Motor Resolver Circuit [10/2017 - 10/2020]: Procedure

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)

WARNING:

Be sure to wear insulated gloves.

Check that the service plug grip is not installed.
NOTE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.
Disconnect the A94 inverter with converter assembly connector.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

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

Standard Voltage

Tester Connection	Condition	Specified Condition
A94-12 (MRF) - Body ground	Power switch on (IG)	Below 1 V
A94-23 (MRFG) - Body ground	Power switch on (IG)	Below 1 V
A94-1 (MSN) - Body ground	Power switch on (IG)	Below 1 V
A94-2 (MSNG) - Body ground	Power switch on (IG)	Below 1 V
A94-4 (MCS) - Body ground	Power switch on (IG)	Below 1 V
A94-3 (MCSG) - Body ground	Power switch on (IG)	Below 1 V

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Inverter with Converter Assembly)

NOTE:

Turning the power switch on (IG) with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 2 minutes or more.

Reconnect the A94 inverter with converter assembly connector.

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 2

CHECK MOTOR RESOLVER

WARNING:

Be sure to wear insulated gloves.

Check that the service plug grip is not installed.
NOTE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.
Disconnect the A94 inverter with converter assembly connector.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
A94-12 (MRF) - A94-23 (MRFG)	Power switch off	9.1 to 15.2 Ω
A94-1 (MSN) - A94-2 (MSNG)	Power switch off	16.4 to 28.4 Ω
A94-4 (MCS) - A94-3 (MCSG)	Power switch off	18.4 to 30.4 Ω

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).)

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
A94-12 (MRF) or A94-23 (MRFG) - Body ground and other terminals	Power switch off	1 MΩ or higher
A94-1 (MSN) or A94-2 (MSNG) - Body ground and other terminals	Power switch off	1 MΩ or higher
A94-4 (MCS) or A94-3 (MCSG) - Body ground and other terminals	Power switch off	1 MΩ or higher

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Inverter with Converter Assembly)

Reconnect the A94 inverter with converter assembly connector.

Result

Proceed to
OK
NG

Result:

MOTOR RESOLVER CIRCUIT NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC)

Result:

See step 3

CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

Check the connection condition of the motor resolver 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 [10/2017 - ]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

- The connector is connected securely.

- The terminals are not deformed and are connected securely.

- No water or foreign matter in the connector.

Result

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:

CONNECT SECURELY

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 4

INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR RESOLVER)

Disconnect the D39 motor resolver connector.

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

*a	Component without harness connected (Motor Resolver (Hybrid Vehicle Transmission Assembly))

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
D39-1 (MRF) - D39-7 (MRFG)	Power switch off	8.8 to 14.8 Ω
D39-2 (MSN) - D39-6 (MSNG)	Power switch off	16.2 to 28.0 Ω
D39-3 (MCS) - D39-5 (MCSG)	Power switch off	18.1 to 30.0 Ω

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).)

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
D39-1 (MRF) - Body ground and other terminals (except D39-7 (MRFG))	Power switch off	1 MΩ or higher
D39-7 (MRFG) - Body ground and other terminals (except D39-1 (MRF))	Power switch off	1 MΩ or higher
D39-2 (MSN) - Body ground and other terminals (except D39-6 (MSNG))	Power switch off	1 MΩ or higher
D39-6 (MSNG) - Body ground and other terminals (except D39-2 (MSN))	Power switch off	1 MΩ or higher
D39-3 (MCS) - Body ground and other terminals (except D39-5 (MCSG))	Power switch off	1 MΩ or higher
D39-5 (MCSG) - Body ground and other terminals (except D39-3 (MCS))	Power switch off	1 MΩ or higher

Reconnect the D39 motor resolver connector.

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

for 2WD:

Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020]

for AWD:

Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020]