Network communication modules - Network communication Fiesta 2008.75 (06/2008-)


Diagnostic and Testing
Workshop and standard tools
-digital Multimeter
-Ford diagnostic equipment

Monitoring and Verification

-1 -Check the incident reported by the customer.

-2- Perform a visual inspection to detect any electrical damage evident.

visual inspection

electrical check
-Fuse (s).
-Wiring harness.
-Connector.


If the check reveals an obvious problem, fix it (if possible) before proceeding to the next step.

If the cause of the incident is not visually evident, verify the symptom and refer to the tab diagnostic diagnostic equipment Ford.

Control components

Relay engine management (PCM).
 



 



 


Check contact work not connected to the state:

Measure the resistance between PCM relay pin 3 and pin 5, component side.
The measured resistance is it than 10,000 ohms?
If yes, go to 2.
If not, REPLACE PCM relay.




Check contact work in connected state:

By means of a control cable fused (1A), connect pin 1 of the PCM relay, component side, the positive terminal of the battery.
By means of a control cable, connect pin 2 of the PCM component side relay to the negative terminal of the battery.
Measure the resistance between PCM relay pin 3 and pin 5, component side.
The measured resistance is smaller than 2 ohms?
If so, the PCM relay is in good condition.
If not, REPLACE PCM relay.


PCM ------ECU   
 

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