Nissan Ariya: Front Traction Motor

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Electric Power Train / Traction Motor System / Front Traction Motor

Preparation
Description
Basic Inspection
Ecu Diagnosis Information. Inverter (front)
Dtc Diagnosis
Component Parts /circuit Diagnosis
Symptom Diagnosis. Electromagnetic Noise Is Audible
Periodic Maintenance. Front Traction Motor Oil
Removal and Installation. Inverter (front)

Ecu Diagnosis Information. Inverter (front) Nissan Ariya

Physical Values

TERMINAL LAYOUT

PHYSICAL VALUES

CAUTION:

Disconnect the inverter (front) connector and measure it using wiring harness connector on the Nissan Ariya vehicle side. While doing so, do not touch the connector terminals on the inverter (front).

If the power switch is switched ON when the inverter (front) connector is disconnected, the other control modules may detect that there is an error with the inverter (front).

Terminal No. (Wire Color)		Item		Condition	Value (Approx.)
+	−	Signal name	Input/Output	Condition	Value (Approx.)
1 (BR)	11 (GR)	Motor oil temperature sensor	Input	—	Within ±50% of the temperature characteristics chart
3 (BG)	2 (V)	Motor temperature sensor	Input	—	Within ±50% of the temperature characteristics chart
4 (B)	Ground	Ground 2	—	Always	0 V
13 (R)	12 (L)	Motor resolver signal (S1 - S3)	Input	—	34.6 - 42.4 Ω
14 (B)	Ground	Ground 1	—	Always	0 V
18 (SB)	Ground	12V battery power supply	Input	Always	9 – 16 V
22 (Y)	21 (W)	Motor resolver signal (S2 - S4)	Input	—	37.6 - 46.0 Ω
24 (G)	23 (BR)	Motor resolver signal (R1 - R2)	Output	—	8.5 - 12.7 Ω
25^* (R)	—	—	—	—	—
26 (G)	Ground	EV system CAN-L	Input/Output	—	—
27 (L)	Ground	EV system CAN-H	Input/Output	—	—
28 (P)	Ground	12V battery power supply	Input	Always	9 – 16 V
29 (Y)	19 (W)	Motor oil pump communication signal	Input/Output	—	—
30 (LG)	Ground	Power switch ON signal	Input	Power switch: ON	9 – 16 V
30 (LG)	Ground	Power switch ON signal	Input	Power switch: OFF	0 V

*: Not used for control.

Values On The Diagnosis Tool

NOTE:

The following table includes information (items) inapplicable to this Nissan Ariya vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

