Coming from Detroit: Networks on wheels: Multiplexed wiring in new models promises cost-effective control and accurate diagnostics, as well as fewer wires and less redundancy

The ever-increasing electronic content of cars is a mixed blessing for carmakers. Advanced electronic features like antilock braking, electronic steering, and electronically controlled transmissions and suspensions can improve performance and promote the sale of cars. But the wiring, components, and electronic control units required for these systems must fight for space in today's smaller cars, where they may invite diagnostic and repair problems.