MOTOR GENERATOR CONTROL SYSTEM, Diagnostic DTC:P1CCC96

DTC Code DTC Name
P1CCC96 DC/DC Converter Enable Component Internal Failure

DESCRIPTION

The DC/DC converter converts the DC 201.6 V of the HV battery into DC 12 V in order to supply power to areas such as the vehicle lighting system, audio system and various ECUs. Additionally, it charges the auxiliary battery.

A transistor bridge circuit initially converts DC 201.6 V into alternating current, and a transformer lowers the voltage.

The DC/DC converter controls the output voltage in order to keep a constant voltage at the terminals of the auxiliary battery.

Then, it is rectified and smoothed (into direct current) and converted into DC 12 V.

The motor generator control ECU sends a signal to the DC/DC converter to prohibit its control and receives signals indicating a normal or abnormal condition of the 12 V charging system via the NODD signal line.

If the DC/DC converter malfunctions, the vehicle will become inoperative. Therefore, the motor generator control ECU monitors the operation of the DC/DC converter and detects malfunctions.

This DTC is stored when the DC/DC converter circuit has a malfunction or its operation is prohibited by a fail-safe function, or the auxiliary battery voltage drops to 11 V or less with the power switch on (READY).

If a DC/DC converter malfunction occurs, DC/DC converter malfunction signals are sent from the DC/DC converter to the MG ECU via the NODD signal line.

This DTC may also be stored if a malfunction of the inverter cooling system (blockage, water pump malfunction, etc.) or a high-voltage insulation malfunction occurs.

B004OZXE02
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1CCC96 DC/DC Converter Enable Component Internal Failure

Either of the following conditions is met:


  • The DC/DC converter is malfunctioning and the auxiliary battery voltage is 11 V or less.*

  • The DC/DC converter is malfunctioning for 120 seconds and the inverter coolant temperature is 70 °C or less.

(1 trip detection logic)

  • Fusible link block assembly

  • Engine wire

  • Inverter cooling system

  • Cooling fan system

  • Grille shutter system

  • Inverter with converter assembly

  • Hybrid vehicle transaxle assembly

  • Motor cable

 Does not come on

Master Warning Light:

Comes on

Tech Tips

*: If the DC/DC converter is malfunctioning, its operation and charging will be stopped and the auxiliary battery voltage will drop.

WIRING DIAGRAM

Refer to the wiring diagram for the Generator High-voltage Circuit.

Click here

Refer to the wiring diagram for the Motor High-voltage Circuit.

Click here

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

    Tech Tips

    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

Tech Tips


  • After repair, clear the DTCs, turn the power switch off and wait for 30 seconds or more and perform the following procedure to confirm that the auxiliary battery low voltage indicated by this DTC has been repaired.


    1. Wait for 2 minutes with park (P) selected, the power switch on (READY) and the following conditions met, then confirm that Data List item "BATT Voltage (Hybrid control system)" is between 13.0 and 15.0 V.

      (If charging is not performed and the electrical load increases, +B voltage may not be steady and will gradually drop.)


      1. Headlight switch is in the HI position.

      2. A/C blower fan switch is in the HI position.

      3. Window defogger switch is turned on.

  • By performing the following procedure, the DC/DC converter function can be checked.


    1. Connect the AC/DC 400 A probe to the positive (+) auxiliary battery cable.


      1. Turn the power switch on (READY) and leave the vehicle as is until the electric current flowing to the auxiliary battery becomes 10 A or less.

      2. Turn the power switch on (READY) and turn the headlight switch and A/C blower fan switch to the HI position and the window defogger on.

      3. Confirm that the current drawn from the auxiliary battery is 0 A or lower and the auxiliary battery voltage is between 12.5 and 15.0 V.


  • This DTC may be also stored when a part other than the DC/DC converter is malfunctioning or depending on user operation.


  • If this vehicle is used to jump start another vehicle with a discharged battery, a fuse may blow due to overcurrent or the DC/DC converter self-protection may be activated. Also, if this vehicle is jump started by a vehicle with a 24 V battery, the same malfunction may occur and this DTC may be stored. (The suspended DC/DC converter control will return to normal by clearing the DTCs and turning the power switch off.)


  • Confirm that high electrical load equipment such as a high-capacitance audio device or electric kettle is used in the vehicle. (A fuse of the auxiliary battery may be blown due to overcurrent.)


  • If the DC/DC converter is malfunctioning, the auxiliary battery cannot be charged. Therefore, once the power switch is turned off, it may be impossible to turn it on (READY) again if the auxiliary battery is completely discharged. In this case, charge the auxiliary battery. Be careful as charging is not performed during the inspection.


