Nissan Juke Service and Repair Manual : Trouble diagnosis
System Diagram
Condition of Error Detection
DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT-III 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
:
CAN communication system is normal if DTC of CAN communication is indicated on
SELF-DIAG
RESULTS of CONSULT-III 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
:
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
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-III if the following error occurs. The error is judged by the symptom.
Example: Data Link Connector Branch Line Open Circuit
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-III
CAN diagnosis on CONSULT-III extracts the root cause by receiving the following information.
• Response to the system call
• Control unit diagnosis information
• Self-diagnosis
• CAN diagnostic support monitor
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-III “Self Diagnostic Result” screen.
NOTE
:
The following table shows examples of CAN communication-related DTC. For other
DTC, refer to the applicable
sections.
Can Diagnostic Support Monitor
MONITOR ITEM (CONSULT-III)
Example: CAN DIAG SUPPORT MNTR indication
Without PAST
With PAST
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.
System
Can communication system CAN COMMUNICATION SYSTEM : System Description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex commun ...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 communic ...Other materials:
ECU diagnosis information
4WD control module
Reference Value
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
*: The values are changed by throttle opening and engine speed.
CAUTION:
When using circuit tester to measure voltage for inspection, be sure not to
extend forcibly any connector
t ...
Precautions for Harness Repair
• Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
• Bypass connection is never allowed at the repaired area.
NOTE:
Bypass connection may cause CAN communication error. The
spliced wire becomes separated and t ...
P1805 brake switch
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-374, "Dia ...