HYBRID CONTROL SYSTEM, Diagnostic DTC:P324E-788

DTC Code DTC Name
P324E-788 MG-ECU Power Relay Intermittent Circuit

DESCRIPTION

If the MG ECU located in the inverter with converter assembly is reset due to a problem with the power source in the inverter, the power management control ECU will set this DTC.

DTC No. INF Code DTC Detection Condition Trouble Area
P324E 788 Error in reset signal from the inverter assembly power source IC

  • Wire harness or connector

  • Inverter with converter assembly

  • Power management control ECU

WIRING DIAGRAM

A01UYUKE22
*a to Auxiliary Battery
*b Power Management Control ECU
*c Inverter with Converter Assembly

CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, turn the ignition switch off and 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 ignition 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 the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Turn the ignition switch to ON (IG) and wait for 5 seconds or more.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Check if DTCs are output.

      Result
      Result Proceed to
      P324E-788 only is output. A
      U0110-159, 160, 656, 657 are also output. B

    5. Turn the ignition switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A01UY1U

      Check the connector connections and contact pressure of the low voltage connectors of the inverter with converter assembly Click here.

      Note

      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.

      OK
      The connectors are connected securely and there are no contact pressure problems.

      Tech Tips

      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

  3. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT RELAY)

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the inverter with converter assembly connector.

    3. Remove the IGCT relay from the No. 2 engine room relay block.

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

      A01V0PIE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block *2 IGCT Relay
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A33-10 (+B) - 5 (IGCT relay) Ignition switch off Below 1 Ω
      A33-9 (+B2) - 5 (IGCT relay) Ignition switch off Below 1 Ω
      A33-28 (GND1) - Body ground Ignition switch off Below 1 Ω
      A33-27 (GND2) - Body ground Ignition switch off Below 1 Ω

    5. Install the IGCT relay.

    6. Connect the inverter with converter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Check if DTCs are output.

      Result
      Result Proceed to
      Only DTC P0A1A-151, P0A1A-659 or P324E-788 is output. A
      Other than above. B

    5. Turn the ignition switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  5. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Read and record the DTCs and freeze frame data.

    5. Clear DTCs and freeze frame data.

    6. Turn the ignition switch off.


    NEXT

  6. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch off and wait for 30 seconds or more.

    3. Turn the ignition switch to ON (IG) and wait for 5 seconds or more.

    4. Turn the ignition switch to ON (READY).

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

    6. Check if DTCs are output.

      Result
      Result Proceed to
      No DTCs are output (not including history DTCs). A
      Only DTC P0A1A-151, P0A1A-659 or P324E-788 is output. B
      Other than above. C

    7. Turn the ignition switch off.


    A

    REPLACE MG CONTROL COMPUTER Click here

    B

    REPLACE POWER MODULE INTELLIGENT TRANSISTOR KIT AND MG CONTROL COMPUTER Click here

    C

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here