HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE2-773

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

DESCRIPTION

Refer to the description for DTC P0AE6-225 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0AE2 773 Current flows through SMRP when only SMRB is ON during precharge (SMRP is stuck closed).

  • Wire harness connector

  • Hybrid vehicle control ECU

  • Hybrid vehicle converter

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AE6-225 Click here.

INSPECTION PROCEDURE

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 disconnecting 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.

Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. Check the connections of the hybrid vehicle control ECU connectors.

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

    NG

    CONNECT SECURELY

    OK

  2. CHECK CONNECTOR CONNECTION CONDITION (NO. 2 BATTERY PACK WIRE CONNECTOR)


    1. A01H29WE02

      Check the connection of the No. 2 battery pack wire connector.

      OK
      The connector is connected securely and there are no contact problems.

      Tech Tips

      For the removal and installation procedures related to inspection of the connection of the No. 2 battery pack wire connector, Click here.


    NG

    CONNECT SECURELY

    OK

  3. CHECK HARNESS AND CONNECTOR (RESISTANCE VALUE OF SMRP INSIDE HYBRID VEHICLE CONTROL ECU)


    1. Turn the power switch off.

    2. A01H29WE02

      Disconnect the No. 2 battery pack wire connector.

    3. A01GXOME09

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      nS1-11 (SMRP) - Body ground Power switch off 370 to 430 kΩ

    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR) Click here

    OK

  4. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONVERTER CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. Remove the service plug grip Click here.

      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.

    3. A01H1FE
      A01H1W0

      Check the connection of the low voltage connector of the hybrid vehicle converter.

      OK
      The connector is connected securely and there are no contact problems.

      Tech Tips

      For the removal and installation procedures related to inspection of the connection of the low voltage connector of the hybrid vehicle converter, Click here.


    NG

    CONNECT SECURELY

    OK

  5. CHECK HARNESS AND CONNECTOR (NO.2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXEHE10

      Check that the service plug grip is not installed.

    2. Disconnect the low voltage connector from the hybrid vehicle converter.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      nS1-11 (SMRP) - z82-10 (SMRP) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      nS1-11 (SMRP) or z82-10 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HV CONVERTER

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. A01GZ6KE02

      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.

    3. Disconnect the 3 high-voltage connectors of the hybrid vehicle converter from the HV battery junction block.

      Tech Tips

      For the removal and installation procedures related to the high-voltage connectors of the hybrid vehicle converter, Click here.

    4. A01H0QOE02

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

      Standard resistance

      Tester Connection

      (Tester Probe Polarity)

      		 Switch Condition Specified Condition
      z58-1 (CBD) (Positive Probe) - z60-1 (INR) (Negative Probe) Power switch off 10 kΩ or higher

      Tech Tips

      The polarities of the tester probes may differ depending on the tester. Use the current output probe of the tester as the positive probe for this measurement. To determine the polarity, use another voltmeter to confirm the current output probe of the tester. When measuring the output of the tester, the voltmeter positive probe indicates the tester current output probe.


    NG

    REPLACE HV CONVERTER Click here

    OK

  7. CHECK HV CONVERTER


    1. A01GYK7

      Check that the ground bolts for the hybrid vehicle converter are securely installed.

      OK
      The bolts are securely installed.

    NG

    CONNECT SECURELY

    OK

    REPLACE HV CONVERTER Click here

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR)


    1. Turn the power switch off.

    2. Disconnect connector A76 from the hybrid vehicle control ECU.

    3. Turn the power switch on (IG).

    4. A01H0VYE10

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

      Tech Tips

      Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A76-25 (SMRP) - Body ground Power switch on (IG) Below 1 V

    5. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A76-25 (SMRP) - nS1-11 (SMRP) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A76-25 (SMRP) or nS1-11 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here