Infiniti FX35, FX50 (S51). Manual - part 547

 

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Infiniti FX35, FX50 (S51). Manual - part 547

 

 

P1826 TRANSFER FLUID TEMPERATURE

DLN-23

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ETX13C]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK TRANSFER FLUID TEMPERATURE SENSOR

Check the resistance between transfer fluid temperature sensor harness connector terminals. Refer to 

DLN-

24, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace transfer fluid temperature sensor. Refer to 

DLN-88, "VQ35HR : Exploded View"

(VQ35HR), 

DLN-92, "VK50VE : Exploded View"

 (VK50VE).

3.

CHECK TRANSFER FLUID TEMPERATURE SENSOR SIGNAL (2)

Check the voltage between AWD solenoid harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK AWD CONTROL UNIT GROUND

1.

Turn the ignition switch OFF.

2.

Disconnect AWD control unit harness connector.

3.

Check the continuity between AWD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK TRANSFER FLUID TEMPERATURE SENSOR CIRCUIT 

1.

Turn the ignition switch OFF.

2.

Disconnect AWD control unit harness connector.

3.

Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.

4.

Check the continuity between AWD control unit harness connector and the ground.

AWD solenoid

Voltage

(Approx.)

Connector

Terminal

F57

6

7

2.5 V

AWD solenoid

Voltage

(Approx.)

Connector

Terminal

F57

6

Ground

2.5 V

AWD control unit

Continuity

Connector

Terminal

M105

10

Ground

Existed

11

AWD control unit

AWD solenoid

Continuity

Connector

Terminal

Connector

Terminal

M105

13

F57

6

Existed

3

7

DLN-24

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ETX13C]

P1826 TRANSFER FLUID TEMPERATURE

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK TERMINALS AND HARNESS CONNECTORS

1.

Check AWD control unit pin terminals for damage or loose connection with harness connector.

2.

Check transfer fluid temperature sensor pin terminals for damage or loose connection with harness con-
nector.

Is the inspection result normal?

YES

>> Replace AWD control unit. Refer to 

DLN-58, "Exploded View"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000005249063

1.

CHECK TRANSFER FLUID TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect AWD solenoid harness connector.

3.

Check resistance between AWD solenoid connector terminals.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Transfer fluid temperature sensor is malfunctioning. Replace electric controlled coupling. Refer to

DLN-88, "VQ35HR : Exploded View"

 (VQ35HR), 

DLN-92, "VK50VE : Exploded View"

 (VK50VE).

AWD control unit

Continuity

Connector

Terminal

M105

13

Ground

Not existed

3

AWD solenoid

Condition

Resistance 

(Approx.)

Terminal

6

7

20

°

C (68

°

F)

2.5 k

80

°

C (176

°

F)

0.3 k

U1000 CAN COMM CIRCUIT

DLN-25

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ETX13C]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005249064

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicate data but selectively reads required data only.

DTC Logic

INFOID:0000000005249065

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “U1000” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-25, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249066

1.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “U1000” detected?

YES

>> CAN specification chart. Refer to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END

DTC

Display item

Malfunction detected condition

Possible cause

U1000

CAN COMM CIRCUIT

AWD control unit is not transmitting/re-
ceiving CAN communication signal for 2 
seconds or more.

• CAN communication error
• Malfunction of AWD control unit

DLN-26

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ETX13C]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000005249067

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicate data but selectively reads required data only.

DTC Logic

INFOID:0000000005249068

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “U1010” detected?

YES 

>> Proceed to diagnosis procedure. Refer to 

DLN-26, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249069

1.

CHECK AWD CONTROL UNIT

Check AWD control unit harness connector for disconnection and deformation.

Is the inspection result normal? 

YES

>> Replace AWD control unit. Refer to 

DLN-58, "Exploded View"

.

NO

>> Repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

U1010

CONTROL UNIT (CAN)

Detecting error during the initial diagno-
sis of CAN controller of AWD control 
unit.

Malfunction of AWD control unit

 

 

 

 

 

 

 

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