDE THE ENGINE OR UNDER THE DASH
Aug 29, 2010 at 1:24 PM
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MISALA
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THE # 8 FUSE IS GOOD BUT THERES NO POWER ON THE TERMINAL 86
Aug 29, 2010 at 1:37 PM
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WRENCHTECH
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That fuse should be powered from the ignition switch on a yellow coming in and a white with yellow coming out of the fuse in "run" position. Track down the problem.
You could try jumping power to that wire to see if the car starts.
Aug 29, 2010 at 1:42 PM
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MISALA
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ok we jumped it we got power going to the ecm but still wont start we are not getting no spark to the coil still. we were able to hook the scanner getting code dtc33 a/c cluth wire is open or shorted
Aug 29, 2010 at 2:43 PM
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WRENCHTECH
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Did the ASD relay power up on it's own when you supplied power to it?

This would have sent power to the coil and injectors. did it?

How long did it stay on?
Aug 29, 2010 at 2:48 PM
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MISALA
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also getting codes 42 and 33
Aug 29, 2010 at 2:50 PM
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WRENCHTECH
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Resolve your power issue to the ASD relay before going any further.
Aug 29, 2010 at 2:53 PM
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MISALA
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how do reactivate the ASD relay , you think that the fuel pump went bad the shut down the whole system because the ASD relay wires up to the fuel pump relay
Aug 29, 2010 at 2:56 PM