DESCRIPTION & OPERATION
| WARNING | Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article. |
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units, such as Engine Control Module (ECM), Transmission Control Module (TCM) and, if equipped, Anti-Lock Brake System/Traction Control System (ABS/TCS) Unit and I35 with Vehicle Dynamic Control/Anti-Lock Brake System/Traction Control System (VDC/ABS/TCS) Unit, are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN "H" line, CAN "L" line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. For models with traction control, See INPUT/OUTPUT SIGNALS (A/T WITH TCS) table and (Scheme 1), for I35 models with (VDC/ABS/TCS) see INPUT/OUTPUT SIGNALS (A/T WITH VDC/TCS, I35) table and (Scheme 2). For models with out traction control, see INPUT/OUTPUT SIGNALS (A/T WITH OUT TCS) table and (Scheme 3).
| Signals | ABS/TCS Control Unit | ECM | TCM |
|---|
| Accelerator Pedal Position Signal | Receive | Transmit | Receive |
| Output Shaft Revolution Signal | (1) | Receive | Transmit |
| TCS Self-Diagnostic Signal | Transmit | Receive | (1) |
| ABS Self-Diagnostic Signal | Transmit | Receive | (1) |
| (1) Component does not receive or transmit any signals to specified control unit. |
| (1) | Component does not receive or transmit any signals to specified control unit. |
INPUT/OUTPUT SIGNALS (A/T WITH TCS)
| Signals | VDC/ABS/TCS Control Unit | ECM | TCM | Steering Wheel Angle Sensor |
|---|
| Accelerator Pedal Position Signal | Receive | Transmit | Receive | (1) |
| Output Shaft Revolution Signal | (1) | Receive | Transmit | (1) |
| VDC/TCS Self-Diagnostic Signal | Transmit | Receive | (1) | (1) |
| ABS Self-Diagnostic Signal | Transmit | Receive | (1) | (1) |
| Engine Speed Signal | Receive | Transmit | (1) | (1) |
| Steering Wheel Angle Sensor | Receive | (1) | (1) | Transmit |
| (1) Component does not receive or transmit any signals to specified control unit. |
| (1) | Component does not receive or transmit any signals to specified control unit. |
INPUT/OUTPUT SIGNALS (A/T WITH VDC/TCS, I35)
| Signals | ECM | TCM |
|---|
| Accelerator Pedal Position Signal | Transmit | Receive |
| Output Shaft Revolution Signal | Receive | Transmit |
INPUT/OUTPUT SIGNALS (A/T WITH OUT TCS)
Scheme 1
Scheme 2
Scheme 3
Description
Controller Area Network (CAN) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN "H" line, CAN "L" line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. For Maxima see COMPUTER DATA LINES in 2002 SYSTEM WIRING DIAGRAMS NISSAN article.
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN "H" line, CAN "L" line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. For Maxima see COMPUTER DATA LINES in 2002 SYSTEM WIRING DIAGRAMS NISSAN article, for I35 see COMPUTER DATA LINES in 2002 SYSTEM WIRING DIAGRAMS INFINITI article
