b1416 fault code e300td help please

[tonka12]

my air con has stopped working so i plugged it in and the code says b1416 and it wont clear .any ideas what i should be looking at cheers in advance russ

 

[autopian]

it refers to the coolant circulation pump, check the fuse, should be fuse 4 and be perm live, it also feeds the control module at pin 1, if ok then check at pin 1 at the pump for battery voltage if ok again then check the pump pin 2 for the negative control feed.
by checking feeds i would also include volt dropping.
check the pump by checking ohms across pins 1+2 at the pump with the multiplug connector disconnected.
cheers
chris

 

[tonka12]

thanks i will check that cheers russ