DTC    P0A2C-247    Drive Motor "A" Temperature Sensor Circuit Low

DTC    P0A2D-249    Drive Motor "A" Temperature Sensor Circuit High

for Preparation Click here


DESCRIPTION

The resistance of the thermistor built into the motor temperature sensor changes in accordance with changes in Motor temperature. The lower the Motor temperature, the higher the termistor resistance. Conversely, the higher the temperature, the lower the resistance.

A037296E01


DTC No.
INF Code
DTC Detection Condition
Trouble Area
P0A2C
247
GND short in motor temperature sensor circuit
  1. Wire harness or connector
  2. HV control ECU
  3. Hybrid vehicle transaxle assembly (Motor temperature sensor)
P0A2D
249
Open or +B short in motor temperature sensor circuit
  1. Wire harness or connector
  2. HV control ECU
  3. Hybrid vehicle transaxle assembly (Motor temperature sensor)

HINT:
After confirming that DTC P0A2C-247 or P0A2D-249 is output, use the intelligent tester to check "MOTOR 2 TEMP" in the HV system ECU data list.

Displayed Temperature
Malfunction
-50°C
Open or +B short circuit
205°C
GND short


WIRING DIAGRAM


A113954E04


INSPECTION PROCEDURE

1.CHECK CONNECTION CONDITION OF HYBRID VEHICLE CONTROL ECU CONNECTOR (LOOSENESS AND POOR CONTACT)


    A103658E18

  1. Check the connections of all HV control ECU connectors.

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



NG
CONNECT SECURELY
OK


2.INSPECT HYBRID VEHICLE CONTROL ECU


    A103658E40

  1. Turn the ignition switch to the ON position. Measure the voltage according to the value(s) in the table below.

    Result:
    Tester Connection
    		Voltage
    		Proceed to
    MMT (H34-26) - MMTG (H34-33)
    		Approximately 0 or 5 V
    		A
    9 to 14V
    		B



A
Go to step 5
B


3.CHECK HARNESS AND CONNECTOR (+B SHORT)


    A103659E03

  1. Disconnect the H34 connector from the HV control ECU.

  1. Turn the ignition switch to the ON position.

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

    Result::
    Tester Connection
    		Voltage
    		Proceed to
    MMT (H34-26) - MMTG (H34-33)
    		Approximately 0 V
    		A
    9 to 14V
    		B

    NOTICE:
    Turning the ignition switch to the ON position with the HV control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.



A
REPLACE HYBRID VEHICLE CONTROL ECU
B


4.CHECK HARNESS AND CONNECTOR (+B SHORT)

  1. Disconnect the H34 connector from the HV control ECU.

  1. Disconnect the M8 motor temperature sensor connector.

  1. Turn the ignition switch to the ON position.



    A105210E05

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

    Standard Voltage:
    Tester Connection
    		Specified Condition
    MMT (M8-1) or MMT (H34-26) - Body ground
    		Approximately 0 V

    NOTICE:
    Turning the ignition switch to the ON position with the HV control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.

    HINT:
    The motor temperature sensor is not available as a single product. If it requires replacement, replace the HV transaxle assembly.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

5.INSPECT MOTOR TEMPERATURE SENSOR


    A103659E03

  1. Disconnect the H34 connector from the HV control ECU.

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

    Standard Resistance:
    Tester Connection
    		Resistance
    		Temperature
    MMT (H34-26) - MMTG (H34-33)
    		142.6 k to 184.1 kΩ
    		0°C
    44.2 k to 54.4 kΩ
    		25°C
    16.2 k to 19.1 kΩ
    		50°C
    3.3 k to 3.5 kΩ
    		100°C

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

    Standard Resistance:
    Tester Connection
    		Specified Condition
    MMT (H34-26) or MMTG (H34-33) - Body ground
    		10 kΩ or higher



OK
REPLACE HYBRID VEHICLE CONTROL ECU
NG


6.CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - MOTOR TEMPERATURE SENSOR)

  1. Disconnect the H34 connector from the HV control ECU.

  1. Disconnect the M8 motor temperature sensor connector.



    A105210E06

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

    Standard Resistance:
    Tester Connection
    		Specified Condition
    MMT (H34-26) - MMT (M8-1)
    		Below 1 Ω
    MMTG (H34-33) - MMTG (M8-3)
    		Below 1 Ω

    Standard Resistance:
    Tester Connection
    		Specified Condition
    MMT (H34-26) or MMTG (H34-33) - Body ground
    		10 kΩ or higher

    HINT:
    The motor temperature sensor is not available as a single product. If it requires replacement, replace the HV transaxle assembly.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY