Infiniti FX35, FX50 (S51). Manual - part 1615

U1010 CONTROL UNIT (CAN)

SCS-45

< DTC/CIRCUIT DIAGNOSIS >

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U1010 CONTROL UNIT (CAN)

Description

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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 detectability. 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 communication with less wir-
ing. Each control unit communicates data but selectively reads required data only.

DTC Logic

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DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform “E-SUS” self-diagnosis.

Is DTC “U1010” detected?

YES 

>> Proceed to diagnosis procedure. Refer to 

SCS-45, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

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1.

CHECK E-SUS CONTROL UNIT

Check E-SUS control unit harness connector for disconnection and deformation.

Is the inspection result normal? 

YES

>> Replace E-SUS control unit. Refer to 

SCS-61, "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 E-SUS control 
unit.

Malfunction of E-SUS control unit

SCS-46

< DTC/CIRCUIT DIAGNOSIS >

MODE SELECT SWITCH (E-SUS MODE SELECT)

MODE SELECT SWITCH (E-SUS MODE SELECT)

Description

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• Mode select switch (E-SUS mode select) can be switched to SPORT mode or AUTO mode manually. 
• When the ignition switch is turned to ON, the mode lamp briefly illuminates, but it is not a malfunction. 

Component Function Check

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1.

CHECK MODE SELECT SWITCH (E-SUS MODE SELECT) OPERATION

Operate the mode select switch (E-SUS mode select) and check that the sport mode indicator lamp in the
combination meter turns ON/OFF correctly.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

SCS-46, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK MODE SELECT SWITCH (E-SUS MODE SELECT)

Check mode select switch (E-SUS mode select). Refer to 

SCS-47, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Mode select switch (E-SUS mode select) is malfunctioning. Replace Mode select switch (E-SUS

mode select).

2.

CHECK MODE SELECT SWITCH (E-SUS MODE SELECT) HARNESS

1.

Disconnect E-SUS control unit harness connector.

2.

Disconnect mode select switch (E-SUS mode select) connector.

3.

Check the continuity between mode select switch (E-SUS mode select) harness connector and E-SUS
control unit harness connector.

4.

Check the continuity between mode select switch (E-SUS mode select) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> If the open or short in harness, repair or replace harness.

3.

CHECK COMBINATION METER

Selection mode

Target driving scene

AUTO mode

Normal driving (basic position)

SPORT mode

Sport-conscious driving

Condition

Sport mode indicator lamp illumination status

Mode select switch (E-SUS mode select): SPORT

ON

Mode select switch (E-SUS mode select): AUTO 

OFF

E-SUS control unit 

Mode select switch (E-SUS 

mode select)

Continuity

Connector

Terminal

Connector

Terminal

B38

20

M179

1

Existed

Mode select switch (E-SUS mode select)

—

Continuity

Connector

Terminal

M179

3

Ground

Existed

MODE SELECT SWITCH (E-SUS MODE SELECT)

SCS-47

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1.

Connect E-SUS control unit harness connector.

2.

Connect mode select switch (E-SUS mode select) harness connector.

3.

Check the indication and operation of combination meter are normal. Refer to 

MWI-43, "Diagnosis

Description"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace combination meter.

Component Inspection

INFOID:0000000005588970

1.

CHECK MODE SELECT SWITCH (E-SUS MODE SELECT)

1.

Turn the ignition switch OFF.

2.

Disconnect mode select switch (E-SUS mode select) harness connector.

3.

Check the continuity between mode select switch (E-SUS mode select) connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace mode select switch (E-SUS mode select).

Mode select switch (E-SUS mode select)

Condition

Continuity

Terminal

1 

−

 3

When mode select switch (E-SUS mode 
select): SPORT

Existed

When mode select switch (E-SUS mode 
select): AUTO

Not existed

SCS-48

< DTC/CIRCUIT DIAGNOSIS >

SPORT MODE INDICATOR LAMP

SPORT MODE INDICATOR LAMP

Description

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The following is the indications of indicator lamp after the engine start.

SPORT MODE INDICATOR LAMP

Component Function Check

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1.

SPORT MODE INDICATOR LAMP OPERATION CHECK

Check that the sport mode indicator lamp in the combination meter turns ON/OFF correctly when operating
the mode select switch (E-SUS mode select).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

SCS-48, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005588973

1.

CHECK MODE SELECT SWITCH (E-SUS MODE SELECT)

Perform the trouble diagnosis for mode select switch (E-SUS mode select). Refer to 

SCS-46, "Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check mode select switch (E-SUS mode select). Refer to 

SCS-47, "Component Inspection"

.

2.

CHECK SELF-DIAGNOSIS

With CONSULT-III

Perform “E-SUS” self-diagnosis.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check items displayed by self-diagnosis.

3.

CHECK COMBINATION METER

Check the indication and operation of combination meter are normal. Refer to 

MWI-43, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace E-SUS control unit. Refer to 

SCS-61, "Exploded View"

.

NO

>> Repair or replace combination meter. Refer to 

MWI-146, "Exploded View"

.

Condition

Sport mode indicator lamp

AUTO mode

OFF

SPORT mode

ON