Nissan Leaf. Manual - part 926

 

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Nissan Leaf. Manual - part 926

 

 

LAN-166

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

HVAC BRANCH LINE CIRCUIT

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415423

1.

CHECK CONNECTOR

1. Turn the power switch OFF.

2. Disconnect the 12V battery cable from the negative terminal. Refer to 

LAN-26, "Precautions for Removing

Battery Terminal"

.

3. Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit

side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/C auto amp.

2. Check the resistance between the A/C auto amp. harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the A/C auto amp. branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.

• Auto A/C (With heat pump): 

HAC-173, "A/C AUTO AMP. : Diagnosis Procedure"

• Auto A/C (Without heat pump): 

HAC-333, "A/C AUTO AMP. : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the A/C auto amp. Refer to the following.

• Auto A/C (With heat pump): 

HAC-187, "Removal and Installation"

• Auto A/C (Without heat pump): 

HAC-347, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.

NO

>> Repair the power supply and the ground circuit.

A/C auto amp. harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M55

28

29

Approx. 54 – 66

LAN

HV BAT BRANCH LINE CIRCUIT

LAN-167

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

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HV BAT BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000010415425

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.

• The removed service plug must always be carried in a pocket of the responsible worker or placed in

the tool box during the procedure to prevent the plug from being connected by mistake.

• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses

before beginning work on the high voltage system.

• Never allow workers other than the responsible person to touch the vehicle containing high voltage

parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-

lating sheet except when using them.

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.

1.

CHECK CONNECTOR

1. Turn the power switch OFF.

2. Disconnect the 12V battery cable from the negative terminal. Refer to 

LAN-26, "Precautions for Removing

Battery Terminal"

.

3. Check the terminals and connectors of the Li-ion battery for damage, bend and loose connection (unit

side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of Li-ion battery.

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

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the Li-ion battery branch line.

3.

PRECONDITIONING

WARNING:

Disconnect the 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"

.

Li-ion battery harness connector

Resistance (

Ω)

Connector No.

Terminal No.

B24

1

2

Approx. 108 – 132

LAN-168

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

HV BAT BRANCH LINE CIRCUIT

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 4.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the Li-ion battery controller. Refer to 

EVB-176, "Diagnosis

Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the power supply and the ground circuit.

5.

CHECK HARNESS FOR OPEN CIRCUIT

1. Remove Li-ion battery controller. Refer to 

EVB-201, "LI-ION BATTERY CONTROLLER : Removal and

Installation"

.

2. Check the continuity between vehicle communication harness (harness between Li-ion battery harness

connector side and Li-ion battery controller side) connector terminals. Refer to 

EVB-27, "Circuit Diagram"

.

Is the measurement value within the specification?

YES (Present error)>>Replace the Li-ion battery controller. Refer to 

EVB-201, "LI-ION BATTERY CON-

TROLLER : Removal and Installation"

.

YES (Past error)>>Error was detected in the Li-ion battery controller branch line.

NO

>> Repair the vehicle communication harness.

Standard

: 5 V or less 

JPCIA0296ZZ

Vehicle communication harness

Continuity

Li-ion battery harness connector side (LB1)

Li-ion battery controller side (LB11)

Terminal No.

Terminal No.

1

1

Existed

2

13

Existed

LAN

CAN COMMUNICATION CIRCUIT

LAN-169

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

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CAN COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000010415426

1.

CONNECTOR INSPECTION

1. Turn the power switch OFF.

2. Disconnect the 12V battery cable from the negative terminal. Refer to 

LAN-26, "Precautions for Removing

Battery Terminal"

.

3. Disconnect all the control unit connectors on CAN communication circuit.

4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check the harness and repair the root cause.

3.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector and the ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check the harness and repair the root cause.

4.

CHECK VCM AND BCM TERMINATION CIRCUIT

1. Remove the VCM and the BCM.

2. Check the resistance between the VCM terminals.

3. Check the resistance between the BCM terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

NO

>> Replace the VCM and/or the BCM.

5.

CHECK SYMPTOM

Data link connector

Continuity

Connector No.

Terminal No.

M4

6

14

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M4

6

Not existed

14

Not existed

VCM

Resistance (

Ω)

Terminal No.

75

76

Approx. 108 – 132

BCM

Resistance (

Ω)

Terminal No.

39

40

Approx. 108 – 132

 

 

 

 

 

 

 

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