Monitor item	Condition	Value/Status
Motor speed 1	READY state (Nissan Ariya vehicle is stopped)	Approx. 0 rpm
Motor speed 1	During driving	The value changes depending on the Nissan Ariya vehicle speed.
Inverter input voltage (High voltage)	READY (stop the Nissan Ariya vehicle) and during driving	Approximately the same as the Li-ion battery voltage
Rotor current value 1	READY state (Nissan Ariya vehicle is stopped)	Approx. 0 rpm
Rotor current value 1	During driving	0 - 17.5 A (The value changes depending on the Nissan Ariya vehicle speed.)
Rotor current value 2	READY state (Nissan Ariya vehicle is stopped)	Approx. 0 rpm
Rotor current value 2	During driving	0 - 17.5 A (The value changes depending on the Nissan Ariya vehicle speed.)
Ignition signal	Power switch ON	Ignition power supply on
Inverter power module temperature	READY state (Nissan Ariya vehicle is stopped)	Same as the cooling water temperature once the temperature is saturated
Inverter power module temperature	During driving	The temperature changes depending on the Nissan Ariya vehicle running
Resolver offset value	―	―
Rotor resistance value	―	―
Inverter initial diagnosis	READY state (Nissan Ariya vehicle is stopped)	Not diagnosed
Inverter high voltage circuit diagnosis result	READY state	OK
Inverter torque control function diagnosis result	READY state	OK
Inverter abnormality judgement 1	READY state	OK
Inverter abnormality judgement 2	READY state	OK
Rotor current diagnosis result	READY state	OK
Stator current diagnosis result	READY state	OK
Inverter over voltage malfunction (High voltage)	READY state	OK
Inverter control status 1	READY state (Nissan Ariya vehicle is stopped)	Traction
Inverter control status 1	During driving	Traction
12V battery voltage	Power switch ON	9 – 16 V
Re-programming judgement result	―	―
Key available	―	―
Inverter temperature	READY state	The temperature changes depending on the Nissan Ariya vehicle running (including when stopped).
Inverter power module high arm IGBT status	READY state	OK
Inverter power module low arm IGBT status	READY state	OK
Li-ion battery abnormality state	READY state	OK
Li-ion battery voltage	Power switch ON	269 – 402 V
Discharge request	READY state	Off
Torque request	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 Nm
Torque request	During driving	Changes depending on the Nissan Ariya vehicle acceleration or deceleration
Inverter activation request	Power switch ON	Off
Inverter activation request	READY state	On
Sleep/wake up request	Power switch ON	Wake up request
Ignition signal (CAN)	Power switch ON	Ignition power on
Communication diagnosis permission status	READY state	Permit
Coolant flow	READY state	Changes depending on the Nissan Ariya vehicle state.
ODO	Power switch ON	Approximately the same as the combination meter ODO
Safety maximum torque	During driving	Changes depending on the Nissan Ariya vehicle acceleration or deceleration
High voltage relay status	Power switch ON	Close
OTA status	Power switch ON (no OTA request)	No request
Drive prohibition signal	Power switch ON	OK
Safety minimum torque	During driving	Changes depending on the Nissan Ariya vehicle acceleration or deceleration
Oil pump status	Power switch ON	OK
Stator temperature	READY state (Nissan Ariya vehicle is stopped)	Same as the cooling water temperature once the temperature is saturated
Stator temperature	During driving	The temperature changes depending on the Nissan Ariya vehicle running
Rotor temperature	READY state (Nissan Ariya vehicle is stopped)	It is an estimated value and declines gradually when Nissan Ariya vehicle is stopped.
Rotor temperature	During driving	The temperature changes depending on the Nissan Ariya vehicle running
Command oil pump speed	READY state (Nissan Ariya vehicle is stopped)	500 - 3800 rpm (Changes depending on the front traction motor temperature and oil temperature.)
Oil pump speed	READY state (Nissan Ariya vehicle is stopped)	500 - 3800 rpm (Changes depending on the front traction motor temperature and oil temperature.)
Motor speed 2	READY state (Nissan Ariya vehicle is stopped)	Approx. 0 rpm
Motor speed 2	During driving	The value changes depending on the Nissan Ariya vehicle speed.
Inverter high voltage	READY (stop the Nissan Ariya vehicle) and during driving	Approximately the same as the Li-ion battery voltage
Motor oil temperature	READY state (Nissan Ariya vehicle is stopped)	Same as the cooling water temperature once the temperature is saturated
Motor oil temperature	During driving	The temperature changes depending on the Nissan Ariya vehicle running
Inverter direct current value	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 A
Inverter direct current value	During driving	The temperature changes depending on the Nissan Ariya vehicle running
Motor maximum power	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 kw
Motor maximum power	During driving	The value changes depending on the Nissan Ariya vehicle speed.
Motor power/regeneration status	READY state (Nissan Ariya vehicle is stopped)	Power mode
	During driving (accelerator pedal ON)	Power mode
	During driving (accelerator pedal OFF)	Regeneration mode
Inverter discharge status	Inverter (front) discharging	Discharging
Inverter discharge status	Except above	Not discharged
Inverter control status 2	READY state	OK
Motor estimated torque	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 Nm
Motor estimated torque	During driving (accelerator pedal ON)	Changes depending on the Nissan Ariya vehicle speed.
Motor regeneration maximum torque	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 Nm
Motor regeneration maximum torque	During driving (accelerator pedal OFF)	Changes depending on the Nissan Ariya vehicle speed.
Motor power maximum torque	READY state (Nissan Ariya vehicle is stopped)	Approx. 0.0 Nm
Motor power maximum torque	During driving (accelerator pedal ON)	Changes depending on the Nissan Ariya vehicle speed.
Inverter sleep permission	Power switch ON	Prohibit
Motor normalization temperature	Power switch ON	0 - 100% (Changes depending on the front traction motor temperature.)
Inverter abnormality state	Power switch ON	OK
Inverter status (CAN)	READY state (Nissan Ariya vehicle is stopped)	Power on 2
Inverter normalization temperature	Power switch ON	0 - 100% [Changes depending on the inverter (front) temperature.]
Lamp lighting request 2	EV system warning (EV system stopped)When displayed	Request present
Lamp lighting request 2	Except above	No request
Lamp lighting request 1	EV system warning (EV system malfunction)When displayed	Request present
Lamp lighting request 1	Except above	No request
Inverter coolant temperature	READY state (Nissan Ariya vehicle is stopped)	Same as the cooling water temperature once the temperature is saturated
Inverter coolant temperature	During driving	The temperature changes depending on the Nissan Ariya vehicle running
U current sensor offset value	―	―
V current sensor offset value	―	―
W current sensor offset value	―	―
Rotor current sensor 1 offset value	―	―
Rotor current sensor 2 offset value	―	―

Fail-safe

Refer to Fail-safe.

Protection Function

Refer to Protection Function.

DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the priority as per the following list. For DTC, Refer to DTC Index.

Priority	Detected items (DTC)
1	P0A8B-A2 14 Volt Power Module System Voltage
2	P030A-62 Ignition A Control Signal
	P0A2A-11 Drive Motor A Temperature Sensor
	P0A2A-13 Drive Motor A Temperature Sensor
	P0A2A-4B Drive Motor A Temperature Sensor
	P0CBC-11 Drive Motor A Coolant Temperature Sensor
	P0CBC-13 Drive Motor A Coolant Temperature Sensor
	P0CBC-4B Drive Motor A Coolant Temperature Sensor
	P0CC1-04 Drive Motor A Coolant Pump Control
	P0CC1-81 Drive Motor A Coolant Pump Control
	P0CC1-87 Drive Motor A Coolant Pump Control
	P0D2D-17 Drive Motor A Inverter Voltage Sensor A
	P0DA8-00 Hybrid/EV Battery Voltage/Drive Motor A Inverter Voltage Correlation
	P161D-61 Immobilizer
	P161E-68 Immobilizer
	P161F-64 Immobilizer
	P0A78-48 Drive Motor A Inverter
	P0A78-62 Drive Motor A Inverter
	U2143-82 CAN communication error (VCM/HCM)
	U2143-83 CAN communication error (VCM/HCM)
	U2143-87 CAN communication error (VCM/HCM)
	U2144-82 CAN communication error (Li-ion battery)
	U2144-83 CAN communication error (Li-ion battery)
	U2144-87 CAN communication error (Li-ion battery)
	U2150-87 CAN communication error (AIRBAG)
3	P0A00-11 Motor Electronics Coolant Temperature Sensor A
	P0A00-13 Motor Electronics Coolant Temperature Sensor A
	P0A1B-01 Drive Motor A Control Module
	P0A1B-03 Drive Motor A Control Module
	P0A1B-04 Drive Motor A Control Module
	P0A1B-05 Drive Motor A Control Module
	P0A1B-44 Drive Motor A Control Module
	P0A3F-04 Drive Motor A Position Sensor
	P0A3F-1C Drive Motor A Position Sensor
	P0A51-01 Drive Motor A Current Sensor
	P0AED-11 Drive Motor Inverter Temperature Sensor A
	P0AED-13 Drive Motor Inverter Temperature Sensor A
	P0AED-1C Drive Motor Inverter Temperature Sensor A
	P0AED-4B Drive Motor Inverter Temperature Sensor A
	P0BE5-1C Drive Motor A Phase U Current Sensor
	P0BE9-1C Drive Motor A Phase V Current Sensor
	P0BED-1C Drive Motor A Phase W Current Sensor
	P0BFF-11 Drive Motor A Current
	P0BFF-12 Drive Motor A Current
	P0C0B-01 Drive Motor A Inverter Power Supply
	P0C0B-04 Drive Motor A Inverter Power Supply
	P0C0B-1C Drive Motor A Inverter Power Supply
	P0C0B-A2 Drive Motor A Inverter Power Supply
	P2E28-01 Drive Motor A Excitation Current Sensor
	P2E28-18 Drive Motor A Excitation Current Sensor
	P2E28-1D Drive Motor A Excitation Current Sensor
	P2E2B-11 Drive Motor A Excitation Current
	P2E2B-12 Drive Motor A Excitation Current
	P2E2B-1C Drive Motor A Excitation Current
	P3081-44 Resolver Offset Value Error
	P3082-44 Rotor Resistance Value Error
	P3083-44 Immobilizer
4	P0BFF-18 Drive Motor A Current
4	P2D3B-92 Hybrid/EV Discharge System

