DTC P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249: Drive Motor "A" Temperature Sensor Circuit High: Procedure

NG → CONNECT SECURELY 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Data List / Motor Temperature.
4. Read the Data List.

   Result

   Result	Proceed to
   -40°C (-40°F)	A
   215°C (419°F)	B
   Same as actual temperature	C

5. Turn the power switch off.

B → See step   5 

C → See step   10 

A: Go to next step 

1. Disconnect the motor temperature sensor connector.
   Fig 1: Identifying Motor Resolver Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals 4 (MMT) and 8 (MMTG) of vehicle side connector B6 of the motor temperature sensor.
   Fig 2: Identifying Motor Temperature Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Enter the following menus: Powertrain / EV / Data List / Motor Temperature
6. Read the Data List.

   OK

   Techstream Display	Switch Condition	Specified Condition
   Motor Temperature	Terminals MMT and MMTG connected. Power switch on (IG)	215°C (419°F)

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Motor Temperature Sensor)

   HINT: 

   The motor temperature sensor is not available separately. If it requires replacement, replace the EV transaxle with motor assembly.

7. Turn the power switch off.
8. Reconnect the motor temperature sensor connector.

NG → See step   4 

OK → See step   9 

1. Connect terminals 16 (MMT) and 17 (MMTG) of connector A23 of the power management control ECU.
   Fig 3: Identifying Power Management Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Enter the following menus: Powertrain / EV / Data List / Motor Temperature
5. Read the Data List.

   OK

   Techstream Display	Switch Condition	Specified Condition
   Motor Temperature	Terminals MMT and MMTG connected. Power switch on (IG)	215°C (419°F)

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

6. Turn the power switch off.

NG → See step   7 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the motor temperature sensor connector.
   Fig 4: Identifying Motor Resolver Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Enter the following menus: Powertrain / EV / Data List / Motor Temperature
5. Read the Data List.

   OK

   Techstream Display	Switch Condition	Specified Condition
   Motor Temperature	Power switch on (IG)	-40°C (-40°F)

   HINT: 

   The motor temperature sensor is not available separately. If it requires replacement, replace the EV transaxle with motor assembly.

6. Turn the power switch off.

NG → See step   6 

OK → See step   9 

1. Disconnect the motor temperature sensor connector.
2. Disconnect the power management control ECU connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 5: Measuring Resistance Of Power Management Control ECU - Motor Temperature Sensor Harness & Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   B6-4 (MMT) - A23-16 (MMT)	Power switch off	Below 1 Ω
   B6-8 (MMTG) - A23-17 (MMTG)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   B6-4 (MMT) or A23-16 (MMT) - Body ground and other terminals	Power switch off	10 kΩ or higher
   B6-8 (MMTG) or A23-17 (MMTG) - Body ground and other terminals	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Motor Temperature Sensor)
   *b	Rear view of wire harness connector (to Power Management Control ECU)

4. Reconnect the power management control ECU connector.
5. Reconnect the motor temperature sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Even though it has been determined that the power management control ECU needs to be replaced, make sure to inspect the voltage difference between No. 1 EV battery and No. 2 EV battery before replacing it.

NEXT → See step   8