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Nissan Juke (2016 year). Service Repair Manual - part 459

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TROUBLE DIAGNOSIS

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

CAN communication system is normal if DTC of CAN communication is indicated on SELF-DIAG

RESULTS of CONSULT under the above conditions. Erase the memory of the self-diagnosis of each

unit.

Symptom When Error Occurs in CAN Communication System

INFOID:0000000012200494

In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit

and receive signals if any error occurs on CAN communication line. Under this condition, multiple control units

related to the root cause malfunction or go into fail-safe mode.

ERROR EXAMPLE

NOTE:

Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.

Example: Main Line Between Data Link Connector and ABS Actuator and Electric Unit (Control Unit) Open Circuit

JSMIA0442GB

Unit name

Major symptom

ECM

Engine torque limiting is affected, and shift harshness increases.

BCM

• Reverse warning chime does not sound.
• The front wiper moves under continuous operation mode even though the front wip-

er switch being in the intermittent position.

EPS control unit

The steering effort increases.

Combination meter

• The shift position indicator and OD OFF indicator turn OFF.
• The speedometer is inoperative.
• The odo/trip meter stops.

ABS actuator and electric unit (control unit)

Normal operation.

TCM

No impact on operation.

IPDM E/R

When the ignition switch is ON,
• The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.

Revision: November 2015

2016 JUKE

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSIS

Example: TCM Branch Line Open Circuit

NOTE:

The model (all units on CAN communication system are Diag on CAN) cannot perform CAN diagnosis with

CONSULT if the following error occurs. The error is judged by the symptom.

Example: Data Link Connector Branch Line Open Circuit

JSMIA0443GB

Unit name

Major symptom

ECM

Engine torque limiting is affected, and shift harshness increases.

BCM

Reverse warning chime does not sound.

EPS control unit

Normal operation.

Combination meter

• Shift position indicator and O/D OFF indicator turn OFF.
• Warning lamps turn ON.

ABS actuator and electric unit (control unit)

Normal operation.

TCM

No impact on operation.

IPDM E/R

Normal operation.

Error

Difference of symptom

Data link connector branch line open circuit

Normal operation.

CAN-H, CAN-L harness short-circuit

Most of the units which are connected to the CAN communication
system enter fail-safe mode or are deactivated.

JSMIA0444GB

Revision: November 2015

2016 JUKE

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TROUBLE DIAGNOSIS

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

NOTE:

When data link connector branch line is open, transmission and reception of CAN communication signals are

not affected. Therefore, no symptoms occur. However, be sure to repair malfunctioning circuit.

Example: CAN-H, CAN-L Harness Short Circuit

CAN Diagnosis with CONSULT

INFOID:0000000012200495

CAN diagnosis on CONSULT extracts the root cause by receiving the following information.

Unit name

Major symptom

ECM

Normal operation.

BCM

EPS control unit

Combination meter

ABS actuator and electric unit (control unit)

TCM

IPDM E/R

JSMIA0445GB

Unit name

Major symptom

ECM

• Engine torque limiting is affected, and shift harshness increases.
• Engine speed drops.

BCM

• Reverse warning chime does not sound.
• The front wiper moves under continuous operation mode even though the front

wiper switch being in the intermittent position.

• The room lamp does not turn ON.
• The engine does not start (if an error or malfunction occurs while turning the igni-

tion switch OFF.)

• The steering lock does not release (if an error or malfunction occurs while turning

the ignition switch OFF.)

EPS control unit

The steering effort increases.

Combination meter

• The tachometer and the speedometer do not move.
• Warning lamps turn ON.
• Indicator lamps do not turn ON.

ABS actuator and electric unit (control unit)

Normal operation.

TCM

No impact on operation.

IPDM E/R

When the ignition switch is ON,
• The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.

Revision: November 2015

2016 JUKE

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSIS

• Response to the system call

• Control unit diagnosis information

• Self-diagnosis

• CAN diagnostic support monitor

Self-Diagnosis

INFOID:0000000012200496

If communication signals cannot be transmitted or received among units communicating via CAN communica-

tion line, CAN communication-related DTC is displayed on the CONSULT “Self Diagnostic Result” screen.

NOTE:

The following table shows examples of CAN communication-related DTC. For other DTC, refer to the applica-

ble sections.

