P0A2D

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A2C-247: Drive Motor "A" Temperature Sensor Circuit Low

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

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

DESCRIPTION

The resistance of the thermistor built into the motor temperature sensor changes in accordance with changes in MG2 temperature. The lower the MG2 temperature, the more the thermistor resistance. Conversely, the more the temperature, the lower the resistance.

HINT: After confirming that DTC P0A2C-247 or P0A2D-249 is output, use the Techstream to check "Motor Temp No. 2" in the HV ECU data list.

WIRING DIAGRAM

INSPECTION PROCEDURE
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 disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (HV CONTROL ECU CONNECTOR)

(a) Check the connections of all hybrid vehicle control ECU connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (MOTOR2 TEMP)
(a) Turn the power switch on (IG).
(b) Select the following menu items: Powertrain / Hybrid Control / Data List / Motor Temp No2.
(c) Read the data list.
Result:

C -- CHECK FOR INTERMITTENT PROBLEMS
B -- READ VALUE USING TECHSTREAM (MOTOR2 TEMP)
A -- Continue to next step.
3. READ VALUE USING TECHSTREAM (MOTOR2 TEMP)

(a) Disconnect the motor temperature sensor connector.
(b) Connect terminals 4 and 8 of the motor temperature sensor vehicle side connector.
(c) Turn the power switch on (IG).
(d) Select the following menu items: Powertrain / Hybrid Control / Data List / Motor Temp No2.
(e) Read the data list.
Displayed temperature:
205°C (401°F) or more
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
NG -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - MOTOR TEMPERATURE SENSOR)

(a) Connect terminals from the hybrid vehicle control ECU connector.
(b) Turn the power switch on (IG).
(c) Select the following menu items: DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST / MOTOR1 TEMP.
(d) Read the data list.
Displayed temperature:
205°C (401°F) or more
NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
5. READ VALUE USING TECHSTREAM (MOTOR2 TEMP)
(a) Disconnect the motor temperature sensor connector.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Data List / Motor Temp No2.
(d) Read the data list.
Displayed temperature:
-50°C (-58°F)
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
NG -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - MOTOR TEMPERATURE SENSOR)
(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Disconnect the motor temperature sensor connector.

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU