DTC    P0AEF-275    Open or Short to GND in Motor Inverter Temperature Sensor Connection

DTC    P0AF0-274    Short to B+ in Motor Inverter Temperature Sensor Connection

for Preparation Click here


DESCRIPTION

  1. The MG ECU located in the w/ converter inverter assembly detects the temperature of the front motor inverter using the temperature sensor built into the w/ converter inverter assembly. The inverter cooling system is the same as that for the Motor or Generator, and operates independently of the engine cooling system. The characteristics of the front motor inverter temperature sensor are the same as that of the boost converter temperature sensor. The MG ECU limits the load based on signals sent from the front motor inverter temperature sensor in order to check the effect of the inverter cooling system and prevent overheat. The MG ECU also detects a malfunction in the front motor inverter temperature sensor connection and in the sensor.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
P0AEF
275
Open or short to GND in the front motor inverter temperature sensor circuit
  1. w/ converter inverter assembly (MG ECU)
P0AF0
274
+B short in front motor inverter temperature sensor circuit
  1. w/ converter inverter assembly (MG ECU)

INSPECTION PROCEDURE

CAUTION:
  1. Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
  2. After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT:
At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.

1.CHECK W/ CONVERTER INVERTER ASSEMBLY

CAUTION:
Be sure to wear insulated gloves.



    A103665E01

  1. Turn the ignition switch off and remove the service plug grip. (Click here)

    NOTICE:
    Do not put the vehicle into the READY-on state with the service plug grip removed as this may cause a malfunction.

  1. Remove the inverter cover. (Click here)

    NOTICE:
    1. Wrap the interlock round terminal for the inverter cover with vinyl tape to prevent it from shorting to ground.
    2. Be sure to prevent water in the reservoir tank from entering the inverter.
    3. Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.

  1. Check the connections of the MG ECU connectors.

    OK:
    Connectors are connected securely and there is no poor connection.



NG
CONNECT SECURELY
OK

REPLACE W/ CONVERTER INVERTER ASSEMBLY