DTC Index

NOTE:

If some DTCs are displayed at the same time, perform inspections one by one based on the priority as per the following list. Refer to DTC Inspection Priority Chart.

DTC^*1		Items (CONSULT screen terms)	EV system warning lamp	Reference
P030A	62	Ignition A Control Signal	—	DTC Description
P0A00	11	Motor Electronics Coolant Temperature Sensor A	—	DTC Description
P0A00	13	Motor Electronics Coolant Temperature Sensor A	—	DTC Description
P0A1B	01	Drive Motor A Control Module	ON	DTC Description
	03		ON	DTC Description
	04		ON	DTC Description
	05		ON	DTC Description
	44		—	DTC Description
P0A2A	11	Drive Motor A Temperature Sensor	ON	DTC Description
	13		ON	DTC Description
	4B		ON	DTC Description
P0A3F	04	Drive Motor A Position Sensor	ON	DTC Description
P0A3F	1C	Drive Motor A Position Sensor	ON	DTC Description
P0A51	01	Drive Motor A Current Sensor	ON	DTC Description
P0A78	48	Drive Motor A Inverter	ON	DTC Description
P0A78	62	Drive Motor A Inverter	ON	DTC Description
P0A8B	A2	14 Volt Power Module System Voltage	ON	DTC Description
P0AED	11	Drive Motor Inverter Temperature Sensor A	—	DTC Description
	13		—	DTC Description
	1C		—	DTC Description
	4B		ON	DTC Description
P0BE5	1C	Drive Motor A Phase U Current Sensor	ON	DTC Description
P0BE9	1C	Drive Motor A Phase V Current Sensor	ON	DTC Description
P0BED	1C	Drive Motor A Phase W Current Sensor	ON	DTC Description
P0BFF	11	Drive Motor A Current	ON	DTC Description
	12		ON	DTC Description
	18		ON	DTC Description
P0C0B	01	Drive Motor A Inverter Power Supply	ON	DTC Description
	04		ON	DTC Description
	1C		ON	DTC Description
	A2		ON	DTC Description
P0CBC	11	Drive Motor A Coolant Temperature Sensor	ON	DTC Description
	13		ON	DTC Description
	4B		ON	DTC Description
P0CC1	04	Drive Motor A Coolant Pump Control	ON	DTC Description
	81		ON	DTC Description
	87		ON	DTC Description
P0D2D	17	Drive Motor A Inverter Voltage Sensor A	ON	DTC Description
P0DA8	00	Hybrid/EV Battery Voltage/Drive Motor A Inverter Voltage Correlation	ON	DTC Description
P161D^*2	61	Immobilizer	—	—
P161E^*2	68	Immobilizer	—	—
P161F^*2	64	Immobilizer	—	—
P2D3B	92	Hybrid/EV Discharge System	ON	DTC Description
P2E28	01	Drive Motor A Excitation Current Sensor	ON	DTC Description
	18		ON	DTC Description
	1D		ON	DTC Description
P2E2B	11	Drive Motor A Excitation Current	ON	DTC Description
	12		ON	DTC Description
	1C		ON	DTC Description
P3081	44	Resolver Offset Value Error	ON	DTC Description
P3082	44	Rotor Resistance Value Error	ON	DTC Description
P3083	44	Immobilizer	—	DTC Description
U2143	82	CAN communication error (VCM/HCM)	May turn ON	DTC Description
	83		May turn ON	DTC Description
	87		May turn ON	DTC Description
U2144	82	CAN communication error (Li-ion battery)	May turn ON	DTC Description
	83		May turn ON	DTC Description
	87		May turn ON	DTC Description
U2150	87	CAN communication error (AIRBAG)	—	DTC Description

