Content .. 536 537 538 539 ..

Nissan Leaf. Manual - part 538

EVC-176

< DTC/CIRCUIT DIAGNOSIS >

P0AA5 SYSTEM MAIN RELAY -

Is the inspection result normal?

YES

>> GO TO 3.

>> Check the relay circuit of Li-ion battery for malfunction. If no malfunction is found, replace battery

junction box. Refer to

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

sembly and Assembly"

CHECK HARNESS

1. Disconnect VCM harness connector.

2. Check the continuity between VCM harness connector and Li-ion battery harness connector.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-53, "Intermittent Incident"

>> Repair harness or connector.

−

Continuity

VCM

Li-ion battery

Connector

terminal

Connector

terminal

E61

B89

Existed

P0AA6 HIGH VOLTAGE SYSTEM ISOLATION

EVC-177

< DTC/CIRCUIT DIAGNOSIS >

EVC

P0AA6 HIGH VOLTAGE SYSTEM ISOLATION

Description

INFOID:0000000010120633

Li-ion battery is equipped with the IR (Insulation resistance) sensing system. VCM receives the IR sensor sig-

nal sent from Li-ion battery controller and monitors the insulation resistance of the high voltage circuit.

DTC Logic

INFOID:0000000010120634

DTC DETECTION LOGIC

NOTE:

• DTC “P0AA6” is not detected when insulation resistance decreases between quick charge relay and quick

charge port. In this case, insulation check performed by the quick charger becomes NG, resulting in no

implementation of quick charge.

• DTC “P0AA6” is not detected when insulation resistance decreases between normal charge port and PDM

(Power Delivery Module). In this case, the “Fault” lamp of EVSE control box blinks and normal charge does

not start even when trying to perform normal charge.

DTC CONFIRMATION PROCEDURE

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.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

1. Maintain the following conditions for at least 50 seconds.

2. Check DTC.
Is the DTC detected?

YES

>> Proceed to

EVC-178, "Diagnosis Procedure"

>> GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Maintain the following conditions for at least 30 minutes.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0AA6

HYBRID BATT VOLT SYS
ISOLATION
(Hybrid battery voltage sys-
tem isolation fault)

VCM detects a insulation resistance calculated
based on IR sensor signal sent from Li-ion battery
is 380 k

Ω or less.

• High voltage harness or connectors
• Electric compressor
• PTC heater
• Traction motor
• PDM (Power Delivery Module)
• Li-ion battery

Power switch

READY

Shift position

P range

A/C set temperature

OFF

Power switch

READY

EVC-178

< DTC/CIRCUIT DIAGNOSIS >

P0AA6 HIGH VOLTAGE SYSTEM ISOLATION

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-178, "Diagnosis Procedure"

>> GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-3

With CONSULT

1. Maintain the following conditions for at least 30 minutes.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-178, "Diagnosis Procedure"

>> GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE-4

With CONSULT

1. Shift selector lever in D position.

2. Drive the vehicle at more than 15 km (10 MPH) at least 40 seconds.

CAUTION:

Always drive vehicle at safe speed.

3. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-178, "Diagnosis Procedure"

>> GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE-5

With CONSULT

1. Stop the vehicle and turn power switch OFF.

2. Connect quick charge connector.

3. Perform quick charging (charging status indicator is ON) at least 20 seconds.

4. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-178, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120635

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.

• 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.

Shift position

P range

A/C set temperature

Full cold

Power switch

READY

Shift position

P range

A/C set temperature

Full hot

P0AA6 HIGH VOLTAGE SYSTEM ISOLATION

EVC-179

< DTC/CIRCUIT DIAGNOSIS >

EVC

• 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.

CHECK HIGH VOLTAGE PART

1. Turn power switch OFF.

2. Visually check that there is no damage in each high voltage part.
Is the inspection result normal?

YES

>> GO TO 2

>> Repair or replace the error-detected part.

IDENTIFY THE MODE USED AT THE OCCURRENCE OF MALFUNCTION

On which DTC Confirmation Procedure is the DTC P0AA6 detected?

DTC Confirmation Procedure-1>>GO TO 12.

DTC Confirmation Procedure-2>>GO TO 3.

DTC Confirmation Procedure-3>>GO TO 6.

DTC Confirmation Procedure-4>>GO TO 8.

DTC Confirmation Procedure-5>>GO TO 10.

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"

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.

Standard

: 5 V or less

JPCIA0296ZZ

Content .. 536 537 538 539 ..