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Home >> Toyota >> 2011 >> Camry Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 100 (Hybrid Vehicle Control System (P311) (Hybrid) (Diagnostic Codes (P0A78-284 - P0AA1-231)) >> Hybrid Control System >> DTC P0A94-557: DC / DC Converter Performance >> Procedure

DTC P0A94-557: DC / DC Converter Performance: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      DTC No. Relevant Diagnosis
      P0A1A (all INF codes) *1 Generator Control Module
      P0A1B (all INF codes) *1 Drive Motor "A" Control Module
      P0A1D (Except INF code 390) 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
      P0A78-113, 128, 266, 267, 279, 284, 286, 287, 306, 503, 504, 505, 506, 523, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A7A-122, 130, 322, 324, 325, 344, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A92-521 Hybrid Generator Performance
      P0A94-172, 442, 547, 548, 549, 553, 554, 555, 556, 585, 587, 589, 590 DC/DC Converter Performance

      HINT: 

      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart above.
      • Turning the power switch on (IG) with the service plug grip and inverter cover removed causes interlock switch system DTC P0A0D-350 to be output.
      • P0A94-557 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

    YES → GO TO  DIAGNOSTIC TROUBLE CODE CHART  DTC CHART 

    NO: Go to next step 

  2. CHECK AMOUNT OF GASOLINE See step   2 

    NG → REFUEL VEHICLE 

    OK: Go to next step 

  3. CHECK ENGINE START See step   3 

    OK → See step   6 

    NG: Go to next step 

  4. INSPECT CRANKSHAFT PULLEY REVOLUTION (P POSITION) See step   4 

    OK → See step   6 

    NG: Go to next step 

  5. INSPECT CRANKSHAFT PULLEY REVOLUTION (N POSITION) See step   5 

    NG → See step   42 

    OK → REPAIR OR REPLACE ENGINE ASSEMBLY 

  6. CHECK QUANTITY OF HV COOLANT See step   3 

    B → ADD COOLANT 

    C → CHECK FOR COOLANT LEAKS AND ADD COOLANT 

    A: Go to next step 

  7. CHECK COOLANT HOSE See step   4 

    NG → CORRECT THE PROBLEM 

    OK: Go to next step 

  8. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) See step   5 

    NG → See step   26 

    OK: Go to next step 

  9. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) See step   6 

    NG → See step   21 

    OK: Go to next step 

  10. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR). Refer to  PROCEDURE - Step 4 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to  PROCEDURE - Step 3 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  12. CHECK GENERATOR RESOLVER. Refer to  PROCEDURE - Step 4 

    NG → See step   22 

    OK: Go to next step 

  13. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER). Refer to  PROCEDURE - Step 3 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  14. CHECK MOTOR RESOLVER. Refer to  PROCEDURE - Step 4 

    NG → See step   24 

    OK: Go to next step 

  15. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION). Refer to  PROCEDURE - Step 5 

    NG → TIGHTEN TO SPECIFIED TORQUE 

    OK: Go to next step 

  16. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION). Refer to  PROCEDURE - Step 4 

    NG → TIGHTEN TO SPECIFIED TORQUE 

    OK: Go to next step 

  17. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1). Refer to  PROCEDURE - Step 6 

    NG → See step   42 

    OK: Go to next step 

  18. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2). Refer to  PROCEDURE - Step 7 

    NG → See step   42 

    OK: Go to next step 

  19. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 5 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  20. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 5 

    NG → CONNECT SECURELY 

    OK → See step   43 

  21. CHECK CONNECTOR CONNECTION CONDITION (COOLING FAN MOTOR CONNECTOR) See step   8 

    NG → CONNECT SECURELY 

    OK → See step   44 

  22. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 5 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  23. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to  PROCEDURE - Step 6 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   42 

  24. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 5 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  25. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER). Refer to  PROCEDURE - Step 6 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   42 

  26. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) See step   9 

    OK → ADD COOLANT 

    NG: Go to next step 

  27. CHECK FUSE (INV W/P FUSE) See step   10 

    NG → See step   33 

    OK: Go to next step 

  28. CHECK ENGINE ROOM R/B See step   11 

    NG → REPAIR OR REPLACE ENGINE ROOM R/B 

    OK: Go to next step 

  29. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR & BRACKET ASSEMBLY CONNECTOR) See step   12 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  30. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR). Refer to  PROCEDURE - Step 3 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  31. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR POWER SOURCE CIRCUIT) See step   14 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  32. CHECK WATER PUMP WITH MOTOR & BRACKET ASSEMBLY See step   15 

    NG → See step   45 

    OK → See step   46 

  33. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR & BRACKET ASSEMBLY CONNECTOR) See step   16 

    NG → See step   38 

    OK: Go to next step 

  34. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR). Refer to  PROCEDURE - Step 3 

    NG → See step   39 

    OK: Go to next step 

  35. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR POWER SOURCE CIRCUIT) See step   18 

    NG → See step   40 

    OK: Go to next step 

  36. CHECK WATER PUMP WITH MOTOR & BRACKET ASSEMBLY See step   19 

    NG → See step   41 

    OK: Go to next step 

  37. REPLACE HYBRID VEHICLE CONTROL ECU See step   20 

    NEXT → REPLACE FUSE (INV W/P) 

  38. CONNECT SECURELY See step   21 

    NEXT → REPLACE FUSE (INV W/P) 

  39. CONNECT SECURELY See step   22 

    NEXT → REPLACE FUSE (INV W/P) 

  40. REPAIR OR REPLACE HARNESS OR CONNECTOR See step   23 

    NEXT → REPLACE FUSE (INV W/P) 

  41. REPLACE WATER PUMP WITH MOTOR & BRACKET ASSEMBLY See step   24 

    NEXT → REPLACE FUSE (INV W/P) 

  42. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL 
  43. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL 
  44. CHECK COOLING FAN SYSTEM. Refer to  ON-VEHICLE INSPECTION 
  45. ADJUST WATER PUMP WITH MOTOR & BRACKET ASSEMBLY. Refer to  REMOVAL 
  46. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL 
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