*1: These numbers are rescribed by SAE J2012/ISO 15031-6.

*2: These DTCs are the immobilizer-related DTCs.

Symptom Diagnosis. Electromagnetic Noise Is Audible Nissan Ariya

Symptom Description

The electromagnetic noise of the front traction motor may become more noticeable when accelerating on a steep slope (large output torque).

This occurs when the IGBT switching frequency is lowered by the inverter (front) due to high temperature of the IGBT inside the inverter (front). This does not indicate a problem with the inverter (front) characteristics or control.

This phenomenon is one of the protective controls. Refer to Protection Function.

Periodic Maintenance. Front Traction Motor Oil Nissan Ariya 2023

FRONT TRACTION MOTOR OIL : Inspection

Oil Leakage Inspection

Check that there is no oil leakage around the front traction motor.
If an abnormality is found, replace the front traction motor. Refer to FRONT TRACTION MOTOR : Removal & Installation.

Removal and Installation. Inverter (front) Nissan Ariya first Gen

INVERTER (FRONT) : Exploded View

INVERTER (FRONT) AND FRONT TRACTION MOTOR

Bracket	Clip	Air breather hose
Front traction motor stator temperature sensor joint connector	3-phase bus bar cover	Gasket
Breather	Excitation cover	Gasket
Gasket	Plug	Resolver harness
O-ring	Reduction gear	Front traction motor
Seal	Seal	Inverter (front)
High voltage harness	High voltage harness	Gasket
High voltage harness cover	O-ring
: Always replace after every disassembly.
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
: Apply lithium-based grease including molybdenum disulphide.
: Apply Genuine NISSAN Matic S ATF or equivalent.

FRONT TRACTION MOTOR MOUNTING

Motor mounting rear	Motor mounting bracket rear	Inverter (front)
Bracket	Motor mounting RH	Front traction motor
Motor mounting LH	Reduction gear
: N·m (kg-m, ft-lb)

INVERTER (FRONT) : Removal & Installation

DANGER:

Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

Refer to HIGH VOLTAGE PRECAUTIONS : Precautions.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

Never remove plug and gasket of front traction motor. If they are removed by mistake, replace the gasket with a new one and install them.

REMOVAL

WARNING:

Follow the instructions below before starting the procedure.

Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

Check the voltage in the high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

Remove inverter (front), front traction motor and reduction gear from vehicle together as suspension member assembly. Refer to FRONT SUSPENSION MEMBER : Removal & Installation.

Remove the electric compressor, low-pressure flexible hose, and high-pressure flexible hose together. Refer to Removal & Installation.

Remove high voltage harness terminal mounting bolts ( ).

WARNING:

To prevent electric shock hazards, be sure to put on insulating protective gear before beginning work on the high voltage system.

