Nissan Rogue manuals

Nissan Rogue Service Manual: System description

CAN COMMUNICATION SYSTEM

System Description

System Diagram

System Diagram

Each control unit passes an electric current to the termination circuits when transmitting CAN communication signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN communication system transmits and receives CAN communication signals by the potential difference.

Component

Description

Main line CAN communication line between splices
Branch line CAN communication line between splice and a control unit
Splice A point connecting a branch line with a main line
Termination circuit Refer to LAN-9, "CAN Communication Control Circuit".

CAN Communication Control Circuit

Component

System description

CAN controller It controls CAN communication signal transmission and reception, error detection, etc.
Transceiver IC It converts digital signal into CAN communication signal, and CAN communication signal into digital signal.
Noise filter It eliminates noise of CAN communication signal.
Termination circuit* (Resistance of approx. 120 Ω) It produces potential difference.

*: These are the only control units wired with both ends of CAN communication system.

DIAG ON CAN

Description

“Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1 and DDL2 communication lines, between control units and diagnosis unit.

System Diagram

System Diagram

System Diagram

TROUBLE DIAGNOSIS

Condition of Error Detection

DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT if a CAN communication signal is not transmitted or received between units for 2 seconds or more.

CAN COMMUNICATION SYSTEM ERROR

WHEN DTC OF CAN COMMUNICATION IS INDICATED EVEN THOUGH CAN COMMUNICATION SYSTEM IS NORMAL

CAUTION: 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

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:

Example: TCM branch line open circuit

Example: TCM branch line open circuit

Unit name

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 OD 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.

Example: Data link connector branch line open circuit

Example: Data link connector branch line open circuit

Example: Data link connector branch line open circuit

NOTE:

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.

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

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

Unit name

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 wiper 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.

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

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

Unit name

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 ignition 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.
Combination meter 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.

CAN Diagnosis with CONSULT

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

Self-Diagnosis

If communication signals cannot be transmitted or received among units communicating via CAN communication 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 applicable sections.

Self-Diagnosis

CAN Diagnostic Support Monitor

MONITOR ITEM (CONSULT)

Example: CAN DIAG SUPPORT MNTR indication

Example: CAN DIAG SUPPORT MNTR indication

Without PAST

Without PAST

With PAST

With PAST

MONITOR ITEM (ON-BOARD DIAGNOSIS)

NOTE: For some models, CAN communication diagnosis result is received from the vehicle monitor.

Example: Vehicle Display

Example: Vehicle Display

How to Use CAN Communication Signal Chart

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.

How to Use CAN Communication Signal Chart

Precaution
Precautions for trouble diagnosis CAUTION:  Never apply 7.0 V or more to the measurement terminal.  Use a tester with open terminal voltage of 7.0 V or less.  Turn the ignition ...

Basic inspection
DIAGNOSIS AND REPAIR WORKFLOW Trouble Diagnosis Flow Chart Trouble Diagnosis Procedure INTERVIEW WITH CUSTOMER Interview with the customer is important to detect the root cause of CAN commun ...

Other materials:

Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the ...

Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the ...

Charging system preliminary inspection
Diagnosis Procedure 1.CHECK BATTERY TERMINALS CONNECTION Check if battery terminals are clean and tight. Is the inspection result normal? YES >> GO TO 2. NO >> Repair battery terminal connection. Confirm repair by performing complete Charging system test using EXP-800 NI or G ...

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