DTC U04B1: Invalid Data Received From Battery Monitor Module: General Description

Many control units have applied to vehicle as it becomes more eletronical. These units control their own system based on information from diverse sensors. Therefore necessity of common use of diverse sensor information and importance of stable power supply are gathering strength. The battery sensor is mounted on battery (-) terminal. It transmits battery voltage, current, temperature information to the ECM. The ECM controls generating voltage by duty cycle based on these signals.