Nissan Juke F15. Instruction — part 918
LAN
SYSTEM
LAN-9
< SYSTEM DESCRIPTION >
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Name
Harness
Description
DDL1
Tx
Rx
For communications with the diagnostic tool. (CAN-H and CAN-L are used for control-
ling)
DDL2
K-LINE
For communications with the diagnostic tool. (CAN-H and CAN-L are used for control-
ling)
Diag on CAN
CAN-H
CAN-L
For communications with the diagnostic tool. (CAN-H and CAN-L are also used for con-
trol and diagnoses.)
LAN-10
< SYSTEM DESCRIPTION >
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
System Diagram
INFOID:0000000012200492
Condition of Error Detection
INFOID:0000000012200493
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
• CAN communication line open (CAN-H, CAN-L, or both)
• CAN communication line short (ground, between CAN communication lines, other harnesses)
• Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN DTC OF CAN COMMUNICATION IS INDICATED EVEN THOUGH CAN COMMUNICATION
SYSTEM IS NORMAL
• Removal/installation of parts: Error may be detected when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)
• Fuse blown out (removed): CAN communication of the unit may cease.
• Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).
• Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).
• Error may be detected if reprogramming is not completed normally.
CAUTION:
SKIB8887E
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
Circuit connected across the CAN communication system. (Resistor)
LAN
TROUBLE DIAGNOSIS
LAN-11
< SYSTEM DESCRIPTION >
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
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.
LAN-12
< 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
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