Volvo Immo fault ECU - BCM / CEM module synchro No Crank No start Fault codes ECM-C301 & 326 CEM-3A0

Today we are repairing a Volvo V40 (Other models have similar fault) with a 'No crank - No start' situation after a flat battery which causes an immobiliser synchronisation fault - Displaying fault codes in the ECU as: ECM-C301 ‘Control Module, Faulty Software Checksum ECM’ & ECM-326 ‘Communication Control Module Faulty Signal’ & Fault codes in the CEM unit: CEM-3A00 ‘ECM Software faulty signal’ If you have this fault on your Volvo you can post the items detailed in the video to us for re-synchronising, this can also be performed if replacing the ABS pump, ECU or BCM! Visit our website for all of your ECU programming needs! www.ecuconnection.co.uk https://ecuconnection.co.uk/product/v... Diagnostic tool used to diagnose this fault is the Thinkcar MAX which can be purchased here: https://ecuconnection.co.uk/product-c...