HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE6-225

DTC Code DTC Name
P0AE6-225 Hybrid Battery Precharge Contactor Control Circuit Low

DESCRIPTION

The SMRs (System Main Relays) are the relays that connect or disconnect the high voltage power system in accordance with commands from the hybrid vehicle control ECU.

There are 3 SMRs and 1 system main resistor. SMRB, SMRP, SMRG, and the system main resistor are located in the HV battery junction block assembly.

To connect to the high voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. To shut off the high voltage power system, SMRB and SMRG are turned off.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0AE6-225

Hybrid Battery Precharge Contactor Control Circuit Low

Short to ground in the SMRP circuit:

Primary circuit of SMRP is malfunctioning.

(2 trip detection logic)

  • Wire harness or connector

  • HV battery junction block assembly

  • Hybrid vehicle control ECU

Does not come on

Master Warning Light:

Comes on
Table 1. Related Data List

DTC No.

Data List

P0AE6-225

  • VL-Voltage before Boosting

  • VH-Voltage after Boosting

  • Power Resource VB

  • SMRP Status

  • SMRB Status

  • SMRG Status

  • SMRP Control Status

  • SMRB Control Status

  • SMRG Control Status

  • Conv Shutdown

  • MG2 Inverter Shutdown

  • MG1 Inverter Shutdown

WIRING DIAGRAM

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

    Tip:

    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

Tip:

  • If DTC P0AE6-225 is output, the power switch cannot be turned on (READY).

  • 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 HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND)

    1. Disconnect the G193 hybrid vehicle control ECU connector.

    2. A311547C88

      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G193-3 (SMRP) - Body ground

      Power switch off

      141 to 212 Ω

    3. Reconnect the G193 hybrid vehicle control ECU connector.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE HYBRID VEHICLE CONTROL ECU

    Click here

    NG

  2. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT SECURELY

    OK

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

    Click here

    Result

    Result

    Proceed to

    OK

    A

    NG (The connector is not connected securely.)

    B

    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)

    C
    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - HV BATTERY JUNCTION BLOCK ASSEMBLY)

    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 No. 2 hybrid vehicle battery shield reinforcement.

      Click here

    3. Disconnect the y1 HV battery junction block assembly connector.

    4. Disconnect the G193 hybrid vehicle control ECU connector.

    5. A350454C09

      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      *b

      Rear view of wire harness connector

      (to HV Battery Junction Block Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G193-3 (SMRP) or y1-3 (SMRP) - Body ground and other terminals

      Power switch off

      10 kΩ or higher

    6. Reconnect the G193 hybrid vehicle control ECU connector.

    7. Reconnect the y1 HV battery junction block assembly connector.

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

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR