DTC P0A94-557: DC / DC Converter Performance [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Result

   Result	Proceed to
   P0A94-557 only is output, or DTCs except the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   Relevant Diagnosis
   P06B0-163	Sensor Power Supply "A" Circuit / Open
   P06D6-511	Sensor Reference Voltage "F" Circuit / Open
   P06E6-164	Sensor Power Supply "C" Circuit / Open
   P0A1A-151, 166, 517, 658, 791, 809	Generator Control Module
   P0A1B-198, 503, 505, 547, 554, 786, 794, 806	Drive Motor "A" Control Module
   P0A1D (all INF codes)*1	Hybrid Powertrain Control Module
   P0A3F-243	Drive Motor "A" Position Sensor Circuit
   P0A40-500, 504, 506, 549, 556, 808	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, 518, 811	Generator Position Sensor Circuit Range / Performance
   P0A4D-255	Generator Position Sensor Circuit Low
   P0A78-113, 128, 279, 284, 286, 287, 548, 555, 807	Drive Motor "A" Inverter Performance
   P0A7A-122, 130, 322, 324, 325, 810	Generator Inverter Performance
   P0A90-509	Drive Motor "A" Performance
   P0A92-521	Hybrid Generator Performance
   P0A94-172, 553	DC / DC Converter Performance
   P0BEA-290	Drive Motor "A" Phase V Current Sensor Circuit Range / Performance
   P0BEE-298	Drive Motor "A" Phase W Current Sensor Circuit Range / Performance
   P0C19-306	Drive Motor "A" Torque Delivered Performance
   P0C73-776	Motor Electronics Coolant Pump "A" Control Performance
   P0C76-523	Hybrid Battery System Discharge Time Too Long
   P0CA3-442	DC/DC Converter Step Up Voltage Performance
   P0D2E-586	Drive Motor "A" Inverter Voltage Sensor Circuit Range / Performance
   P0D2F-266	Drive Motor "A" Inverter Voltage Sensor Circuit Low
   P0D30-267	Drive Motor "A" Inverter Voltage Sensor Circuit High
   P0E05-328	Generator Phase V Current Sensor Circuit Range / Performance
   P0E09-336	Generator Phase W Current Sensor Circuit Range / Performance
   P0E32-585	DC/DC Converter Voltage Sensor "A" Range / Performance
   P0E33-589	DC/DC Converter Voltage Sensor "A" Low
   P0E34-590	DC/DC Converter Voltage Sensor "A" High
   P0E71-344	Generator Torque Delivered Performance
   P1C2A-155	Generator A/D Converter Circuit
   P1C2B-192	Drive Motor "A" A/D Converter Circuit
   P1C2D-587	Hybrid Battery Voltage / DC/DC Converter Voltage Correlation
   P1C3C-294	Drive Motor "A" Phase V Current Sensor Correlation
   P1C3D-302	Drive Motor "A" Phase W Current Sensor Correlation
   P1C3E-333	Generator Phase V Current Sensor Correlation
   P1C3F-341	Generator Phase W Current Sensor Correlation
   P1C4A-288	Drive Motor "A" Phase V Current Sensor Sub Circuit Range / Performance
   P1C4F-296	Drive Motor "A" Phase W Current Sensor Sub Circuit Range / Performance
   P1C54-326	Generator Phase V Current Sensor Sub Circuit Range / Performance
   P1C59-334	Generator Phase W Current Sensor Sub Circuit Range / Performance
   P1C6D-501	Drive Motor "A" Phase V Current Sensor Offset Range / Performance
   P1C6E-502	Drive Motor "A" Phase W Current Sensor Offset Range / Performance
   P1C71-515	Generator Phase V Current Sensor Offset Range / Performance
   P1C72-516	Generator Phase W Current Sensor Offset Range / Performance
   P1C73-512	Sensor Standard Voltage "F" Circuit / Open
   P1CA6-156	Generator Control Module Malfunction
   P1CA7-193	Drive Motor Control Module Malfunction
   P1CAC-200	Generator Position Sensor Angle Malfunction
   P1CAD-168	Drive Motor "A" Position Sensor Angle Malfunction
   P1CAF-792	Generator Position Sensor REF Signal Cycle Malfunction
   P1CB0-795	Drive Motor "A" Position Sensor REF Signal Cycle Malfunction
   P1CB2-793	Generator Position Sensor REF Signal Stop Malfunction
   P1CB3-796	Drive Motor "A" Position Sensor REF Signal Stop Malfunction
   P3133-659	Communication Error from Generator to Drive Motor "A"
   P3134-661	Communication Error from Drive Motor "A" to Generator
   P314A-828	Inverter Coolant Pump Speed Signal

