Nissan Leaf. Manual - part 550

 

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Nissan Leaf. Manual - part 550

 

 

EVC-224

< DTC/CIRCUIT DIAGNOSIS >

P3117 A/C SYSTEM

P3117 A/C SYSTEM

Description

INFOID:0000000010120681

This DTC shows a decrease in insulation resistance of the high voltage circuit.

When detecting a decrease in insulation resistance of the high voltage circuit during use of air-conditioner,

VCM turns ON/OFF the electric compressor and the PTC heater to check changes in insulation resistance and

identifies a decrease in insulation resistance of the air-conditioning system.

DTC Logic

INFOID:0000000010120682

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-1

With CONSULT

1. Set the vehicle as the following condition and wait at least 30 minutes.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-225, "Diagnosis Procedure"

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Set the vehicle as the following condition and wait at least 30 minutes.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-225, "Diagnosis Procedure"

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P3117

A/C SYSTEM
(Air conditioner system)

When VCM detects a decrease in insulation resistance 
of A/C system.

• Electric compressor
• A/C refrigerant gas
• PTC heater

Power switch

READY

Vehicle speed

0 km/h (0 MPH)

A/C switch

ON

A/C set temperature

Full cold

Power switch

READY

Vehicle speed

0 km/h (0 MPH)

A/C switch

ON

A/C set temperature

Full hot

P3117 A/C SYSTEM

EVC-225

< DTC/CIRCUIT DIAGNOSIS >

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NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120683

1.

CHECK A/C REFRIGERANT GAS

Interview the customer and check maintenance records to see if there is possibility that a refrigerant gas other

than EV specific refrigerant gas is mixed in A/C refrigerant gas.

NOTE:

If A/C refrigerant gas other than EV specific refrigerant gas is used, insulation resistance may decrease.
Is the inspection result normal?

YES-1 (DTC P3117 is detected during Step 1 of DTC CONFIRMATION PROCEDURE)>>Replace 

electric

compressor. Refer to 

HA-37, "Removal and Installation"

 (with heat pump system) or 

HA-95,

"Removal and Installation"

 (without heat pump system).

YES-2 (DTC P3117 is detected during Step 2 of DTC CONFIRMATION PROCEDURE)>>Replace 

PTC

heater. Refer to 

HAC-201, "Removal and Installation"

 [auto A/C (with heat pump)] or 

HAC-359,

"Removal and Installation"

 [auto A/C (without heat pump)].

NO

>> Change A/C refrigerant gas and compressor oil.

EVC-226

< DTC/CIRCUIT DIAGNOSIS >

P311C HIGH VOLTAGE CIRCUIT

P311C HIGH VOLTAGE CIRCUIT

DTC Logic

INFOID:0000000010120684

DTC DETECTION LOGIC

NOTE:

If DTC P311C 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. Set the vehicle to READY.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-226, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120685

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.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P311C

HIGH VOLTAGE SYSTEM
(High voltage system)

Remains all of following condition for 0.2 seconds.
• Li-ion battery current: 5.5 A or more
• Input voltage to traction motor inverter: 24 V or less
• Pre-charge impossible

• High voltage circuit
• Li-ion battery J/B
• Traction motor inverter
• PDM (Power Delivery Mod-

ule)

• Electric compressor
• PTC heater

Remains all of following condition for 0.5 seconds.
• Li-ion battery current: less than 5.5 A
• Input voltage to traction motor inverter: 24 V or less
• Pre-charge impossible

Remains all of following condition for 0.5 seconds.
• Difference between Li-ion battery voltage and input volt-

age to traction motor inverter 100 V or more.

• Pre-charge impossible

P311C HIGH VOLTAGE CIRCUIT

EVC-227

< DTC/CIRCUIT DIAGNOSIS >

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• 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 SELF-DIAGNOSTIC RESULT IN TRACTION MOTOR INVERTER

With CONSULT

Check self-diagnostic result in “MOTOR”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

TMS-28, "DTC Index"

.

NO

>> GO TO 2.

2.

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 3.

3.

CHECK ELECTRIC COMPRESSOR

1. Disconnect electric compressor high voltage harness connector.

2. Check the short circuit between electric compressor terminals.

Standard

: 5 V or less 

JPCIA0296ZZ

 

 

 

 

 

 

 

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