Nissan Pathfinder. Manual — part 402

DLN-50

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C1205 4WD ACTUATOR RELAY

C1205 4WD ACTUATOR RELAY

DTC Logic

INFOID:0000000009177738

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and

wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

With CONSULT

1. Turn the ignition switch OFF to ON.

2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1205” detected?

YES

>> Proceed to

DLN-50, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177739

1.

CHECK 4WD SOLENOID CIRCUIT (1)

1. Turn the ignition switch OFF.

2. Disconnect 4WD control unit harness connector.

3. Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES >> GO TO 4.

NO

>> GO TO 2.

2.

CHECK 4WD SOLENOID

1. Disconnect 4WD solenoid harness connector.

2. Check the continuity between 4WD solenoid connector and the ground.

Is the inspection result normal?

YES

>> GO TO 3.

DTC

Display item

Malfunction detected condition

Possible cause

C1205

4WD ACTUATOR RLY

Malfunction has been detected from
4WD actuator relay integrated with 4WD
control unit, or malfunction related to
4WD solenoid has been detected.

• Internal malfunction of 4WD control

unit

• Malfunction of 4WD solenoid power

supply circuit (ground short)

4WD control unit

—

Continuity

Connector

Terminal

B67

1

Ground

Not existed

2

4WD solenoid

—

Continuity

Terminal

1

Ground

Not existed

2

C1205 4WD ACTUATOR RELAY

DLN-51

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

NO

>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to

DLN-121,

"Removal and Installation"

.

3.

CHECK 4WD SOLENOID CIRCUIT

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK TERMINALS AND HARNESS CONNECTORS

1. Check 4WD control unit pin terminals for damage or loose connection with harness connector.

2. Check 4WD solenoid pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> After connecting each harness connector, perform DTC confirmation procedure again. When DTC

“C1205” is detected, replace 4WD control unit. Refer to

DLN-72, "Removal and Installation"

.

NO

>> Repair or replace damaged parts.

4WD control unit

—

Continuity

Connector

Terminal

B67

1

Ground

Not existed

2

DLN-52

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C1209 MODE SW

C1209 MODE SW

DTC Logic

INFOID:0000000009177740

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1. Turn the ignition switch OFF to ON.

2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1209” detected?

YES

>> Proceed to diagnosis procedure. Refer to

DLN-52, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177741

1.

CHECK 4WD SHIFT SWITCH

1. Turn the ignition switch OFF.

2. Remove 4WD shift switch.

3. Check the continuity between 4WD shift switch connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace 4WD shift switch. Refer to

DLN-73, "Removal and Installation"

.

2.

CHECK 4WD SHIFT SWITCH CIRCUIT (1)

Check the continuity between 4WD shift switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK 4WD SHIFT SWITCH CIRCUIT (2)

1. Disconnect 4WD control unit harness connector.

DTC

Items

(CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

C1209

MODE SW

More than two switch inputs are simulta-
neously detected due to short circuit of
4WD shift switch.

Malfunction of 4WD shift switch or 4WD
shift switch circuit.

4WD shift switch

Continuity

Connector

Terminal

Condition

M212

2

3

4WD shift switch: 2WD

Existed

Except the above

Not existed

2

6

4WD shift switch: AUTO

Existed

Except the above

Not existed

2

8

4WD shift switch: 4WD

Existed

Except the above

Not existed

4WD shift switch

Ground

Continuity

Connector

Terminal

M212

2

Ground

Existed

C1209 MODE SW

DLN-53

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

2. Check the continuity between 4WD control unit harness connector and 4WD shift switch harness connec-

tor.

3. Check the continuity between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK 4WD CONTROL UNIT OUTPUT SIGNAL

1. Connect 4WD control unit harness connector.

2. Turn the ignition switch ON.

3. Check the voltage between 4WD shift switch harness connector and ground.

Is the inspection result normal?

YES

>> Check each harness connector pin terminal for disconnection.

NO

>> Replace 4WD control unit. Refer to

DLN-72, "Removal and Installation"

.

Component Inspection

INFOID:0000000009177742

1.

CHECK 4WD SHIFT SWITCH

1. Turn the ignition switch OFF.

2. Remove 4WD shift switch.

3. Check the continuity between 4WD shift switch connector terminals.

4WD control unit

4WD shift switch

Continuity

Connector

Terminal

Connector

Terminal

B67

5

M212

3

Not existed

5

6

Existed

5

8

Not existed

12

3

Existed

12

6

Not existed

12

8

Not existed

14

3

Not existed

14

6

Not existed

14

8

Existed

4WD control unit

Ground

Continuity

Connector

Terminal

B67

5

Ground

Not existed

12

14

4WD shift switch

Ground

Voltage (Approx.)

Connector

Terminal

M212

3

Ground

Battery voltage

6

8

4WD shift switch

Continuity

Terminal

Condition

2

3

4WD shift switch: 2WD

Existed

Except the above

Not existed