DTC    P0AE6-225    Hybrid Battery Precharge Contactor Control Circuit Low

for Preparation Click here


DESCRIPTION

The System Main Relays (SMRs) are the relays that connect or disconnect the high voltage power system in accordance with commands from the power management control ECU.
There are 3 SMRs and 1 precharge resistor. SMRB, SMRP, SMRG, and the precharge resistor are located in the hybrid battery junction block assembly in the HV battery pack.
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.
INF Code
DTC Detection Condition
Trouble Area
P0AE6
225
Short to GND in the SMRP circuit
  1. Wire harness or connector
  2. Hybrid battery junction block assembly
  3. Power management control ECU

WIRING DIAGRAM


A243886E03


INSPECTION PROCEDURE

CAUTION:
  1. 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.
  2. 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).

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

NOTICE:
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).

1.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

  1. Disconnect connector H3 from the power management control ECU.



    A204445E34

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H3-3 (SMRP) - Body ground
    		Power switch off
    		112 to 274 Ω

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)

  1. Connect the power management control ECU connector.



NG
Go to step 2
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)  

2.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID BATTERY JUNCTION BLOCK)

CAUTION:
Be sure to wear insulated gloves.

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

    NOTICE:
    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.

  1. Remove the upper hybrid battery cover sub-assembly.

  1. Disconnect connector i3 from the hybrid battery junction block assembly.

  1. Disconnect connector H3 from the power management control ECU.



    A213116E39

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H3-3 (SMRP) and i3-3 (SMRP) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)
    *b
    		Rear view of wire harness connector
    (to Hybrid Battery Junction Block Assembly)

  1. Connect the power management control ECU connector.

  1. Connect the hybrid battery junction block assembly connector.

  1. Install the upper hybrid battery cover sub-assembly.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (Click here)