Nissan Leaf. Manual - part 1185

DIAGNOSIS SYSTEM (TRACTION MOTOR INVERTER)

TMS-21

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (TRACTION MOTOR INVERTER)

DIAGNOSIS DESCRIPTION
DIAGNOSIS DESCRIPTION : System Description

INFOID:0000000010120908

This is an on-board trouble diagnosis system which automatically detects malfunction. Detected malfunction is

memorized in ECU as DTC. Diagnosis information can be confirmed using CONSULT.

DIAGNOSIS DESCRIPTION : DTC and Freeze Frame Data

INFOID:0000000010120909

NOTE:

Operate the power switch from OFF to ON. This operation is defined as 1 trip.

• DTC (P0A1B, P0A8D, P0C79, etc.) is specified by SAE J2012/ISO 15031-6.

• Traction motor inverter memorizes DTC and freeze frame data when malfunction is detected.

• Traction motor inverter can memorize plural DTCs but only 1 set of freeze frame data.

• Freeze frame data is not updated even if a different DTC is detected in another trip. The first memorized data

is kept as freeze frame data.

• The procedure to erase DTC from traction motor inverter memory is described in “How to Erase DTC”. Refer

to 

TMS-21, "CONSULT Function"

.

DIAGNOSIS DESCRIPTION : Counter System

INFOID:0000000010120910

Counter system counts up at every operation of  power switch from OFF to ON under condition that the same

malfunction is not detected. On the other hand, if the same DTC as memorized one is detected again, the

count is reset and the counter system counts up again from “0”.

CONSULT Function

INFOID:0000000010120911

APPLICATION ITEM

WORK SUPPORT

SELF DIAGNOSTIC RESULTS

Display Item List

Refer to 

TMS-28, "DTC Index"

.

How to Read DTC

DTC is displayed on “Self Diagnostic results” of CONSULT.

When DTC is currently detected, “CRNT” is displayed. If “PAST” is displayed, it shows a malfunction occurred

in the past.The trip number of drive without malfunction of concerned DTC can be confirmed with “IGN

counter” inside “FFD”.

Item

Function

All DTC Reading

Display all DTCs or diagnostic items that all ECUs are recording and judging.

Work Support

This mode enables a technician to adjust some devices faster and more accurately.

Self Diagnostic Results

Retrieve DTC from ECU and display diagnostic items.

Data Monitor

Monitor the input/output signal of the control unit in real time.

CAN Diagnosis

This mode displays a network diagnosis result about CAN by diagram.

CAN Diagnosis Support Monitor

It monitors the status of CAN communication.

ECU Identification

Display the ECU identification number (part number etc.) of the selected system.

Item

Description

RESOLVER WRITE

Performs writing of traction motor resolver offset.

CLEAR OUTPUT LIMIT REASON

Resets output limit history of traction motor and traction motor inverter.
NOTE:
Resets “OUTPUT LIMIT MOTOR TEMP” and “OUTPUT LIMIT INV TEMP” values of data 
monitor.

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< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TRACTION MOTOR INVERTER)

How to Erase DTC

NOTE:

If the power switch is kept ON after repair operation, operate the power switch to OFF. Operate the power

switch to ON again after waiting at least 10 seconds.

1. Touch “MOTOR CONTROL” of CONSULT.

2. Touch “Self Diagnostic Result”.

3. Touch “Erase”. (DTC memorized in electric traction motor inverter is erased.)

IGN Counter

IGN counter is displayed in “FFD”. It displays the number of operations of power switch from OFF to ON after

DTC recovery to normal.

• If malfunction (DTC) is currently detected, “0” is displayed.

• The displayed number counts up at each operation of power switch from OFF to ON after recovery to nor-

mal, such as 1 

→ 2 → 3...38 → 39.

• When the number reaches to 40, DTC is erased.

NOTE:

The counter display of  “40” cannot be checked.

FREEZE FRAME DATA (FFD)

The following vehicle status is recorded when DTC is detected and is displayed on CONSULT.

Monitored item (Unit)

Remarks

DTC

Displays the DTC which caused FFD memory

12V POWER VOLTAGE

(V) Displays 12V battery power voltage input to traction motor inverter

CODE IN INVERTER

Displays the trouble code inside traction motor inverter

RESOLVER OFFSET VALUES (1st and 
2nd symbols) 

Displays 1st and 2nd symbols of traction motor resolver offset value written in 
traction motor inverter

