"Shut that door!" – Another top tip from Professor Rob

Shut That Door!

Vehicle diagnostic checking – always remember to shut the doors first or else there is a real chance your diagnostic tester won’t communicate with the car you are connected to.

Many vehicles (particularly Germanic ones) will restrict high level ECU access with the doors open or if the interior lights are on. Basic entry level EOBD readers pick codes from around the ECU core data..…but to go right into an ECU at a higher level using OEM type communication protocols – then many ECU’s only exchange data with the doors shut & interior lights off – so always remember to Shut That Door!