DTC    P0A94-554    DC / DC Converter Performance

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DESCRIPTION

INSPECTION PROCEDURE

CAUTION:

1. 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.
   
2. After disconnecting 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.
   

HINT:

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

1. Connect the intelligent tester to the DLC3.
   

2. Turn the power switch on (IG).
   

3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
   

4. Check if DTCs are output.
   

   Result:

   Result	Proceed to
   DTC P0A94-554 only is output.	A
   Any of the following DTCs are also output.	B

   
   

   DTC No.	Relevant Diagnosis
   P0A1A (all INF codes)*1	Generator Control Module
   P0A1B (all INF codes)*1	Drive Motor "A" Control Module
   P0A1D (all INF codes)*1	Hybrid Powertrain Control Module
   P0A3F-243	Drive Motor "A" Position Sensor Circuit
   P0A40-500	Drive Motor "A" Position Sensor Circuit Range / Performance
   P0A41-245	Drive Motor "A" Position Sensor Circuit Low
   P0A4B-253	Generator Position Sensor Circuit
   P0A4C-513	Generator Position Sensor Circuit Range / Performance
   P0A4D-255	Generator Position Sensor Circuit Low
   P0A60 (all INF codes)*1	Drive Motor "A" Phase V Current
   P0A63 (all INF codes)*1	Drive Motor "A" Phase W Current
   P0A72 (all INF codes)*1	Generator Phase V Current
   P0A75 (all INF codes)*1	Generator Phase W Current
   P0A78-266, 267, 287, 505, 506, 586, 806, 807, 808	Drive Motor "A" Inverter Performance
   P0A7A-325, 517, 518, 809, 810, 811	Generator Inverter Performance
   P0A94-585, 587, 589, 590	DC / DC Converter Performance
   P0C76-523	Hybrid Battery System Discharge Time Too Long

   HINT:

   1. *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
      
   2. P0A94-554 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
      

5. Turn the power switch off.
   

B	GO TO DTC CHART (Click here)

A

CAUTION:

Be sure to wear insulated gloves.

1. Check that the service plug grip is not installed.
   

   NOTICE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

NOTICE:

Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

2. Check the connection of the low voltage connector of the inverter with converter assembly.
   

   OK:

   The connector is connected securely and there are no contact problems.
   

   HINT:

   When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.

NG	CONNECT SECURELY

OK
REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)