Circuit diagram ATX 250-12z

What year is it ?
DTC P1682: Ignition 1 Switch Circuit 2

Circuit/System Description
There are 2 ignition 1 voltage circuits supplied to the engine control module (ECM). The first ignition 1 voltage circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The run/crank relay provides the second ignition 1 voltage circuit to the ECM, through a fuse. This ignition 1 voltage provides power to other internal ECM circuits, except those associated with TAC operation. The ECM continuously monitors the voltage level difference between the two circuits.


do you know how to test electrical circuits with a DVOM - digital volt ohmmeter ? Do you know what a wiring diagram is ?

Learn how to test fuel pump electrical circuit !
Fuel Pump Electrical Circuits Description and Operation

Looking at a wiring diagram so you know what all is involved in the electrical circuit . http://www.bbbind.com/free-tsb Enter vehicle info. Year , make , model an engine . Under system click on engine , then under subsystem click on fuel controls . Click the search button then the blue link .Scroll down to the # 7 diagram . Looking at the diagram i see fuel pump module . Fuel pump is controlled by a electronic control module (computer) . This fuel pump module talks with the PCM - engine computer . The fuel system on your vehicle is called electronic returnless fuel system .

Ford Electronic Returnless Fuel System Diagnosis Part 1 Ford

Doesn't have one . Looking at a wiring diagram to view fuel pump electrical circuit would show that . Do you know what automotive electrical wiring diagrams are ? Do you know how to use one along with a DMM - digital multi-meter to test electrical circuit's ? The fuel pump is controlled by the PCM - engine computer by energizing the fuel pump relay .
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model ! Under system click on engine ,then under subsystem click on fuel controls . Click the search button then the blue link. Scroll down to the fifth diagram .Fuel pump electrical circuit .
Fuel Pump Electrical Circuits Description and Operation

Fuel pump relay maybe . or the PCM - engine computer isn't turning it on . Anti-theft system problem maybe . Looking at a wiring diagram an testing the electrical circuit is the way to diagnose .
Fuel Pump Electrical Circuits Description and Operation

Free wiring diagram here http://bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine . Under system click on engine then under subsystem click on fuel controls . Click the search button then the blue link . Scroll down to the fifth diagram . Fuel pump electrical circuit . Watch the video , test the electrical circuit with a DMM - digital multi- meter .

Do you know what a relay is ? Fuel Pump Electrical Circuits Description and Operation Do you know how to do automotive electrical circuit testing ? How to use a DVOM - digital volt ohm meter ? How to read a wiring diagram ? http://www.bbbind.com/free_tsb.html

Got here and use this datasheetarchive.com/ATX+power+supply+450+watt+circuit+diagram-datasheet.html

It will be best to replace the power unit. If you still wish to get the schematic diagram to ATX power supply, try this link.
http://electronicshelponline.blogspot.com/ Pull up older posts.

CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock–up relay valve, which then controls the operation of the lock–up clutch.
DTC No. DTC Detection Condition Trouble Area
P0743

ECM detects open in solenoid SL circuit 4 times when solenoid
SL is not operated (2–trip detection logic)

ECM detects short in solenoid SL circuit 4 times when solenoid
SL is operated (2–trip detection logic)

Open or short in shift solenoid valve SL circuit

Shift solenoid valve SL

ECM
Fail safe function
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF

HI...
The common cause of the problem that you related.
Is the FUEL PUMP RELAY " Called MAIN RELAY.
Is located : left side under the dash.
Is a BIG relay gray colour. with a connector of 7 or 8 wires.
I recomend replace the relay.

And letme know if you solve your problem.

I hope this information work on your problem.
Thank you for use fixya.

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