DTC : P0A94: General Description
The auto idle stop system equipped vehicle uses the DC-DC converter to prevent electronic accessory reset due to 12 volt battery voltage lowering when recovering (starter motor running) from idle stop condition. The DC-DC converter is connected with CST line which the powertrain control module (PCM) sends a voltage boost request and the local interconnect network (LIN) line which the DC-DC converter sends a diagnostic result to the PCM. When the self diagnostic circuit in the DC-DC converter detects a failure, it is noticed to the PCM via the LIN line. If the PCM receives a DC-DC converter failure information for a set time, the PCM detects a DC-DC converter performance problem and stores a DTC.