Lan System: Other Nissan Maxima A35

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

1. CAN communication line open (CAN-H, CAN-L, or both)
2. CAN communication line short (ground, between CAN communication lines, other harnesses)
3. Error of CAN communication control circuit of the unit connected to CAN communication line

ERROR EXAMPLE

Note. Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring. Refer to " ABBREVIATION LIST " for the unit abbreviation.

Example: TCM branch line open circuit

Scheme 11

TCM BRANCH LINE OPEN CIRCUIT SYMPTOM CHART

Example: Data link connector branch line open circuit

Scheme 12

DATA LINK CONNECTOR BRANCH LINE OPEN CIRCUIT SYMPTOM CHART

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. 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.

SYMPTOM CHART

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

Scheme 13

SYMPTOM CHART

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

Scheme 14

DTC CHART

MONITOR ITEM (CONSULT-III)

Example: CAN DIAG SUPPORT MNTR indication

Scheme 15

Without PAST

CAN DIAGNOSTIC SUPPORT MONITOR ITEM DESCRIPTION - WITHOUT PAST

With PAST

CAN DIAGNOSTIC SUPPORT MONITOR ITEM DESCRIPTION - 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.

Scheme 16

Scheme 17

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

1. What: Parts name, system name
2. When: Date, Frequency
3. Where: Road condition, Place
4. In what condition: Driving condition/environment
5. Result: Symptom

Note. 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. 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.

CREATE INTERVIEW SHEET

Fill out the symptom described by the customer, vehicle condition, and CAN system type on the interview sheet.

Interview Sheet (Example)

Scheme 18

DETECT THE ROOT CAUSE

CAN diagnosis function of CONSULT-III detects the root cause.

Caution

1. This information describes information peculiar to a vehicle and inspection procedures.
2. For trouble diagnosis procedure, refer to " «TROUBLE DIAGNOSIS PROCEDURE»(ref-388043-S40428891622011022800000) ".

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 driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS AIRBAG -- MAXIMA " and SEAT BELTS -- MAXIMA "articles.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

Precautions Necessary for Steering Wheel Rotation after Battery Disconnect (Early Production, With Electronic Steering Column Lock)

Note. Before removing and installing any control units, first turn the push-button ignition switch to the LOCK position, then disconnect both battery cables. After finishing work, confirm that all control unit connectors are connected properly, then re-connect both battery cables. Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work. If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

This vehicle is equipped with a push-button ignition switch and a steering lock unit.

If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.

If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure below before starting the repair operation.

CAN Communication Signal Chart

Refer to " HOW TO USE CAN COMMUNICATION SIGNAL CHART " for how to use CAN communication signal chart.

Note. Refer to " ABBREVIATION LIST " for the abbreviations of the connecting units.

Scheme 19

Scheme 20

Note. CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Main Line

MALFUNCTION AREA CHART - MAIN LINE

Branch Line

MALFUNCTION AREA CHART - BRANCH LINE

Short Circuit

MALFUNCTION AREA CHART - SHORT CIRCUIT