If you can get the car hooked up to a professional OBD scanner they will talk to the FBH.
My Launch 431 tells me the resistance of the glow plug and the combustion fan and dosing pump can be tested in forced output menus 😉
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Newbies do now!!
1. Plenum drains..all 3 or 4 year dependent
2. Cooling fan..All speeds functioning
3. Bonnet cable divider block
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