Nissan Leaf. Manual - part 535

 

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Nissan Leaf. Manual - part 535

 

 

EVC-164

< DTC/CIRCUIT DIAGNOSIS >

P0AA1 SYSTEM MAIN RELAY +

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.

• To prevent the removed service plug from being connected by mistake during the procedure, always

carry it in your pocket or put it in the tool box.

• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses

before beginning work on the high voltage system.

• Clearly identify the persons responsible for high voltage work and ensure that other persons do not

touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or sim-

ilar item to prevent other persons from contacting them.

• Refer to 

EVC-10, "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.

• Erase DTC after the work is completed.

1.

CHECK SYSTEM MAIN RELAY DRIVE POWER VOLTAGE

1. Turn power switch OFF.

2. Disconnect Li-ion battery harness connector.

3. Check the voltage between Li-ion battery harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK SYSTEM MAIN RELAY DRIVE CIRCUIT

1. Disconnect VCM harness connector.

2. Check harness for short to power, between Li-ion battery harness connector and VCM harness connector.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts.

3.

PRECONDITIONING

WARNING:

Disconnect high voltage. Refer to 

GI-33, "How to Disconnect High Voltage"

.

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"

.

Relay

+

Voltage

Li-ion battery

Connector

Terminal

System main relay 1

B89

17

Ground

0 V

System main relay 2

14

Pre-charge relay

11

+

Voltage

Li-ion battery

Connector

Terminal

B89

17

Ground

0 V

14

11

P0AA1 SYSTEM MAIN RELAY +

EVC-165

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

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 4.

4.

CHECK ELECTRIC COMPRESSOR

1. Disconnect electric compressor high voltage harness connector.

2. Check the short circuit between electric compressor terminals.

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace electric compressor. And then, GO TO 9. Refer to 

HA-37, "Removal and Installation"

(With heat pump system) or 

HA-95, "Removal and Installation"

 (Without heat pump system).

5.

CHECK PTC HEATER

1. Disconnect Li-ion battery harness connector (H19).

2. Check the short circuit between Li-ion battery terminals.

Standard

: 5 V or less 

JPCIA0296ZZ

Electric compressor

Resistance

+

Terminal

1

2

3  k

Ω or more

Electric compressor

Resistance

+

Terminal

1

3

3  k

Ω or more

EVC-166

< DTC/CIRCUIT DIAGNOSIS >

P0AA1 SYSTEM MAIN RELAY +

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace PTC heater. And then, GO TO 9. Refer to 

HAC-198, "Removal and Installation"

 [(Auto A/

C (with heat pump)] or

HAC-359, "Removal and Installation"

 [(Auto A/C (without heat pump)].

6.

CHECK HIGH VOLTAGE HARNESS-1

1. Disconnect Li-ion battery harness connector (H3).

2. Check the short circuit between Li-ion battery harness connector terminals.

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> The high voltage harness within Li-ion battery may be shorted. Check the related circuits. And

then, GO TO 9.

NO

>> GO TO 7.

7.

CHECK TRACTION MOTOR INVERTER

1. Remove PDM (Power Delivery Module). Refer to 

VC-112, "Removal and Installation"

.

2. Check the short circuit between traction motor inverter termi-

nals.

Is the inspection result normal?

YES

>> GO TO 8.

Connected to:

Li-ion battery

Resistance

Connector

+

Terminal

PTC heater

H19

40

41

3 k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

Terminal

PTC heater

H19

40

41

3 k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

Terminal

PDM (Power Delivery 

Module)

H3

37

38

3 k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

Terminal

PDM (Power Delivery 

Module)

H3

37

38

3 k

Ω or more

Resistance

: more than 3 k

JSCIA0696ZZ

P0AA1 SYSTEM MAIN RELAY +

EVC-167

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

NO

>> Replace traction motor inverter. And then, GO TO 9. Refer to 

TMS-103, "Removal and Installa-

tion"

.

8.

CHECK HIGH VOLTAGE HARNESS-2

1. Remove high voltage harness from PDM (Power Delivery Module). Refer to 

VC-112, "Removal and Instal-

lation"

.

2. Check the short circuit between high voltage harness connector (Li-ion battery side) and high voltage har-

ness connector [PDM (Power Delivery Module) side].

With heat pump system

Without heat pump system

3. Check the short circuit between high voltage harness connector (electric compressor side) and high volt-

age harness connector [PDM (Power Delivery Module) side].

with heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace malfunctioning harness. And then, GO TO 9.

9.

REPLACE BATTERY JUNCTION BOX

Replace battery junction box. Refer to 

EVB-206, "BATTERY JUNCTION BOX AND BATTERY HARNESS :

Disassembly and Assembly"

.

>> INSPECTION END

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

Terminal

Li-ion battery

H5

38

39

3 k

Ω or more

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

Terminal

Li-ion battery

H18

38

39

3 k

Ω or more

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

Terminal

Electric compressor

H22

42

41

3 k

Ω or more

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

Terminal

Electric compressor

H7

41

42

3 k

Ω or more

 

 

 

 

 

 

 

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