Nissan Leaf. Manual - part 537

EVC-172

< DTC/CIRCUIT DIAGNOSIS >

P0AA4 SYSTEM MAIN RELAY -

 

 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.

4.

CHECK ELECTRIC COMPRESSOR

1. Disconnect electric compressor high voltage harness connector.

2. Check the short circuit between electric compressor terminals.

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace electric compressor. And then, GO TO 9. Refer to 

HA-37, "Removal and Installation"

(With heat pump system) or 

HA-95, "Removal and Installation"

 (Without heat pump system).

5.

CHECK PTC HEATER

1. Disconnect Li-ion battery harness connector (H19).

2. Check the short circuit between Li-ion battery terminals.

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace PTC heater. And then, GO TO 9. Refer to 

HAC-198, "Removal and Installation"

 [(Auto A/

C (with heat pump)] or

HAC-359, "Removal and Installation"

 [(Auto A/C (without heat pump)].

6.

CHECK HIGH VOLTAGE HARNESS-1

Standard

: 5 V or less 

Electric compressor

Resistance

+

−

Terminal

1

2

3  k

Ω or more

Electric compressor

Resistance

+

−

Terminal

1

3

3  k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

−

Terminal

PTC heater

H19

40

41

3 k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

−

Terminal

PTC heater

H19

40

41

3 k

Ω or more

P0AA4 SYSTEM MAIN RELAY -

EVC-173

< DTC/CIRCUIT DIAGNOSIS >

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1. Disconnect Li-ion battery harness connector (H3).

2. Check the short circuit between Li-ion battery harness connector terminals.

With heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> The high voltage harness within Li-ion battery may be shorted. Check the related circuits. And

then, GO TO 9.

NO

>> GO TO 7.

7.

CHECK TRACTION MOTOR INVERTER

1. Remove PDM (Power Delivery Module). Refer to 

VC-112, "Removal and Installation"

.

2. Check the short circuit between traction motor inverter termi-

nals.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace traction motor inverter. And then, GO TO 9. Refer to 

TMS-103, "Removal and Installa-

tion"

.

8.

CHECK HIGH VOLTAGE HARNESS-2

1. Remove high voltage harness from PDM (Power Delivery Module). Refer to 

VC-112, "Removal and Instal-

lation"

.

2. Check the short circuit between high voltage harness connector (Li-ion battery side) and high voltage har-

ness connector [PDM (Power Delivery Module) side].

With heat pump system

Connected to:

Li-ion battery

Resistance

Connector

+

−

Terminal

PDM (Power Delivery 

Module)

H3

37

38

3 k

Ω or more

Connected to:

Li-ion battery

Resistance

Connector

+

−

Terminal

PDM (Power Delivery 

Module)

H3

37

38

3 k

Ω or more

Resistance

: more than 3 k

Ω

JSCIA0696ZZ

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

−

Terminal

Li-ion battery

H5

38

39

3 k

Ω or more

EVC-174

< DTC/CIRCUIT DIAGNOSIS >

P0AA4 SYSTEM MAIN RELAY -

Without heat pump system

3. Check the short circuit between high voltage harness connector (electric compressor side) and high volt-

age harness connector [PDM (Power Delivery Module) side].

with heat pump system

Without heat pump system

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace malfunctioning harness. And then, GO TO 9.

9.

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

Li-ion battery

H18

38

39

3 k

Ω or more

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

−

Terminal

Electric compressor

H22

42

41

3 k

Ω or more

Connected to:

PDM (Power Delivery Module)

Resistance

Connector

+

−

Terminal

Electric compressor

H7

41

42

3 k

Ω or more

P0AA5 SYSTEM MAIN RELAY -

EVC-175

< DTC/CIRCUIT DIAGNOSIS >

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P0AA5 SYSTEM MAIN RELAY -

DTC Logic

INFOID:0000000010120631

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 wait at least 10 seconds.

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

YES

>> Proceed to 

EVC-175, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120632

1.

CHECK SYSTEM MAIN RELAY GROUND CIRCUIT

1. Turn power switch OFF.

2. Disconnect Li-ion battery harness connector.

3. Check the continuity between Li-ion battery harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK SYSTEM MAIN RELAY CIRCUIT

Check continuity between Li-ion battery connector terminals.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0AA5

HYBRID BATT NEGATIVE 
CONTACTOR
(Hybrid battery negative 
contactor circuit stuck 
open)

VCM detects a break in the drive circuit of the sys-
tem main relay or an extremely high resistance for 
2.5 seconds or more when the F/S relay is ON 
with the system main relay OFF.

• Harness or connectors
• Battery J/B

+

−

Continuity

Li-ion battery

Connector

terminal

B89

13

Ground

Existed

Li-ion battery

Continuity

terminals

13

14

Existed