Nissan Leaf. Manual - part 562

EVC-272

< DTC/CIRCUIT DIAGNOSIS >

P3178 ECU ACTIVATION ERROR

NO

>> Check high voltage harness connector installation condition of Li-ion battery and traction motor

inverter.

P3179, P317A, P317B TRACTION MOTOR INVERTER

EVC-273

< DTC/CIRCUIT DIAGNOSIS >

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P3179, P317A, P317B TRACTION MOTOR INVERTER

DTC Logic

INFOID:0000000010120733

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

NOTE:

This DTC is displayed when the traction motor inverter detects a DTC. If this DTC is displayed, perform trouble

diagnosis for a DTC that detected by traction motor inverter. 

>> Proceed to 

EVC-273, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010120734

Perform the self-diagnosis of traction motor inverter.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P3179

MOTOR SYSTEM
(Motor system)

VCM detects an error signal that is received from traction motor 
inverter via CAN communication for 0.01 seconds or more.

Traction motor inverter

P317A

P317B

EVC-274

< DTC/CIRCUIT DIAGNOSIS >

P317D TRACTION MOTOR INVERTER

P317D TRACTION MOTOR INVERTER

DTC Logic

INFOID:0000000010120735

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

• Turn power switch OFF and wait at least 90 seconds.

CAUTION:

During this period, never perform vehicle handling such as opening and closing of doors. If some

kind of vehicle handling is performed, then wait another 90 seconds or more from the time of the

vehicle handling.

• Make sure that 12V battery voltage is 11 V or more.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Set the vehicle to READY and perform test drive.

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

DTC can be reproduced more easily when vehicle speed is higher.

2. Check DTC.
Is DTC detected? 

YES

>> Proceed to 

EVC-274, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120736

1.

CHECK TRACTION MOTOR TORQUE

With CONSULT

1. On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “TRG MOTOR TORQ 1” and “CUR-

RENT MOTOR TORQ”.

2. Shift selector lever in P range.

3. Set the vehicle to READY.

4. Check that the difference between values indicated by “TRG MOTOR TORQ 1” and “CURRENT MOTOR

TORQ” is within 20 N·m.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

2.

REPLACE VCM

1. Replace VCM. Refer to 

EVC-423, "Removal and Installation"

.

2. Turn power switch ON and erase DTC.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P317D

MOTOR SYSTEM
(Motor system)

• The estimated torque value from the traction motor inverter 

to VCM remains greater/smaller than the torque command 
value from VCM to the traction motor inverter for the speci-
fied time.

• The difference between the estimated power consumption 

calculated based on a torque value from VCM to the traction 
motor inverter and the actual power consumption calculated 
based on a high voltage battery voltage and current is 54 kW 
or more. 

• Traction motor inverter
• VCM

P317D TRACTION MOTOR INVERTER

EVC-275

< DTC/CIRCUIT DIAGNOSIS >

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3. Perform DTC confirmation procedure. Refer to 

EVC-274, "DTC Logic"

.

Is DTC “P317D” detected again?

YES

>> Replace traction motor inverter. Refer to 

TMS-103, "Removal and Installation"

.

NO

>> INSPECTION END