Nissan Frontier D40. Manual - part 820

LAN

4WD BRANCH LINE CIRCUIT

LAN-67

< COMPONENT DIAGNOSIS >

[CAN]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

4WD BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005272399

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the transfer control unit 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 transfer control unit.

2.

Check the resistance between the transfer control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the transfer control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the transfer control unit. Refer to 

DLN-21, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES (Present error)>>Replace the transfer control unit. Refer to 

DLN-94, "Removal and Installation"

.

YES (Past error)>>Error was detected in the transfer control unit branch line.
NO

>> Repair the power supply and the ground circuit.

Transfer control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M152

1

2

Approx. 54 – 66

LAN-68

< COMPONENT DIAGNOSIS >

[CAN]

BCM BRANCH LINE CIRCUIT

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005272400

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the BCM 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 BCM.

2.

Check the resistance between the BCM harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the BCM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the BCM. Refer to 

BCS-29, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the BCM. Refer to 

BCS-54, "Removal and Installation"

.

YES (Past error)>>Error was detected in the BCM branch line.
NO

>> Repair the power supply and the ground circuit.

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M18

39

40

Approx. 54 – 66

LAN

DIFF BRANCH LINE CIRCUIT

LAN-69

< COMPONENT DIAGNOSIS >

[CAN]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

DIFF BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005272401

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the differential lock control unit for damage, bend and loose con-
nection (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 differential lock control unit.

2.

Check the resistance between the differential lock control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the differential lock control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the differential lock control unit. Refer to 

DLN-275, "Diagno-

sis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the differential lock control unit. Refer to 

DLN-310, "Removal and Installa-

tion"

.

YES (Past error)>>Error was detected in the differential lock control unit branch line.
NO

>> Repair the power supply and the ground circuit.

Differential lock control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M70

5

4

Approx. 54 – 66

LAN-70

< COMPONENT DIAGNOSIS >

[CAN]

DLC BRANCH LINE CIRCUIT

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005272402

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Is the measurement value within the specification?

YES (Present error)>>Check the following items again.

• Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU

list” included)].

• Procedure for detecting root cause.

YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO

>> Repair the data link connector branch line.

Data link connector

Resistance (

Ω

)

Connector No.

Terminal No.

M22

6

14

Approx. 54 – 66