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Ford Tector No Start
Topic Started: Jan 11 2018, 07:14 AM (57 Views)
Phikaz
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Hi

I have a Ford Tector 75E17 with the EDC light on. The tech managed to get the Blink code 97, DTC13. He says the EDC needs to be replaced but it is communicating. Something to do with the sensor power supply signal from within the EDC itself. Is is possible that the EDC would fail but still communicate. Has anyone come across this and what was the solution.
Thanks in advance.
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Bazil-S
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Hi,

Yes, there are situations where EDC is defective, but it is able to communicate. Always before you declare a defective ECU, it is necessary to make some checks.
This defect refers to powering of some sensors. Most of the sensors require a stabilized voltage supply and for those on vehicles almost all the sensors are powered by 5V DC.
Inside EDC there is an electronic part that deals with voltage reduction and stabilization, which is self-protected against short circuit, or overload.
If a short circuit occurs, this electronic block will turn off the 5V power supply. In this way all the sensors on the engine will remain without power.
On your vehicle, the fuel pressure sensor, the intake manifold sensor, the oil pressure sensor, are powered by 5V.
Disconnect these sensors, and with a multimeter check the voltage in the connectors. Power pins are usually those at the edge (1 and 3, or 1 and 4 depending on the connector).
With the fuel pressure sensor connector removed, for measuring fitt back the boost sensor, then the oil pressure sensor and check when the 5V power is turned off.
In this way you can identify if a sensor is faulty.
It is also possible for the wires of a sensor to be short-circuited. You must measure their continuity.
Another reason could be the lack of one of the EDC power supplies.
EDC is powered by 4 positive wires and 4 negative wires. If one of these wires breaks, it may create these defects.

N.B.

The 5V electronic block is self-protected, so if the short circuit is removed, it will be able to resume power once the ignition switch is turn Off-On.
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