Hi all,

I have been reading through your forum quite a bit to hopefully solve a problem I I have encountered with my big turbo build on my 2002 Audi TT 225, bam.

Parts list are:
-Integrated Engineering 06A 1.8T Stage 2 Stroker Short Block
-Integrated Engineering 1.8T 20V Stage 1 AEB Cylinder Head
-Integrated Engineering Intake manifold
-Precision HP5558SP-B Turbo
-Precision 39mm External Wastegate 
-3" Inlet Pipe Kit
-CTS Front Mount Intercooler kit
-630cc injectors
-044 Bosch fuel pump
-6AN fuel lines
-3 Bar FPR
-80mm Hemi Throttle Body
-Audi TT 225 stock MAF
-NGK BKR7EIX Spark plugs 
-Decat test pipe
-42dd non resonated exhaust.

Tried to do first start up and this code came up,

17072-ECM power relay load circuit P0688 35-00 open circuit.

and was hoping someone might point me in the right direction of things to check apart from fuses and replace the relay. I have relocated the battery to the boot, and I am thinking maybe I touched something during the build and can't work it out.
While cranking, I am getting fuel to the rail, but no spark. I understand that before the ecu will activate the Relay it still needs feeds from other sensors, does anyone know what sensors I need to check?

Many thanks.