DTC P0A38-257: Generator Temperature Sensor Circuit Low; DTC P0A39-259: Generator Temperature Sensor Circuit High [10/2017 - ]: Procedure

Refer to PROCEDURE - Step 1 .

OK

- The connector is connected securely.

- The terminals are not deformed and are connected securely.

- No water or foreign matter in the connector.

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

Go to next step 

1. Check the connection condition of the generator temperature sensor connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [02/2014 - ] .

   OK

   - The connector is connected securely.

   - The terminals are not deformed and are connected securely.

   - No water or foreign matter in the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result	Proceed to
   OK	A
   NG (The connector is not connected securely.)	B
   NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)	C

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

   Powertrain > Hybrid Control > Data List 

   Tester Display
   Motor Temp No2

4. Read the Data List.

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

5. Turn the power switch off.

Result: 

215°C (419°F) 

See step  6

Result: 

Same as actual temperature 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

-40°C (-40°F) 

Go to next step 

1. Disconnect the C82 generator temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Generator Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (GMT) - 8 (GMTG)	Power switch OFF	0.3436 to 1442 kΩ

   HINT: 

   The generator temperature sensor is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

3. Reconnect the C82 generator temperature sensor connector.

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY.  Refer to COMPONENTS [11/2016 - ] .

Result: 

OK 

Go to next step 

1. Connect terminals 26 (GMT) and 27 (GMTG) of the A85 hybrid vehicle control ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (to Hybrid Vehicle Control ECU Assembly)

2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

   Powertrain > Hybrid Control > Data List 

   Tester Display
   Motor Temp No2

5. Read the Data List.

   OK

   Tester Display	Condition	Specified Condition
   Motor Temp No2	Terminals GMT and GMTG connected Power switch on (IG)	215°C (419°F)

6. Turn the power switch off.

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY.  Refer to COMPONENTS [11/2016 - ] .

1. Disconnect the C82 generator temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Generator Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (GMT) - 8 (GMTG)	Power switch OFF	0.3436 to 1442 kΩ

   HINT: 

   The generator temperature sensor is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

3. Reconnect the C82 generator temperature sensor connector.

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY.  Refer to COMPONENTS [11/2016 - ] .

Result: 

OK 

Go to next step 

1. Disconnect the C82 generator temperature sensor connector.
2. Disconnect the A85 hybrid vehicle control ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Generator Temperature Sensor)
   *b	Rear view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   C82-4 (GMT) - A85-26 (GMT)	Power switch off	Below 1 Ω
   C82-8 (GMTG) - A85-27 (GMTG)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   C82-4 (GMT) or A85-26 (GMT) - Body ground and other terminals	Power switch off	10 kΩ or higher
   C82-8 (GMTG) or A85-27 (GMTG) - Body ground and other terminals	Power switch off	10 kΩ or higher

4. Turn the power switch off.
5. Reconnect the A85 hybrid vehicle control ECU assembly connector.
6. Reconnect the C82 generator temperature sensor connector.

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY.  Refer to COMPONENTS [11/2016 - ] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR