P0A38

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A38-257,P0A39-259: Generator Temperature Sensor Circuit Low
P0A39-259 - Generator Temperature Sensor Circuit High

DESCRIPTION

The resistance of the thermistor built into the generator temperature sensor changes in accordance with changes in MG1 temperature. The lower the MG1 temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance.





HINT
After confirming that DTC P0A38-257 or P0A39-259 is output, use the Techstream to check "Motor Temp No2" in the hybrid vehicle control ECU Data List.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0343

NG -- CONNECT SECURELY
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (MOTOR TEMP NO2)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

(d) Read the Data List.

Result:





(e) Turn the power switch off.

C -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems

B -- READ VALUE USING TECHSTREAM (CHECK FOR SHORT)
A -- Continue to next step.

3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN)

(a) Disconnect connector C23 from the generator temperature sensor.





(b) Connect terminals 4 (GMT) and 9 (GMTG) of connector C23 of the generator temperature sensor.





(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (IG).

(e) Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

(f) Read the Data List.

OK:





Text in Illustration





HINT
The generator temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.

(g) Turn the power switch off.

(h) Connect the generator temperature sensor connector.

NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - GENERATOR TEMPERATURE SENSOR)

OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components

4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - GENERATOR TEMPERATURE SENSOR)

(a) Disconnect connector C23 from the generator temperature sensor.

(b) Disconnect connector A58 from the hybrid vehicle control ECU.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the hybrid vehicle control ECU connector.

(e) Connect the generator temperature sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components

5. READ VALUE USING TECHSTREAM (CHECK FOR SHORT)

(a) Disconnect connector C23 from the generator temperature sensor.





(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

(e) Read the Data List.

OK:





HINT
The generator temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.

(f) Turn the power switch off.

NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - GENERATOR TEMPERATURE SENSOR)

OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components

6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - GENERATOR TEMPERATURE SENSOR)

(a) Disconnect connector C23 from the generator temperature sensor.

(b) Disconnect connector A58 from the hybrid vehicle control ECU.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the hybrid vehicle control ECU connector.

(e) Connect the generator temperature sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components