Remove high voltage harness mounting bolts (), and then disconnect high voltage harness .

WARNING:

To prevent electric shock hazards, be sure to put on insulating protective gear before beginning work on the high voltage system.

CAUTION:

Cover the opening and with tape to prevent dust, dirt, foreign material, etc. from entering the inverter (front) after removing the high voltage harness mounting bolt.

Remove harness bracket mounting bolt (), and then remove water hose and harness bracket .

Remove the water hose .

Remove the bracket mounting bolts ()and remove the breather hose and bracket .

CAUTION:

If the air breather hose was pulled out, do not reuse the air breather hose.

Attach sling belts to the inverter (front), front traction motor, and reduction gear, and prepare to separate them from the front suspension member assembly.

CAUTION:

When attaching the sling belts, avoid locations of connectors and other parts that are easily damaged.

Remove joint bolt () of motor mounting bracket rear and motor mounting rear.

Remove joint bolt () of motor mounting bracket LH and motor mounting LH.

Remove joint bolt () of motor mounting bracket RH and motor mounting RH.

Remove the water hose from electric water pump for Li-ion battery, and then remove the electric water pump. Refer to ELECTRIC WATER PUMP : Removal & Installation.

Remove the water hose from electric water pump, and then remove the electric water pump. Refer to ELECTRIC WATER PUMP : Removal & Installation.

Use a hoist to lift up the inverter (front), front traction motor, and reduction gear, and separate them from the front suspension member assembly.

CAUTION:

Lift slowly and be careful that the inverter (front), front traction motor, and reduction gear do not fall.

WARNING:

To prevent electric shock hazards, be sure to put on insulating protective gear before beginning work on the high voltage system.

Slowly lower the inverter (front), front traction motor, and reduction gear onto sandbags or similar objects, then disconnect the sling belts from the hoist.

CAUTION:

Use pieces of wood or other means to maintain the balance to prevent the inverter (front), front traction motor, and reduction gear from falling over.

Remove motor mounting bolts (), and then remove motor mounting RH .

Remove harness bracket mounting bolt ( ), and then remove harness bracket .

Remove three-phase bus bar cover mounting bolts (), and then remove three-phase bus bar cover .

WARNING:

When performing high voltage system operations, be sure to wear insulated protective gear.

CAUTION:

Do not remove the stator temperature sensor joint connector for the front traction motor from the three-phase bus bar cover.

The stator temperature sensor joint connector for the front traction motor is a non-reusable part. Do not reuse it.

Oil may leak out from the opening. If it does, use cloth or other material to wipe it up.

Disconnect the front traction motor stator temperature sensor harness connector .

Remove the gasket .

Remove three-phase bus bar terminal mounting bolts ().

WARNING:

When performing high voltage system operations, be sure to wear insulated protective gear.

CAUTION:

Never allow a terminal fixing bolt for the three-phase bus bar to fall into the inverter (front) during the removal operation.

If the terminals of three-phase harness have insulation tubes , do not to drop insulation tubes inside the front traction motor when removing the fixing bolts.

After loosening the terminal fixing bolts on the three-phase bus bar, cover all openings of the inverter (front) with tape or other similar material to prevent contamination from dust, dirt, or other foreign materials. When the Nissan Ariya vehicle needs to be left as it is for a prolonged period of time, place the three-phase bus bar cover in the original position.

Remove excitation cover mounting bolts (), and then remove excitation cover .

WARNING:

When performing high voltage system operations, be sure to wear insulated protective gear.

CAUTION:

Do not remove the breather from the excitation cover.

Never reuse breather.

Remove the excitation cover gasket .

Remove excitation-phase bus bar terminal mounting bolts ().

WARNING:

When performing high voltage system operations, be sure to wear insulated protective gear.

Remove mounting bolts () of inverter (front).

Remove the inverter (front).

CAUTION:

Keep the inverter (front) in the horizontal position when removing it.

Never bend or hit the three-phase bus bar.

