DTC P0A94-442: DC / DC Converter Performance [02/2014 - 11/2016]: Description
The boost converter boosts the 288 V DC from the HV battery to a maximum of approximately 650 V DC. The inverter converts the voltage that has been boosted by the boost converter into alternating current, which is used for driving generator (MG1) and motor (MG2). When a motor or generator operates as a generator, the alternating current that it creates is converted into direct current by the inverter. Then the boost converter drops this voltage to direct current of approximately 288 V in order to charge the HV battery.
The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before it is boosted. It also uses a voltage sensor (VH) that is built into the inverter to detect the high voltage after it is boosted. Based on the voltage before and after it is boosted, the MG ECU controls the operation of the boost converter to boost the voltage to the target voltage.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A94-442 | DC / DC Converter Performance | Abnormal voltage execution value: Boosting cannot be performed as requested due to a boost converter system malfunction. (1 trip detection logic) |
|
Comes on | Master Warning Light: Comes on |
HINT:
With the vehicle stopped, apply the parking brake and turn the power switch on (READY).
With the shift lever in P, depress the brake pedal firmly, and quickly and fully depress the accelerator pedal.
Immediately after the accelerator pedal is fully depressed, "VH-Voltage after boosting" will be between 400 and 650 V.
| DTC No. | Data List |
|---|---|
| P0A94-442 | VH-Voltage after Boosting |