Nissan Leaf. Manual - part 552

 

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Nissan Leaf. Manual - part 552

 

 

EVC-232

< DTC/CIRCUIT DIAGNOSIS >

P312A EV SYSTEM CAN COMMUNICATION

YES

>> Proceed to 

EVC-232, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120688

1.

CHECK VCM POWER SUPPLY-1

1. Turn power switch ON.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUSE

1. Turn power switch OFF.

2. Pull out #55 fuse.

3. Check the fuse is not fusing.
Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-29, "Removal and Installation"

.

NO

>> Replace the fuse after repairing the applicable circuit.

3.

CHECK VCM POWER SUPPLY-2

1. Turn power switch OFF.

2. Disconnect VCM harness connector.

3. Turn power switch ON.

4. Check the voltage between VCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK VCM POWER SUPPLY CIRCUIT

1. Turn power switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity 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.

+

−

Voltage

IPDM E/R

Connector

Terminal

E15

57

Ground

12V battery volt-

age

+

−

Voltage

VCM

Connector

Terminal

E61

51

Ground

12V battery volt-

age

+

−

Continuity

IPDM E/R

VCM

Connector

Terminal

Connector

Terminal

E15

57

E61

51

Existed

P312A EV SYSTEM CAN COMMUNICATION

EVC-233

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

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EVC

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5.

CHECK VCM POWER SUPPLY-3

1. Turn power switch OFF.

2. Disconnect VCM harness connector.

3. Check the voltage between VCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

CHECK VCM POWER SUPPLY-4

1. Disconnect ignition relay-2 (fuse block).

2. Check the voltage between VCM harness connector and ground.

Is the inspection result normal?

YES

>> The ignition relay-2 may stick to ON. Check the related circuits.

NO

>> The harness between fuse block and VCM may become shorted with power. Check the related

circuits.

7.

CHECK TRACTION MOTOR INVERTER POWER SUPPLY (POWER ON) CIRCUIT

1. Reconnect VCM harness connector.

2. Disconnect traction motor inverter harness connector (F13).

3. Turn power switch ON and erase DTC.

4. Perform confirmation procedure. Refer to 

EVC-231, "DTC Logic"

.

Is DTC “P312A” detected?

YES

>> GO TO 8.

NO

>> Check traction motor inverter power supply (POWER ON) circuit for short to power.

8.

CHECK LBC POWER SUPPLY (POWER ON) CIRCUIT

1. Turn power switch OFF.

2. Reconnect traction motor inverter harness connector.

3. Disconnect LBC harness connector (B24).

4. Turn power switch ON and erase DTC.

5. Perform confirmation procedure. Refer to 

EVC-231, "DTC Logic"

.

Is “P312A” detected?

YES

>> GO TO 9.

NO

>> Check LBC power supply (POWER ON) circuit for short to power.

9.

CHECK PDM (POWER DELIVERY MODULE) POWER SUPPLY (POWER ON) CIRCUIT

1. Turn power switch OFF.

2. Reconnect LBC harness connector.

3. Disconnect PDM (Power Delivery Module) harness connector (F23).

4. Turn power switch ON and erase DTC.

5. Perform confirmation procedure. Refer to 

EVC-231, "DTC Logic"

.

Is DTC “P312A” detected?

YES

>> GO TO 10.

NO

>> Check on board charger power supply (POWER ON) circuit for short to power.

+

−

Voltage

VCM

Connector

Terminal

E62

74

Ground

0 V

+

−

Voltage

VCM

Connector

Terminal

E62

74

Ground

0 V

EVC-234

< DTC/CIRCUIT DIAGNOSIS >

P312A EV SYSTEM CAN COMMUNICATION

10.

CHECK A/C AUTO AMP. POWER SUPPLY (POWER ON) CIRCUIT

1. Turn power switch OFF.

2. Reconnect PDM (Power Delivery Module) harness connector.

3. Disconnect A/C auto amp. harness connector (M55).

4. Turn power switch ON and erase DTC.

5. Perform confirmation procedure. Refer to 

EVC-231, "DTC Logic"

.

Is DTC “P312A” detected?

YES-1 (With TCU)>>GO TO 11.

YES-2 (Without TCU)>>GO TO 12.

NO

>> Check A/C auto amp. power supply (POWER ON) circuit for short to power.

11.

CHECK TCU POWER SUPPLY (POWER ON) CIRCUIT

1. Turn power switch OFF.

2. Reconnect A/C auto amp. harness connector.

3. Disconnect TCU harness connector (M67).

4. Turn power switch ON and erase DTC.

5. Perform confirmation procedure. Refer to 

EVC-231, "DTC Logic"

.

Is DTC “P312A” detected?

YES

>> GO TO 12.

NO

>> Check TCU power supply (POWER ON) circuit for short to power.

12.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

Is DTC “P312A” detected?

YES

>> Replace VCM. Refer to 

EVC-423, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

P312B EV SYSTEM RESTART ERROR

EVC-235

< DTC/CIRCUIT DIAGNOSIS >

D

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EVC

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P312B EV SYSTEM RESTART ERROR

DTC Logic

INFOID:0000000010120689

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. Turn power switch ON and wait at least 10 seconds.

2. Turn OFF the power switch. Between 5 seconds later and within 10 seconds, turn ON the power switch

again. Wait at least 1 minute.

3. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-236, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Turn power switch OFF. 

2. Check that the charging status indicator is not illuminating, 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.

3. Connect EVSE (with AC power input) and wait at least 10 seconds.

4. Turn power switch ON.

5. Disconnect EVSE and wait at least 1 minutes.

6. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-236, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

PERFORM DTC CONFIRMATION PROCEDURE-3

With CONSULT

1. Turn power switch OFF. 

2. Check that the charging status indicator is not illuminating, and wait at least 90 seconds.

CAUTION:

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P312B

RESTART ERROR
(Restart error)

The traction motor inverter and the PDM (Power Delivery 
Module) cannot be activated for 30 seconds or more at a 
restart before the completion of VCM self shut off. 

• Harness or connectors
• Traction motor inverter
• PDM (Power Delivery 

Module)

• VCM

 

 

 

 

 

 

 

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