active grille shutter problem

[paulo66]

hi all looking for help with this issue, i have a 60 plate Mondeo TDCI 140 Zetec (facelift) mk4.5
Engine malfunction light came on - diagnosed U0204 "Lost communication with active grille air shutter module a pending DTC"  grille shutters open and intact. checked wiring and no obvious signs of corrosion on plug or motor connection. 
shutters move freely and can be shut then open when ignition is on.

am at a loss as to what to do

[paulo66]

anybody help out there please

[paulo66]

is there anyone who can help at all?

[TomsFocus]

On ‎1‎/‎3‎/‎2019 at 2:20 PM, paulo66 said:

shutters move freely and can be shut then open when ignition is on.

So are the shutters working fine or do they just default to open if you manually close them before switching the ignition on? 

Does the code come back once cleared?

 

[paulo66]

hi yes shutters default to open when closed manually so assumed the motor is working, the code comes back everytime after clearing.

have checked the wiring and no signs of corrosion on either end.

 

[TomsFocus]

Ah ok, yes it sounds like the shutters work but aren't getting any info from the PCM.  Have you tested the wiring with a multimeter or just visually looked for corrosion?  That'll be the next thing to try if not done already.

[rbitton782]

GW

Hi mate
Disconnect the grill engine plag, delete all warnings with the scanner, and then, start the engine.