DTC P16B3 (01): Power Command Signal Circuit Low Input: General Description

The ECM (engine control module) sends signals that command the motor output (CMDPWR) to the MCM (motor control module) by the pulse width modulation (PWM) signal duty. The signal duty is converted into voltage via an integrator circuit in the MCM, and the CPU reads it as analog data. The duty that is used for control is set between 10 % - 90 % (equivalent to 0.5 V - 4.5 V), so it stays out of the range of a malfunction such as an open in the signal wire or a short to ground. If the MCM reads voltage lower than a set range, a short to ground in the signal wire is detected and a DTC is stored.