CONFIGURATION (BCM) : Description
Vehicle specification needs to be written with CONSULT-III because it is not written after replacing BCM.
Configuration has three functions as follows
| Function | Description |
|---|---|
| READ CONFIGURATION | Reads the vehicle configuration of current BCM. Saves the read vehicle configuration. |
| WRITE CONFIGURATION - Manual selection | Writes the vehicle configuration with manual selection. |
| WRITE CONFIGURATION - Config file | Writes the vehicle configuration with saved data. |
DESCRIPTION AND FUNCTION TABLE
Note. Manual setting item: Items which need selection by vehicle specifications; Automatic setting item: Items which are written in automatically (Setting can not be changed)
| CAUTION | When replacing BCM, you must perform "WRITE CONFIGURATION" with CONSULT-III. Complete the procedure of "WRITE CONFIGURATION" in order. If you set incorrect "WRITE CONFIGURATION", incidents might occur. Configuration is different for each vehicle model. Confirm configuration of each vehicle model. Never perform "WRITE CONFIGURATION" except for new BCM. |
Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced as follows: INPUT 1 - 5 to "1 - 5" and OUTPUT 1 - 5 to "A - E".
Example 1: When a switch (TURN RH switch) is turned ON
Scheme 1
- The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
- BCM detects the combination switch status signal "1E" when the signal of OUTPUT 5 is input to INPUT 1.
- BCM judges that the TURN RH switch is ON when the signal "1E" is detected.
Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON
Scheme 2
- The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the TURN RH switch and FR WIPER LOW switch are turned ON.
- BCM detects the combination switch status signal "1CE" when the signals of OUTPUT 3 and OUTPUT 5 are input to INPUT 1.
- BCM judges that the TURN RH switch and FR WIPER LOW switch are ON when the signal "1CE" is detected.
Wake-up operation
- BCM changes from the low power consumption mode to the CAN communication sleep mode when the any of the BCM wake-up conditions is fulfilled. Only the control with BCM is activated.
- BCM transmits the sleep wake up signal (wake up) to each unit when any of the CAN wake-up conditions is fulfilled. It changes from the low power consumption mode or the CAN communication sleep mode to the normal mode.
- Each unit starts the transmission of CAN communication with the sleep wake up signal. In addition, the unified meter and A/C amp. transmits the wake up signal to BCM via CAN communication to report the CAN communication start.
Wake-up condition
| BCM wake-up condition | CAN wake-up condition |
|---|---|
| Power window switch communication: Receiving Remote keyless entry receiver: Receiving | Receiving the sleep-ready signal (Not-ready) from any units Key slot (key switch): OFF --> ON, ON --> OFF Push-button ignition switch (push switch): OFF --> ON Hazard switch: OFF --> ON PASSING switch: OFF --> ON, ON --> OFF TAIL LAMP switch: OFF --> ON Driver door switch: OFF --> ON, ON --> OFF Passenger door switch: OFF --> ON, ON --> OFF Rear RH door switch: OFF --> ON, ON --> OFF Rear LH door switch: OFF --> ON, ON --> OFF Back door switch: OFF --> ON, ON --> OFF Driver door request switch: OFF --> ON Passenger door request switch: OFF --> ON Back door opener request switch: OFF --> ON Stop lamp switch: ON ICC brake hold relay (with ICC): ON |
WAKE-UP CONDITION REFERENCE
Scheme 3
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Table. Refer to CAN COMMUNICATION SIGNAL TABLE .
U0415 is displayed if any unusual condition is present in the reception status of the vehicle speed signal from the ABS actuator and electric unit (control unit).
HIGH FLASHER OPERATION
BCM detects the turn signal lamp circuit status by the current value.
BCM increases the turn signal lamp blinking speed if the bulb or harness open is detected with the turn signal lamp operating.
Note. The blinking speed is normal while activating the hazard warning lamp.
See also:
• CAN COMMUNICATION SIGNAL TABLE