HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-550 and P0E32-564

DTC Code	DTC Name
P0A94-550	DC / DC Converter Performance
P0E32-564	DC/DC Converter Voltage Sensor "A" Range / Performance

DTC SUMMARY

MALFUNCTION DESCRIPTION
These DTCs indicate a malfunction inside the inverter for the motor. The cause of this malfunction may be one of the following:
- Internal inverter malfunction
- Internal circuit malfunction in the inverter for the motor
- Malfunction in the sensors for inverter control (current sensor, voltage sensors (VH, VL), etc.)

DESCRIPTION

For a description of the boost converter.

Click here

If a malfunction occurs in the boost converter, the MG ECU detects it and transmits this information to the hybrid vehicle control ECU.


DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A94-550	DC / DC Converter Performance	Boost converter overvoltage signal detected (circuit malfunction): Overvoltage or a circuit malfunction is detected before boosting. (1 trip detection logic)	Wire harness or connector Inverter with converter assembly	Comes on	Master Warning Light: Comes on
P0E32-564	DC/DC Converter Voltage Sensor "A" Range / Performance	Boost converter overvoltage signal detected (circuit malfunction (VL sensor)): VL sensor output (VL-Voltage before boosting) remains extremely high for a certain period of time. (1 trip detection logic)	Wire harness or connector Inverter with converter assembly	Comes on	Master Warning Light: Comes on

Table 1. Related Data List
DTC No.	Data List
P0A94-550	-
P0E32-564	VL-Voltage before Boosting

CAUTION / NOTICE / HINT

CAUTION:

Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
Click here

Tip:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here Click here Click here Click here

Tip:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

Turn the power switch on (READY) and wait for 5 seconds or more.
With the engine stopped and the shift lever in P, depress the accelerator pedal to start the engine.

PROCEDURE

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

Click here

Result


Result	Proceed to
OK	A
NG (The connector is not connected securely.)	B
NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)	C

A

REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click here

B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR