Motor High-voltage Circuit [12/2019 - 11/2023]: Procedure

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter cover from the inverter with converter assembly.
3. Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.

   Specified Condition

   T = 8.0 N*m (82 kgf*cm, 71 in.*lbf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Disconnect the motor cable from the inverter with converter assembly.
5. Check for arc marks at the terminals for the motor cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

6. Reconnect the motor cable.
7. Reinstall the inverter cover.

Result: 

B 

REPLACE MALFUNCTIONING PARTS 

Result: 

C 

CONNECT SECURELY 

Result: 

A 

See step  2

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter cover from the inverter with converter assembly.
3. Disconnect the motor cable from the inverter with converter assembly.
4. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Shield Ground
   *a	Motor Cable (Inverter with Converter Assembly Side)

   HINT: 

   If the motor (MG2) temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   w2-1 (W) - w2-2 (U)	Ignition switch off	30.2 to 33.4 mΩ
   w2-2 (U) - w2-3 (V)	Ignition switch off	30.2 to 33.4 mΩ
   w2-3 (V) - w2-1 (W)	Ignition switch off	30.3 to 33.5 mΩ

   HINT: 

   To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

   R20 = Rt / {1 + 0.00393 X (T - 20)}

   The calculation is based on the following:

   R20: Resistance at 20°C (68°F) (mΩ)

   Rt: Measured resistance (mΩ)

   T: Temperature when the resistance is measured (°C (°F).)

5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   NOTE:

   Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   w2-1 (W) - Body ground and shield ground	Ignition switch off	100 MΩ or higher
   w2-2 (U) - Body ground and shield ground	Ignition switch off	100 MΩ or higher
   w2-3 (V) - Body ground and shield ground	Ignition switch off	100 MΩ or higher

6. Reconnect the motor cable.
7. Reinstall the inverter cover.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

MOTOR HIGH-VOLTAGE CIRCUIT NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC) 

Result: 

NG 

See step  3

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter with converter assembly.
3. Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.

   Specified Condition

   T=10 N*m (102 kgf*cm, 7 ft.*lbf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Disconnect the motor cable from the hybrid vehicle transaxle assembly.
5. Check for arc marks at the terminals for the generator cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

6. Reconnect the motor cable.
7. Reinstall the inverter with converter assembly.

Result: 

B 

REPLACE MALFUNCTIONING PARTS 

Result: 

C 

CONNECT SECURELY 

Result: 

A 

See step  4

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the inverter with converter assembly.
3. Remove the motor cable.
4. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   NOTE:

   Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Shielded Ground	-	-
   *a	Motor Cable	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   w2-1 (W) or w1-1 (W) - Shield ground	Ignition switch off	100 MΩ or higher
   w2-2 (U) or w1-2 (U) - Shield ground	Ignition switch off	100 MΩ or higher
   w2-3 (V) or w1-3 (V) - Shield ground	Ignition switch off	100 MΩ or higher

   NOTE:

   Wrap the terminals of the motor cable with insulating tape to prevent them from coming into contact with body ground.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   w2-1 (W) - w1-1 (W)	Ignition switch off	Below 1 Ω
   w2-2 (U) - w1-2 (U)	Ignition switch off	Below 1 Ω
   w2-3 (V) - w1-3 (V)	Ignition switch off	Below 1 Ω
   w2-1 (W) - w1-2 (U)	Ignition switch off	100 MΩ or higher
   w2-2 (U) - w1-3 (V)	Ignition switch off	100 MΩ or higher
   w2-3 (V) - w1-1 (W)	Ignition switch off	100 MΩ or higher

6. Reinstall the motor cable.
7. Reinstall the inverter with converter assembly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

Result: 

NG 

REPLACE MOTOR CABLE 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]