  • If the power switch turns off immediately after it is turned on (READY), the auxiliary battery voltage may be low. Charge the auxiliary battery.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Engine, Hybrid Control and Motor Generator / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Engine > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P1CCC96 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid control system in the table below are output. B
      DTCs of motor generator control system in the table below are output. C
      DTCs of SFI system in the table below are output. D
      Table 1
      Malfunction Content System Relevant DTC
      Insulation Malfunction Hybrid control system P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
      High Voltage Circuit Malfunction Hybrid control system P0AA649 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure
      P0AD911 Hybrid/EV Battery Positive Contactor Circuit Short to Ground
      P0ADD11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground
      P0AE411 Hybrid/EV Battery Precharge Contactor Circuit Short to Ground
      P1C8449 High Voltage Power Resource Circuit Short during Ready ON
      P300449 High Voltage Power Resource Circuit Short during Pre-Charge
      Table 2
      Malfunction Content System Relevant DTC
      System malfunction Hybrid control system P0A9300 Inverter "A" Cooling System
      P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A31 Motor Electronics Coolant Pump "A" No Signal
      Motor generator control system P0E5717 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      SFI system P059F73 Active Grille Air Shutter "A" Actuator Stuck Closed
      P05A072 Active Grille Air Shutter "A" Actuator Stuck Open
      P05A074 Active Grille Air Shutter "A" Actuator Slipping
      P05A211 Active Grille Air Shutter "A" Circuit Short to Ground
      P05A212 Active Grille Air Shutter "A" Circuit Short to Battery
      P05A213 Active Grille Air Shutter "A" Circuit Open
      P05A27E Active Grille Air Shutter "A" Actuator Stuck On
      P05A27F Active Grille Air Shutter "A" Actuator Stuck Off
      P05B112 Active Grille Air Shutter "B" Circuit Short to Battery
      P05B114 Active Grille Air Shutter "B" Circuit Short to Ground or Open
      P05B131 Active Grille Air Shutter "B" No Signal
      U028487 Lost Communication with Active Grille Air Shutter Module "A" Missing Message

      Tech Tips

      P1CCC96 may be output as a result of the malfunction indicated by the DTCs above.


      1. The chart above is listed in inspection order of priority.

      2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) Click here

    D

    GO TO DTC CHART (SFI SYSTEM) w/ Canister Pump Module: Click here
    GO TO DTC CHART (SFI SYSTEM) w/o Canister Pump Module: Click here

    A

  2. CHECK FUSIBLE LINK (DC/DC)


    1. Disconnect the cable from the negative (-) auxiliary battery.

    2. B004Q2HC01
      *1 Fusible link block assembly

      Check the fusible link block assembly (DC/DC) for improper installation.

      OK
      The fusible link block assembly is installed securely.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Fusible link block assembly terminal 1 - 2 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY (DC/DC)

    OK

  3. CHECK AMD TERMINAL VOLTAGE

    CAUTION:

    Be sure to wear insulated gloves.


    1. Connect the cable to the negative (-) auxiliary battery terminal.

    2. B004QTRE01

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      D2-1 (AMD) - Body ground Power switch off Same as auxiliary battery voltage

    3. Disconnect the cable from the negative (-) auxiliary battery terminal.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY (DC/DC)

    OK

  4. CHECK AMD TERMINAL CONNECTION CONDITION

    CAUTION:

    Be sure to wear insulated gloves.


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

      Note

      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.

    2. B004P3O

      Check that the bolts for the AMD terminal are tightened to the specified torque, the AMD terminal is connected securely, and there are no contact problems.

      Torque
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Result
      Result Proceed to
      There are no arc marks. The terminal is connected securely and there are no contact problems. A
      There are no arc marks. The terminal is not connected securely and there is a contact problem. B
      There are arc marks. - C

    B

    CONNECT SECURELY

    C

    REPLACE MALFUNCTIONING PARTS

    A

  5. CHECK ENGINE WIRE

    CAUTION:

    Be sure to wear insulated gloves.


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

      Note

      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.

    2. Remove the engine wire from the AMD terminal (inverter with converter assembly side and auxiliary battery side).

    3. B004QG3C02
      *1 Engine Wire

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D3-1 (AMD) - D2-1 (AMD) Always Below 1 Ω

    4. Install the engine wire.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE WIRE Click here

    OK

  6. CHECK COOLING SYSTEM

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  7. CHECK DC/DC CONVERTER FUNCTION

    Tech Tips

    The current at the AMD terminal cannot be measured directly because of space limitations. Measure the current flowing at the auxiliary battery instead.


    1. Connect the AC/DC 400 A probe of the tester to the positive (+) auxiliary battery cable.

    2. Install the service plug grip.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (READY) and leave the vehicle as it is until the electric current flowing to the auxiliary battery becomes 10 A or less.

      Tech Tips

      If the power switch turns off immediately after it is turned on (READY), auxiliary battery voltage may be low. Recharge the auxiliary battery and perform this procedure again.

    5. B004PPQC08
      *a Probe Direction
      *b Current Flowing to Auxiliary Battery
      B004PDQC08
      *a Probe Direction
      *b Current Flowing from Auxiliary Battery

      Measure the current flowing from the auxiliary battery with the power switch on (READY), the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on.

      Standard Current
      Item Condition Specified Condition
      Current flowing from auxiliary battery

      Power switch on (READY)

      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)

      0 A or less

      (no current from auxiliary battery)

    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Item Condition Specified Condition
      Auxiliary battery voltage

      Power switch on (READY)

      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)

      		 12.5 to 15 V

    7. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    NG

  8. CHECK HIGH VOLTAGE INSULATION

    CAUTION:

    Be sure to wear insulated gloves.


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

      Note

      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.

    2. Remove the inverter cover from the inverter with converter assembly.

    3. B004R1BE01

      Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-1 (W) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-2 (U) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-3 (V) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-4 (W) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-5 (U) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-6 (V) - Body ground and shield ground Power switch off 10 MΩ or higher

      Tech Tips

      Perform this inspection while the motor cable are connected.

    4. Install the inverter cover to the inverter with converter assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HV CONVERTER KIT Click here

    NG

  9. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  10. CHECK MOTOR HIGH-VOLTAGE CIRCUIT

    Click here

    Tech Tips

    If the "Motor High-voltage Circuit" inspection results are normal, perform the next step.

    Result
    Proceed to
    NEXT

    NEXT

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here