DTC P0A94-587: DC / DC Converter Performance [02/2014 - 11/2016]: Description

For a description of the boost converter.

The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before it is boosted. The ECU also uses the battery voltage sensor to detect HV battery voltage (VB).

HINT:

Using the Techstream, check the Data List values of "Power Resource VB" and "Batt Pack Current Val". If these values are not within the range below, there is a malfunction in the battery voltage sensor circuit.

Fig 1: HV Battery Voltage To HV Battery Current Graph

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A94-587	DC / DC Converter Performance	Voltages from HV battery voltage (VB) sensor and boost converter voltage (VL) sensor deviate: Difference between "VL-Voltage before Boosting" and "Power Resource VB" is large when the boosting request is given. (1 trip detection logic)	Inverter with converter assembly Battery voltage sensor	Comes on	Master Warning Light: Comes on

RELATED DATA LIST

DTC No.	Data List
P0A94-587	Power Resource VB VL-Voltage before Boosting VH-Voltage after Boosting Boost Ratio