Error Code E CO

Communication error between main MICOM and display MICOM

Also displayed as: E CO

How to Fix

1. 1

   Check hinge wiring harness connection between main body and door; reconnect if loose.

2. 2

   Measure voltage at CON101 1st Pin to 2nd Pin; expected 12V. If not 12V, check hinge connection; if hinge is good, replace Main PCB.

3. 3

   Measure voltage at CON101 5th Pin to 2nd Pin; expected 12V. If not 12V, check hinge connection; if hinge is good, replace Main PCB.

4. 4

   Measure voltage at CON101 3rd Pin to 2nd Pin; expected active signal (not fixed 0 or 5V). If fixed, replace Display PCB.

5. 5

   Measure voltage at CON101 4th Pin to 2nd Pin; expected active signal (not fixed 0 or 5V). If fixed, replace Main PCB.

6. 6

   Measure voltage at CON5 4th Pin to 3rd Pin; expected active signal (not fixed 0 or 5V). If fixed at 0 or 5V, replace Display PCB.

7. 7

   Measure voltage at CON5 5th Pin to 3rd Pin; expected active signal (not fixed 0 or 5V). If fixed, replace Main PCB.

8. 8

   If all voltages check out, explain normal operation to customer.