Normally power steering control unit only activates steering assist when engine is running.
Now we have found a way to activate this while keeping the diesel engine off, used method needs CAN software though.
This way one can listen to any steering noises that would otherwise be drowned out by the engine, useful for diagnostics. The electrical motor is pretty quiet but noticable at engine off.
Update: There’s also a harsh method – just stall the engine deliberately – power steering keeps ON till ignition off.
- Boxer Diesel
- ECU Analysis
- ECU Definitions