Nissan Leaf. Manual - part 1199

P3241 DRIVE MOTOR A INVERTER CRNT CONT

TMS-77

< DTC/CIRCUIT DIAGNOSIS >

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Check voltage in high voltage circuit. (Check that condenser are discharged.)

1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to 

EVB-181, "Exploded View"

.

2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion

battery. Refer to 

EVB-181, "Removal and Installation"

.

3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector

terminals.

DANGER:

 

 Touching high voltage components without using the appropriate protective equipment will

cause electrocution.

CAUTION:

For voltage measurements, use a tester which can measure to 500 V or higher.

>> GO TO 2.

2.

CHECK THE CONNECTION CONDITIONS OF THE 3-PHASE BUS BAR

Remove bus bar cover from traction motor and check the tightness of the 3-phase bus bar. Refer to 

TMS-109,

"Exploded View"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Tighten the 3-phase bus bar to the specified torque. Refer to 

TMS-109, "Exploded View"

.

3.

CHECK DISCONNECTION TRACTION MOTOR STATOR COIL

1. Remove the traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

2. Check stator coil for open circuit from the opening of the traction motor 3-phase bus bar.

Is the inspection result normal?

YES

>> Replace the traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

NO

>> Replace the traction motor. Refer to 

TMS-109, "Removal and Installation"

.

Standard

: 5 V or less 

JPCIA0296ZZ

3-phase bus bar

Resistance

Terminal

U-phase

V-phase

1

Ω or less

V-phase

W-phase

W-phase

U-phase

TMS-78

< DTC/CIRCUIT DIAGNOSIS >

P3242 D-MOTOR A PHASE U CURRENT SEN

P3242 D-MOTOR A PHASE U CURRENT SEN

DTC Logic

INFOID:0000000010120976

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always power switch OFF and wait

at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Power switch ON and wait for 10 seconds or more.

2. Check DTC.
Is “P3242” detected?

YES

>> Go to 

TMS-78, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010120977

1.

REPLACE TRACTION MOTOR INVERTER

Replace the traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

>> END

DTC

CONSULT screen terms

(Trouble diagnosis content)

Malfunction detected condition

Possible cause

P3242

D-MOTOR A PHASE U CURRENT SEN 2
(Drive Motor “A” Phase U Current Sensor 
Circuit)

Abnormal detection value of the traction 
motor U-phase current sensor 2

Traction motor inverter

P3243 D-MOTOR A PHASE V CURRENT SEN

TMS-79

< DTC/CIRCUIT DIAGNOSIS >

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P3243 D-MOTOR A PHASE V CURRENT SEN

DTC Logic

INFOID:0000000010120978

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always power switch OFF and wait

at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Power switch ON and wait for 10 seconds or more.

2. Check DTC.
Is “P3243” detected?

YES

>> Go to 

TMS-79, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010120979

1.

REPLACE TRACTION MOTOR INVERTER

Replace the traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

>> END

DTC

CONSULT screen terms

(Trouble diagnosis content)

Malfunction detected condition

Possible cause

P3243

D-MOTOR A PHASE V CURRENT SEN 2
(Drive Motor “A” Phase V Current Sensor 
Circuit)

Abnormal detection value of the traction 
motor V-phase current sensor 2

Traction motor inverter

TMS-80

< DTC/CIRCUIT DIAGNOSIS >

P3244 DRIVE MOTOR A INVERTER

P3244 DRIVE MOTOR A INVERTER

DTC Logic

INFOID:0000000010120980

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always power switch OFF and wait

at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Set the vehicle to READY and wait for 15 seconds or more.

2. Accelerate to 60 km/h (37 MPH).

3. Stop the vehicle.

4. Check DTC.
Is “P3244” detected?

YES

>> Go to 

TMS-80, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010120981

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 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 perform-

ing 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 vehicle containing high voltage

parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-

lating sheet except when using them.

• Refer to 

TMS-5, "High Voltage 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.

1.

CHECK DTC HIGH VOLTAGE SYSTEMS

DTC

CONSULT screen terms

(Trouble diagnosis content)

Malfunction detected condition

Possible causes

P3244

DRIVE MOTOR A INVERTER
(Drive Motor “A” Inverter Volt-
age Sensor Performance)

High voltage detection value of Li-ion battery 
controller differs largely from that of traction 
motor inverter for 10 consecutive seconds or 
more

• Traction motor inverter
• High voltage harness or connector
• Li-ion battery
• High voltage parts except for trac-

tion motor inverter