HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE2-773

DTC Code DTC Name
P0AE2-773 Hybrid Battery Precharge Contactor Circuit Stuck Closed

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The hybrid vehicle control ECU detects a stuck closed malfunction of a precharge relay stuck malfunction on the HV battery negative side.

    The cause of this malfunction may be one of the following:


      Inside of inverter voltage sensor (VH) circuit malfunction

    • Voltage sensor (VH) malfunction

    • Motor generator control ECU (MG ECU) malfunction

    • Communication (wire harness) malfunction


      High voltage system malfunction

    • Hybrid battery junction block assembly malfunction

DESCRIPTION

Refer to the description for DTC P0AE6-225.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0AE2-773 Hybrid Battery Precharge Contactor Circuit Stuck Closed

SMRP (precharge relay) is stuck closed due to a mechanical malfunction or other malfunction.

(2 trip detection logic)

  • Hybrid battery junction block assembly

  • Inverter with converter assembly

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0AE2-773

  • VL-Voltage before Boosting

  • Power Resource VB

The following items can be helpful when performing repairs:


WIRING DIAGRAM

Refer to the wiring diagram for the HV battery high-voltage line circuit.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • When troubleshooting DTC P0AE2-773, use either a tool wrapped with vinyl insulation tape or an insulated tool. (It is extremely dangerous when a high-voltage charge passes through a non-insulated tool causing a short.)

  • 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.

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Tech Tips

After the repair, clear the DTCs, perform the following procedure and check that the same DTC (including pending DTC) is not output.


  1. Turn the power switch off and wait for 30 seconds or more.

  2. Turn the power switch on (READY) and wait for 30 seconds or more.

  3. Turn the power switch off and wait for 60 seconds or more.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P0AE2-773 only is output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs including pending DTCs are also output. B
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0A1A-151, 155, 156, 200, 658, 659, 791, 792, 793 Generator Control Module
      P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796 Drive Motor "A" Control Module
      P0A1D-148 Hybrid Powertrain Control Module
      P324E-788 MG-ECU Power Relay Intermittent Circuit
      Power source circuit malfunction P2511-149 ECM/PCM Power Relay Sense Circuit Intermittent
      Communication system malfunction U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      Sensor and actuator circuit malfunction 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
      P0A78-266, 267, 586 Drive Motor "A" Inverter Performance
      P0A94-442 DC / DC Converter Performance
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0AA4-232 Hybrid Battery Negative Contactor Circuit Stuck Closed
      P0AE7-224 Hybrid Battery Precharge Contactor Control Circuit High
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      System malfunction P3004-132 High Voltage Power Resource

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0AE2-773 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

    A

  2. CHECK FREEZE FRAME DATA (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Read the freeze frame data of DTC P0AE2-773.

      Tech Tips

      In the freeze frame data, read the item "VL-Voltage before Boosting".

      Result
      Result Proceed to
      "VL-Voltage before Boosting" is 55 V or more. A
      "VL-Voltage before Boosting" is less than 55 V. B

      Tech Tips

      If VH-Voltage after Boosting is output even when an off command is being sent to the system main relay (positive side), P0AE2-773 is output. If the difference between the "VL-Voltage before Boosting" and the "VH-Voltage after Boosting" is large, it is determined that there is an inverter (VH sensor) malfunction.

    5. Turn the power switch off.


    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

  3. CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.

    Tech Tips


    • If a system main relay is stuck closed, inspect the hybrid battery junction block assembly without removing it from the vehicle, in order to keep the relay closed.

    • If the result of reading the freeze frame data is A, the hybrid battery junction block assembly must be replaced. Measuring resistance can determine that this is either a present or past malfunction.


    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 No. 2 hybrid vehicle battery shield reinforcement.

      Click here

    3. Disconnect the 2 high voltage cable connectors of the HV battery from the hybrid battery junction block assembly.

    4. B002JZZC04
      *a

      Component without harness connected

      (Hybrid Battery Junction Block Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      t6-1 (CEI) - x3-1 (-) Power switch off 10 kΩ or higher

    5. Reconnect the 2 high voltage cable connectors of the HV battery.

    6. Install the No. 2 hybrid vehicle battery shield reinforcement.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here