When leaving the inverter (front), use wooden blocks to prevent three-phase bus bar interference.

Cover the three-phase bus bar with shop cloth .

Remove the seal on the excitation bus bar opening on the front traction motor side, and remove the seal on the three-phase bus bar opening.

CAUTION:

After removing inverter (front), cover the opening with tape to prevent dust, dirt, foreign material, etc. from entering them.

Never reuse the seal of excitation bus bar opening of the front traction motor side and the seal of three-phase bus bar opening after removal.

INSTALLATION

Note the following, and install in the reverse order of removal.

WARNING:

To prevent electric shock hazards, be sure to put on insulating protective gear before beginning work on the high voltage system.

CAUTION:

When the inverter (front) is replaced, perform "ADDITIONAL SERVICE WHEN REPLACING INVERTER (FRONT)". Refer to Work Procedure.

When the inverter (front) is installed, never bend three phase bus bar and excitation bus bar or give impact.
If the breather was removed from the excitation cover or replaced:
- Check that the O-ring is securely installed before installing the breather.
- After installing the breather, insert straight so that the distance the breather installation dimension from the edge of the case is A.
Step from edge of excitation cover to breather edge (A) : 0.55 mm (0.0217 in)
When installing the excitation wiring harness onto the excitation bus bar, install the red harness terminal (Ex+) onto the right side excitation bus bar, and the blue harness terminal (Ex-) onto the left excitation bus bar.
When installing the excitation cover gasket , check that the tab (A) is securely installed. The gasket is non-reusable part. Do not reuse it.
Follow the procedure below to install the excitation cover.
1. Tighten excitation cover mounting bolts to the temporarily tighten them in numerical order shown in the figure.
2. Tighten excitation cover mounting bolts to the specified torque in numerical order shown in the figure.
When installing the three-phase bus bar cover gasket , check that the tab (A) is securely installed. The gasket is non-reusable part. Do not reuse it.
Follow the procedure below to install the three-phase bus bar cover.
1. If the terminals of three-phase harness have insulation tubes , restore the insulation tube to the original position when installing the three-phase bus bar cover.
2. Partially tighten the three-phase bus bar cover mounting bolts in the order of 1→4 shown in the figure.
3. Fully tighten the three-phase bus bar cover mounting bolts in the order of 1→4 shown in the figure.
Partially tighten mounting bolt 1 in the figure for the motor mounting RH, then fully tighten in the order of 2→3, and finally fully tighten 1.

Installation Procedure when Installing the Suspension Member

Partially tighten the fastening bolts for the motor mounting bracket rear and motor mounting rear.
Partially tighten the fastening bolts of the motor mounting RH and motor mounting LH onto the suspension member.
Fully tighten the fastening bolts of the motor mounting bracket rear and motor mounting rear.
Fully tighten the fastening bolts of the motor mounting RH and motor mounting LH onto the suspension member.
When no external force is applied, check that there is no abnormal sagging or twisting of the mounts.

Checking After Suspension Member Installation

After installing the suspension member, check that each clearance is within the range of A and B.

If the clearance is outside the range, adjust so that it is within the range.

Dimension A : 11.0±1.0 mm (0.433±0.039 in)

Dimension B : 10.0±1.0 mm (0.394±0.039 in)
Partially tighten the bracket mounting bolts, then fully tighten them in the order of 1→2 shown in the figure.

INVERTER (FRONT) : Inspection

INSPECTION AFTER INSTALLATION

After installing the front traction motor, perform the following equipotential inspection.

Between inverter (front) and other high voltage system.
Between inverter (front) and body.

WARNING:

To prevent electric shock hazards, be sure to put on insulating protective gear before beginning work on the high voltage system.

Between front traction motor and ground to body

: less than 0.1 Ω

If result deviates from standard values, check that no paint, oil, dirt, or other substance is adhering to bolts or conductive mounting parts. If any such substance is adhering, clean the surrounding area and remove the substance.