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0A94-557 may be stored due to a malfunction which also causes DTCs in the preceding table to be stored. 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. After troubleshooting and repairing all output DTCs, be sure to replace the inverter with converter assembly.
5. Turn the power switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] )

Result: 

A 

See step  2

Refer to PROCEDURE - Step 4

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

Refer to PROCEDURE - Step 3

Result: 

B 

ADD HV COOLANT 

Result: 

C 

INSPECT FOR HV COOLANT LEAK AND ADD HV COOLANT 

Result: 

A 

See step  4

Refer to PROCEDURE - Step 4

Result: 

NG 

CORRECT THE PROBLEM 

Result: 

OK 

See step  5

Refer to PROCEDURE - Step 5

Result: 

NG 

CHECK COOLING FAN SYSTEM 

(Refer to Cooling Fan Circuit [10/2015 - ] )

Result: 

OK 

See step  6

Refer to PROCEDURE - Step 16

Result: 

B 

See step  21

Result: 

A 

See step  7

Refer to PROCEDURE - Step 3

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

Refer to PROCEDURE - Step 4

Result: 

NG 

See step  22

Result: 

OK 

See step  9

Refer to PROCEDURE - Step 5

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

Refer to PROCEDURE - Step 6

Result: 

NG 

See step  24

Result: 

OK 

See step  11

Refer to PROCEDURE - Step 9

Result: 

B 

REPLACE MALFUNCTIONING PARTS 

Result: 

C 

CONNECT SECURELY 

Result: 

A 

See step  12

Refer to PROCEDURE - Step 10

Result: 

B 

REPLACE MALFUNCTIONING PARTS 

Result: 

C 

CONNECT SECURELY 

Result: 

A 

See step  13

Refer to PROCEDURE - Step 11

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

Result: 

OK 

See step  14

Refer to PROCEDURE - Step 12

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

Result: 

OK 

See step  15

Refer to PROCEDURE - Step 13

Result: 

NG 

See step  26

Result: 

OK 

See step  16

Refer to PROCEDURE - Step 14

Result: 

NG 

REPAIR OR REPLACE POWER SOURCE CIRCUIT 

Result: 

OK 

See step  17

Refer to PROCEDURE - Step 15

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  18

Refer to PROCEDURE - Step 16

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

(Refer to COMPONENTS [10/2015 - ] )

Result: 

OK 

See step  19

Refer to PROCEDURE - Step 7

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  20

Refer to PROCEDURE - Step 8

Result: 

OK 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

NG 

CONNECT SECURELY 

Refer to PROCEDURE - Step 7

COMPLETED 

Refer to PROCEDURE - Step 9

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  23

Refer to PROCEDURE - Step 10

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

Refer to PROCEDURE - Step 11

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  25

Refer to PROCEDURE - Step 12

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

Refer to PROCEDURE - Step 23

Result: 

NG 

See step  28

Result: 

OK 

See step  27

(Refer to COMPONENTS [10/2014 - ] )

NEXT 

REPLACE FUSE (INV) 

NEXT 

REPLACE FUSE (INV)