HELP! Check engine: Daughter board communication error

godro3030 · Post by **godro3030** » Tue Jun 29, 2010 3:45 pm

Hi, i have a intermitent problem, sometimes i start my EK with k20z1 and chek engine light go on, error code: Daughter board communication error (battery voltage low when cranking). sometime when i try to start, it wont, its just make a noise like ''Tic, tic, tic'' and finnaly start normaly. I have change the battery and the starter, and problem still the same... same ''tic, tic''... and same chek engine even when the car seems to start normaly without the ''tic,tic'' noise. i have chek the voltage at the battery and at the starter.. everything ok.. but still have a daughter board communication error (battery voltage low when cranking).
I NEED HELP

sorry for my bad english..

thanks

Post by **Spunkster** » Tue Jun 29, 2010 4:22 pm

The battery voltage is too low when cranking, that is why the main relay is clicking and you are getting this error. Use a multimeter to check the voltage at teh ECU when cranking.

Umran · Post by **Umran** » Fri Jul 30, 2010 2:59 pm

Can this error be dangerous to k-pro ?

Post by **Spunkster** » Fri Jul 30, 2010 3:21 pm

Any issue should always be resolved as soon as possible...this is the nature of problems.

godro3030 · Post by **godro3030** » Tue Aug 03, 2010 9:44 am

I have fixed my problem by changing my battery pole connector.. now my car start every time but still give me a (daughter.... low voltage when cranking chek engine).. my battery voltage is ok, my engine is grounded from everywere.. can i disabled something on kpro to cancell this chek engine? thanks