Information
- This article describes information specific to a vehicle and inspection procedures.
- For trouble diagnosis procedure, refer to " «TROUBLE DIAGNOSIS FLOW CHART»(ref-672614-S15940825482014112400000) " of "CAN FUNDAMENTAL".
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. Information necessary to service the system safely is included in the " SRS AIRBAG " and " SEAT BELTS " articles of this Service Information.
| WARNING | Always observe the following items to prevent accidental activation. To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see " SRS AIRBAG ". Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Information. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. The vehicle may be equipped with a passenger air bag deactivation switch which can be operated by the customer. When the passenger air bag is switched OFF, the passenger air bag is disabled and will not inflate. When the passenger air bag is switched ON, the passenger air bag is enabled and could inflate for certain types of collision. After SRS maintenance or repair, make sure the passenger air bag deactivation switch is in the same position (ON or OFF) as when the vehicle arrived for service. |
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
| WARNING | Always observe the following items for preventing accidental activation. When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. |
Scheme 29
Scheme 29: Precautions for Removing Battery Terminal
- When removing the 12V battery terminal, turn OFF the ignition switch and wait at least 30 seconds. NOTE: ECU may be active for several tens of seconds after the ignition switch is turned OFF. If the battery terminal is removed before ECU stops, then a DTC detection error or ECU data corruption may occur.
- For vehicles with 2 batteries, be sure to connect the main battery and the sub battery before turning ON the ignition switch. NOTE: If the ignition switch is turned ON with any one of the terminals of main battery and sub battery disconnected, then DTC may be detected.
- After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC. NOTE: The removal of 12V battery may cause a DTC detection error.
CAN COMMUNICATION SYSTEM: CAN Communication Control Circuit
CAN communication control circuit is incorporated into the control unit and transmits/receives CAN communication signals.
Scheme 30
Scheme 30: CAN COMMUNICATION SYSTEM: 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 (1) (Resistance of approx. 120 ohms) | Generates a potential difference between CAN-H and CAN-L. |
| (1) These are the only control units wired with both ends of CAN communication system. |
| (1) | These are the only control units wired with both ends of CAN communication system. |
CAN COMMUNICATION SYSTEM: 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 31
Scheme 31: CAN COMMUNICATION SYSTEM: CAN Communication Signal Chart
Scheme 32
Scheme 33
Note. CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
Scheme 34
Scheme 34: Wiring Diagram
Scheme 35
Scheme 36
Scheme 36: CAN System Connector End Views
Scheme 37
Scheme 38
Scheme 39
Scheme 40
Scheme 41
Scheme 42
Interview Sheet
Note. Refer to " TROUBLE DIAGNOSIS PROCEDURE " for how to use interview sheet.
Scheme 43
Scheme 43: Interview Sheet
MAIN LINE
| Malfunction area | Reference |
|---|
| Main line between power steering control module and ABS actuator and electric unit (control unit) | " DIAGNOSIS PROCEDURE " |
| Main line between ABS actuator and electric unit (control unit) and data link connector | " DIAGNOSIS PROCEDURE " |
| Main line between data link connector and air bag diagnosis sensor unit | " DIAGNOSIS PROCEDURE " |
| Main line between air bag diagnosis sensor unit and sliding door control unit RH | " DIAGNOSIS PROCEDURE " |
| Main line between sliding door control unit RH and sliding door control unit LH | " DIAGNOSIS PROCEDURE " |
| Main line between sliding door control unit RH and driver seat control unit | " DIAGNOSIS PROCEDURE " |
| Main line between driver seat control unit and sliding door control unit LH | " DIAGNOSIS PROCEDURE " |
BRANCH LINE
| Malfunction area | Reference |
|---|
| ECM branch line circuit | " DIAGNOSIS PROCEDURE " |
| Power steering control module branch line circuit | " DIAGNOSIS PROCEDURE " |
| ABS actuator and electric unit (control unit) branch line circuit | " DIAGNOSIS PROCEDURE " |
| TCM branch line circuit | " DIAGNOSIS PROCEDURE " |
| BCM branch line circuit | " DIAGNOSIS PROCEDURE " |
| Data link connector branch line circuit | " DIAGNOSIS PROCEDURE " |
| Combination meter branch line circuit | " DIAGNOSIS PROCEDURE " |
| Steering angle sensor branch line circuit | " DIAGNOSIS PROCEDURE " |
| Air bag diagnosis sensor unit branch line circuit | " DIAGNOSIS PROCEDURE " |
| AV control unit branch line circuit | " DIAGNOSIS PROCEDURE " |
| Around view monitor control unit | " DIAGNOSIS PROCEDURE " |
| BSW control module branch line circuit | " DIAGNOSIS PROCEDURE " |
| Sliding door control unit RH branch line circuit | " DIAGNOSIS PROCEDURE " |
| Driver seat control unit branch line circuit | " DIAGNOSIS PROCEDURE " |
| Sliding door control unit LH branch line circuit | " DIAGNOSIS PROCEDURE " |
| Automatic back door control module branch line circuit | " DIAGNOSIS PROCEDURE " |
| IPDM E/R branch line circuit | " DIAGNOSIS PROCEDURE " |
SHORT CIRCUIT
| Malfunction area | Reference |
|---|
| CAN communication circuit | " DIAGNOSIS PROCEDURE " |
| Malfunction area | Reference |
|---|
| Side radar LH branch line circuit | " DIAGNOSIS PROCEDURE " |
| Side radar RH branch line circuit | " DIAGNOSIS PROCEDURE " |
SHORT CIRCUIT OR OPEN CIRCUIT
| Malfunction area | Reference |
|---|
| BSW communication circuit | " DIAGNOSIS PROCEDURE " |