CAN Diagnostic Support Monitor

INFOID:0000000012200497

MONITOR ITEM (CONSULT)

Example: CAN DIAG SUPPORT MNTR indication

Without PAST

DTC

Self-diagnosis item

(CONSULT indication)

DTC detection condition

Inspection/Action

U1000

CAN COMM CIRCUIT

ECM

When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-relat-
ed diagnosis) for 2 seconds or more.

Start the inspection. Re-
fer to the applicable sec-
tion of the indicated
control unit.

Except
for ECM

When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.

U1001

CAN COMM CIRCUIT

When ECM is not transmitting or receiving CAN communi-
cation signal other than OBD (emission-related diagnosis)
for 2 seconds or more.

U1002

SYSTEM COMM

When a control unit is not transmitting or receiving CAN
communication signal for 2 seconds or less.

U1010

CONTROL UNIT(CAN)

When an error is detected during the initial diagnosis for
CAN controller of each control unit.

Replace the control unit
indicating “U1010”.

JSMIA0964GB

Item

PRESENT

Description

Initial diagnosis

Normal at present

Control unit error (Except for some control units)

Revision: November 2015

2016 JUKE

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TROUBLE DIAGNOSIS

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

With PAST

Transmission diagnosis

Normal at present

UNKWN

Unable to transmit signals for 2 seconds or more.

Diagnosis not performed

Control unit name

(Reception diagnosis)

Normal at present

UNKWN

Unable to receive signals for 2 seconds or more.

Diagnosis not performed

No control unit for receiving signals. (No applicable optional parts)

Item

PRESENT

Description

Item

PRESENT

PAST

Description

Transmission diagnosis

Normal at present and in the past

1 – 39

Normal at present, but unable to transmit signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)

UNKWN

Unable to transmit signals for 2 seconds or more at present.

Control unit name

(Reception diagnosis)

Normal at present and in the past

1 – 39

Normal at present, but unable to receive signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)

UNKWN

Unable to receive signals for 2 seconds or more at present.

Not diagnosed

–

Diagnosis not performed.

No control unit for receiving signals. (No applicable optional parts)

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2016 JUKE

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< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSIS

How to Use CAN Communication Signal Chart

INFOID:0000000012200498

The CAN communication signal chart lists the signals needed for trouble diagnosis. It is useful for detecting

the root cause by finding a signal related to the symptom, and by checking transmission and reception unit.

JSMIA0446GB

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2016 JUKE

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DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

[CAN FUNDAMENTAL]

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Trouble Diagnosis Flow Chart

INFOID:0000000012200499

DESCRIPTION

DETAIL OF TROUBLE DIAGNOSIS FLOW CHART

INTERVIEW WITH CUSTOMER

Interview with the customer is important to detect the root cause of CAN communication system errors and to

understand vehicle condition and symptoms for proper trouble diagnosis.

Points in interview

• What: Parts name, system name

• When: Date, Frequency

• Where: Road condition, Place

• In what condition: Driving condition/environment

• Result: Symptom

Notes for checking error symptoms:

• Check normal units as well as error symptoms.

- Example: Circuit between ECM and the combination meter is judged normal if the customer indicates

tachometer functions normally.

JSMIA0528GB

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2016 JUKE

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< BASIC INSPECTION >

[CAN FUNDAMENTAL]

DIAGNOSIS AND REPAIR WORKFLOW

• When a CAN communication system error is present, multiple control units may malfunction or go into fail-

safe mode.

• Indication of the combination meter is important to detect the root cause because it is the most obvious to

the customer, and it performs CAN communication with many units.

>> GO TO 2.

INSPECTION OF VEHICLE CONDITION

Check whether the symptom is reproduced or not.

NOTE:

Do not turn the ignition switch OFF or disconnect the 12V battery cable while reproducing the error. The error

may temporarily correct itself, making it difficult to determine the root cause.

>> GO TO 3.

CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART)

Determine CAN system type based on vehicle equipment.

NOTE:

• This chart is used if CONSULT does not automatically recognize CAN system type.

• There are two styles for CAN system type specification charts. Depending on the number of available sys-

tem types, either style A or style B may be used.

• CAN System Type Specification Chart (Style A)

NOTE:

SKIB8717E

Revision: November 2015

2016 JUKE

Content .. 457 458 459 460 ..