Nissan Leaf. Manual - part 576

EVC-328

< DTC/CIRCUIT DIAGNOSIS >

P31D5 PRE-CHARGE RELAY

with heat pump system

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace malfunctioning harness. And then, GO TO 10.

9.

CHECK PDM (POWER DELIVERY MODULE)

Check the short circuit between PDM (Power Delivery Module) terminals.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace PDM (Power Delivery Module). And then, GO TO 10. Refer to 

VC-112, "Removal and

Installation"

.

10.

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

Electric compressor

H7

41

42

3 k

Ω or more

PDM (Power Delivery Module)

Resistance

+

−

Terminal

38

39

3 k

Ω or more

P31D6 F/S RELAY

EVC-329

< DTC/CIRCUIT DIAGNOSIS >

D

E

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EVC

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P31D6 F/S RELAY

DTC Logic

INFOID:0000000010120794

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. Turn power switch ON and wait at least 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-329, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120795

1.

CHECK F/S RELAY OUTPUT VOLTAGE-1

1. Turn power switch OFF.

2. Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK F/S RELAY DRIVE CIRCUIT VOLTAGE-1

Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31D6

F/S RELAY
(Fail-safe relay)

VCM detected the F/S relay stuck

• Harness or connectors
• IPDM  E/R
• VCM

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

55

Ground

0 V

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

60

Ground

12V battery volt-

age

EVC-330

< DTC/CIRCUIT DIAGNOSIS >

P31D6 F/S RELAY

YES

>> GO TO 5.

NO

>> GO TO 3.

3.

CHECK F/S RELAY DRIVE CIRCUIT VOLTAGE-2

1. Disconnect VCM harness connector.

2. Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Replace VCM. Refer to 

EVC-423, "Removal and Installation"

.

NO

>> GO TO 4.

4.

CHECK F/S RELAY DRIVE CIRCUIT

1. Disconnect IPDM E/R harness connector.

2. Check harness for short to ground, between VCM harness connector and IPDM E/R harness connector.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts.

5.

CHECK F/S RELAY OUTPUT VOLTAGE-2

1. Disconnect IPDM E/R harness connector.

2. Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-29, "Removal and Installation"

.

NO

>> GO TO 6.

6.

CHECK F/S RELAY OUTPUT VOLTAGE-3

1. Disconnect VCM harness connector.

2. Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Replace VCM. Refer to 

EVC-423, "Removal and Installation"

.

NO

>> Check harness for short to power, between VCM harness connector and IPDM E/R harness con-

nector.

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

60

Ground

12V battery volt-

age

+

−

Continuity

IPDM E/R

Connector

Terminal

E15

60

Ground

Not existed

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

55

Ground

0 V

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

55

Ground

0 V

P31D7 F/S RELAY

EVC-331

< DTC/CIRCUIT DIAGNOSIS >

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EVC

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P31D7 F/S RELAY

DTC Logic

INFOID:0000000010120796

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 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-331, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120797

1.

CHECK FUSE

1. Turn power switch OFF.

2. Pull out #64 fuse.

3. Make sure that fuse is not fusing.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the fuse after repairing the applicable circuit.

2.

CHECK 12V BATTERY POWER SUPPLY

1. Insert the fuse which pulled out.

2. Disconnect IPDM E/R harness connector (E9).

3. Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check 12V battery power supply routing circuit.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31D7

F/S RELAY
(Fail-safe relay)

VCM detected the F/S relay open

• Harness or connectors
• IPDM  E/R
• VCM

+

−

Voltage

IPDM E/R

Connector

Terminal

E9

2

Ground

12V battery volt-

age