Nissan Leaf. Manual - part 467

P33E6 CELL CONTROLLER

EVB-151

< DTC/CIRCUIT DIAGNOSIS >

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1. Check the resistance Li-ion battery controller harness connector   and bus bar   of the determined cell

at step 5.

2. Check the divergence of the resistance and the resistance of other cell harness.
Is the inspection result normal?

YES

>> Replace module within the determined cell at step 5.

NO

>> Repair or replace harness or connectors.

Terminal

Resistance val-

ue

Li-ion battery control-

ler harness connector

Bus bar

Approx. 0 

Ω

JSCIA0812GB

EVB-152

< DTC/CIRCUIT DIAGNOSIS >

P33EA BATTERY HEATER RELAY

P33EA BATTERY HEATER RELAY

DTC Logic

INFOID:0000000010121152

DTC DETECTION LOGIC

NOTE:

• The Li-ion battery controller transmits a relay control signal to the heater relay unit and turns ON/OFF the

relay built-in the heater relay unit.

• The heater relay unit turns ON/OFF the built-in relay, according to a relay control signal transmitted from the

Li-ion battery controller, and transmits a relay status signal (the ON/OFF status of the built-in relay) to the Li-

ion battery controller.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

1. Select “ACTIVE TEST” of “HV BAT.”

2. Select “HEATER RELAY UNIT.” Touch “START.”

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Select “Self Diagnostic Result” of “HV BAT”.

2. Check DTC.
Is P33EE detected?

YES

>> Refer to 

EVB-152, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010121153

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 

EVB-7, "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.

PRECONDITIONING

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

P33EA

BATTERY HEATER RELAY

Li-ion battery controller judges that the status of a relay control 
signal transmitted from Li-ion battery controller and that of a 
relay status signal transmitted from heater relay unit do not 
match.

• Li-ion battery controller
• Heater relay unit
• Harness or connector

P33EA BATTERY HEATER RELAY

EVB-153

< DTC/CIRCUIT DIAGNOSIS >

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WARNING:

Shut off high voltage circuit. Refer to 

GI-33, "How to Disconnect High Voltage"

.

1. Remove Li-ion battery. Refer to 

EVB-181, "Removal and Installation"

.

2. Remove battery pack upper case. Refer to 

EVB-191, "BATTERY PACK UPPER CASE : Removal and

Installation"

.

>> GO TO 2.

2.

CHECK CONTINUITY LI-ION BATTERY CONTROLLER AND HEATER RELAY UNIT

1. Remove service plug switch bracket. Refer to 

EVB-204, "BATTERY JUNCTION BOX AND BATTERY

HARNESS : Exploded View"

.

2. Disconnect Li-ion battery controller harness connector and heater relay unit harness connector.

3. Check continuity Li-ion battery controller harness connector and heater relay unit harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK CONTINUITY LI-ION BATTERY AND HEATER RELAY UNIT

Check continuity Li-ion battery harness connector and heater relay unit harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK CONTINUITY HEATER RELAY UNIT AND LI-ION BATTERY CONTROLLER

Check continuity heater relay unit harness connector and Li-ion battery controller harness connector.

Is the inspection result normal?

YES

>> Replace to shown in the below.

• Li-ion battery controller. Refer to 

EVB-201, "LI-ION BATTERY CONTROLLER : Removal and

Installation"

.

• Heater relay unit. Refer to 

EVB-221, "LI-ION BATTERY HEATER RELAY UNIT : Disassembly

and Assembly"

.

NO

>> Repair harness or connector.

Lli-ion battery controller

Heater relay unit

Continuity

Connector

Terminal

Connector

Terminal

LB11

20

LB17

3

Existed

18

6

Lli-ion battery

Heater relay unit

Continuity

Connector

Terminal

Connector

Terminal

LB1

31

LB17

1

Existed

Heater relay unit

Li-ion battery controller

Continuity

Connector

Terminal

Connector

Terminal

LB17

4

LB11

8

Existed

8

7

7

5

6

EVB-154

< DTC/CIRCUIT DIAGNOSIS >

P33EB TEMPERATURE SENSOR

P33EB TEMPERATURE SENSOR

DTC Logic

INFOID:0000000010121154

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

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

2. Select “Self Diagnostic Result” of “HV BAT”.

3. Check DTC.
Is P33EB detected?

YES

>> Refer to 

EVB-154, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010121155

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 

EVB-7, "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.

PRECONDITIONING

WARNING:

Disconnect the high voltage. Refer to 

GI-33, "How to Disconnect High Voltage"

.

1. Remove Li-ion battery. Refer to 

EVB-181, "Removal and Installation"

.

2. Remove battery pack upper case. Refer to 

EVB-191, "BATTERY PACK UPPER CASE : Removal and

Installation"

.

>> GO TO 2.

2.

CHECK BATTERY TEMPERATURE SENSOR

Refer to 

EVB-155, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace all battery temperature sensor.

NO

>> Replace applicable battery temperature sensor.

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

P33EB

TEMPERATURE SENSOR

Deviation in characteristics of battery temperature sensor 
1, 2 or 4.

Battery temperature sensor