Nissan Leaf. Manual - part 533

EVC-156

< DTC/CIRCUIT DIAGNOSIS >

P0A8F 12V BATTERY POWER SUPPLY

NO

>> Repair or replace error-detected parts.

P0A94 DC/DC CONVERTER

EVC-157

< DTC/CIRCUIT DIAGNOSIS >

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P0A94 DC/DC CONVERTER

DTC Logic

INFOID:0000000010120621

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 wait at least 10 seconds.

2. Check self-diagnostic result.
Is DTC detected?

YES

>> Proceed to 

EVC-157, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120622

1.

CHECK DC/DC CONVERTER STATUS SIGNAL

With CONSULT

1. On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “DC/DC CONV STATUS”. 

2. Check that the value of “DC/DC CONV STATUS” is other than “3”.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK SELF-DIAGNOSTIC RESULT IN PDM (POWER DELIVERY MODULE)

With CONSULT

Check self-diagnostic result in “CHARGER/PD MODULE”.
Is any DTC detected?

YES

>> Perform trouble diagnosis for detected DTC. Refer to 

VC-34, "DTC Index"

.

NO

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

3.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Erase DTC.

2. Perform DTC confirmation procedure again. Refer to 

EVC-157, "DTC Logic"

.

Is DTC P0A94 detected again?

YES

>> Replace VCM. Refer to 

EVC-423, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0A94

DC/DC CONVERTER
(DC/DC converter perfor-
mance)

During READY, the following state continues for 2.5 seconds 
or more: 
The VCM power supply voltage is less than 12.48 V and VCM 
detects a malfunction in the DC/DC converter.

•  DC/DC converter
• VCM

EVC-158

< DTC/CIRCUIT DIAGNOSIS >

P0AA0 SYSTEM MAIN RELAY

P0AA0 SYSTEM MAIN RELAY

DTC Logic

INFOID:0000000010120623

DTC DETECTION LOGIC

NOTE:

If DTC P0AA0 is displayed with DTC P0AA2, P0AA5, P31D4, P31DB, P31DC, or P31DD, perform diagnosis

for DTC P0AA2, P0AA5, P31D4, P31DB, P31DC, or P31DD.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

CAUTION:

Since this DTC may be displayed if a malfunction is detected in other systems, check them for mal-

function before performing this diagnosis.

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

2. Check self-diagnostic result.
Is DTC “P0AA0” detected?

YES

>> Proceed to 

EVC-158, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120624

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.

• 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"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0AA0

HYBRID BATT POSITIVE 
CONTACTOR
(Hybrid battery positive 
contactor circuit)

• A traction motor inverter input voltage is 240 V or more for 9 

seconds or more while starting the EV system.

• A traction motor inverter input voltage is 190 V or more for 1 

minute or more while starting the EV system.

• Harness or connectors
• Battery J/B
• Electric compressor
• PTC heater
• Traction motor inverter
• High voltage harness

P0AA0 SYSTEM MAIN RELAY

EVC-159

< DTC/CIRCUIT DIAGNOSIS >

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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"

.

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:

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

JPCIA0296ZZ