DIAGNOSIS START HISTORY 1

Displays if DTC detection mode is started

DIAGNOSIS START HISTORY 2

DPA REQUEST

Displays the request status of DPA

TORQUE LIMIT RATE 1

(%) Displays the motoring torque limit rate

TORQUE LIMIT RATE 2

(%) Displays the regeneration torque limit rate

MOTOR TEMPERATURE

(

°C or °F) Displays the temperature of traction motor

MAX MOTOR TEMPERATURE

(

°C or °F) Displays the highest temperature of traction motor detected

INV INPUT HIGH VOLTAGE

(V) Displays high voltage input to traction motor inverter

COMMAND TORQUE

(Nm) Displays the torque command value from VCM via EV system CAN

INSIDE COMMAND TORQUE

(Nm) Displays the torque command value in motor controller

MOTOR SPEED

(rpm) Displays the traction motor speed

MOTOR d CURRENT

(A) Displays the detected value of current (d-axis) of traction motor

MOTOR q CURRENT

(A) Displays the detected value of current (q-axis) of traction motor

U PHASE CURRENT

(A) Displays the U-phase current detected value

V PHASE CURRENT

(A) Displays the V-phase current detected value

PHASE ANGLE

(deg) Displays the turning angle position of rotor

SEQUENCE MODE

Displays the sequence number in motor controller

CARRIER FREQUENCY

Displays the carrier frequency

IGBT HIGH TEMP DETECT

Displays the status of high temperature detection of IGBT

HIGH VOLTAGE SUPPLY

Displays the high voltage supply status from VCM via EV system CAN

VOLTAGE (S1-S3)

(V) Displays the S1-S3 of resolver detected voltage

VOLTAGE (S2-S4)

(V) Displays the S2-S4 of resolver detected voltage

ERROR LEVEL 1

Displays the diagnosis flag of resolver IC

ERROR LEVEL 2

ERROR LEVEL 3

DIAGNOSIS SYSTEM (TRACTION MOTOR INVERTER)

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< SYSTEM DESCRIPTION >

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DATA MONITOR

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applica-

bleto this vehicle, refer to CONSULT display items.

ERROR CODE 1

Displays the diagnosis results of resolver IC

ERROR CODE 2

RESOLVER VOLTAGE

(V) Displays the power supply voltage of resolver

5V POWER SUPPLY

(V) Displays the 5V control power supply voltage

3V POWER SUPPLY

(V) Displays the 3V control power supply voltage

Monitored item (Unit)

Remarks

Monitored item (Unit)

Remarks

MOTOR TEMPERATURE

(

°C or °F) Displays the temperature of traction motor

12V POWER VOLTAGE

(V) Displays 12V battery power voltage input to traction motor inverter

INV INPUT HIGH VOLTAGE

(V) Displays high voltage input to traction motor inverter

COMMAND TORQUE

(Nm) Displays the torque command value from VCM via EV system CAN

MOTOR SPEED

(rpm) Displays the traction motor speed

SEQUENCE MODE

Displays the sequence number in motor controller

OUTPUT LIMIT MOTOR TEMP

• Displays presence of output limit due to traction motor temperature increase 

after last deletion of output limit history

• Values can be reset using “CLEAR OUTPUT LIMIT REASON” of work sup-

port

OUTPUT LIMIT INV TEMP

• Displays presence of output limit due to temperature increase inside traction 

motor inverter after last deletion of output limit history

• Values can be reset using “CLEAR OUTPUT LIMIT REASON” of work sup-

port

CARRIER FREQUENCY

Displays the carrier frequency

HIGH VOLTAGE SUPPLY

Displays the high voltage supply status from VCM via EV system CAN

CHARGE RELAY READY REQ

Displays the state of charge judgment start request of high voltage circuit

SHIFT POSITION (VCM)

Displays the shift position from VCM via EV system CAN

TMS-24

< ECU DIAGNOSIS INFORMATION >

TRACTION MOTOR INVERTER

ECU DIAGNOSIS INFORMATION

TRACTION MOTOR INVERTER

Reference Value

INFOID:0000000010120912

CONSULT DATA MONITOR STANDARD VALUE

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

TERMINAL LAYOUT

PHYSICAL VALUES

CAUTION:

Monitor item

Condition

Value / Status (Approx.)

MOTOR TEMPERATURE

READY (stop the vehicle)

Almost same as coolant temperature af-
ter temperature saturation. [approxi-
mately within 10

°C (50°F) of coolant 

temperature]

During driving

The value changes along with accelera-
tion/deceleration.

12V POWER VOLTAGE

Power switch ON

9 – 16 V

INV INPUT HIGH VOLTAGE

READY (stop the vehicle) and during driving

240 – 403 V

COMMAND TORQUE

During driving

The value changes along with accelera-
tion/deceleration.

MOTOR SPEED

READY (stop the vehicle)

0 rpm

During driving

The value changes along with accelera-
tion/deceleration.

SEQUENCE MODE

READY (stop the vehicle)

11

OUTPUT LIMIT MOTOR TEMP

When the vehicle has history of output limit

Yes

When output limit is reset

None

OUTPUT LIMIT INV TEMP

When the vehicle has history of output limit

Yes

When output limit is reset

None

CARRIER FREQUENCY

READY (stop the vehicle)

5k

HIGH VOLTAGE SUPPLY

READY (stop the vehicle)

SUPPLY

CHARGE RELAY READY REQ

READY (stop the vehicle)

ON

SHIFT POSITION (VCM)

READY (stop the vehicle)

P position

P

R position

R

N position

N

D position

D

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