Astra H 1.6 easytronic. Wiring diagram needed Aug 30, 2017Astra H 1.6 easytronic. Wiring diagram needed. Posted By Performance and Diesel.. Sunday, October 30, 2011 8:19:46 AM. 0. Engine fault code is a gearbox communication fault. Have checked the wiring harness from the fuse board to gearbox and to ECU and everything has continuity. Vauxhall Workshop Manuals > Astra H > J Engine and Engine Astra H > Vauxhall Workshop Manuals > J Engine and Engine Aggregates > DOHC Petrol Engine > Cylinder Head > Repair Instructions > Cylinder Head, Remove and Install (Z16XEP) Move crankshaft in direction of engine rotation to "cylinder 1 TDC of combustion stroke"