Inspection Procedure

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

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

NG: CONNECT SECURELY 

Fig 1: Identifying HV Control ECU Connectors

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OK: Go to next step 

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

   Result 

   DTC RESULT DESCRIPTION
   
   

   Tester Connection	Voltage	Proceed to
   MMT (H32-26) - MMTG (H32-33)	Approximately 0 or 5 V	A
   	9 to 14V	B

A: GO TO step   5 

Fig 2: Identifying Hybrid Vehicle Control ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: Go to next step 

1. Disconnect the H32 connector from the HV control ECU.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value (s) in the table below.

   Result: 

   DTCS RESULT DESCRIPTION
   
   

   Tester Connection	Voltage	Proceed to
   MMT (H32-26) - MMTG (H32-33)	Approximately 0 V	A
   	9 to 14V	B

   NOTE: 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.

Fig 3: Disconnecting H32 Connector From HV Control ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE HYBRID VEHICLE CONTROL ECU 

B: Go to next step 

1. Disconnect the H32 connector from the HV control ECU.
2. Disconnect the M15 motor temperature sensor connector.
3. Turn the ignition switch to the ON position.
4. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   MMT (M15-1) or MMT (H32-26) - Body ground	Approximately 0 V

   NOTE: 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.

Fig 4: Disconnecting H32 Connector From HV Control ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

1. Disconnect the H32 connector from the HV control ECU.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Resistance	Temperature
   MMT (H32-26) - MMTG (H32-33)	142.6 k to 184.1 kΩ	0°C (32°F)
   	44.2 k to 54.4 kΩ	25°C (77°F)
   	16.2 k to 19.1 kΩ	50°C (122°F)
   	3.3 k to 3.5 kΩ	100°C (212°F)

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

   Standard Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   MMT (H32-26) or MMTG (H32-33) - Body ground	10 kΩ or higher

Fig 5: Disconnecting H32 Connector From HV Control ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE HYBRID VEHICLE CONTROL ECU 

NG: Go to next step 

1. Disconnect the H32 connector from the HV control ECU.
2. Disconnect the M15 motor temperature sensor connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   MMT (H32-26) - MMT (M15-1)	Below 1 Ω
   MMTG (H32-33) - MMTG (M15-3)	Below 1 Ω

   Standard Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   MMT (H32-26) or MMTG (H32-33) - 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 

Fig 6: Checking Harness And Connector (HV Control ECU - Motor Temperature Sensor)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY