Combination Switch Reading System: System Description
Refer to [ COMBINATION SWITCH READING SYSTEM: SYSTEM DESCRIPTION ].
Wake-up operation
- BCM transmits sleep wake up signal (wake up) to each unit when any condition listed below is established, and then goes into normal mode from low power consumption mode.
- Each unit starts transmissions with CAN communication by receiving sleep wake up signals. Each unit transmits wake up signals to BCM with CAN communication to convey the start of CAN communication.
Description
When replacing BCM, save or print current vehicle specification with SDT configuration before replacement.
Configuration has three functions as follows
- READ CONFIGURATION is the function to read (extract) vehicle configuration of current BCM.
- WRITE CONFIGURATION - Manual selection is the function to select and write vehicle configuration on BCM manually.
- WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted from current BCM.
| CAUTION | When replacing BCM, you must perform WRITE CONFIGURATION with SDT. Complete the procedure of WRITE CONFIGURATION in order. If you set incorrect WRITE CONFIGURATION, incidents will occur. Configuration is different for each vehicle model. Confirm configuration of each vehicle model. |
Vehicle specification needs to be written with SDT because it is not written after replacing BCM.
Configuration has three functions as follows
- READ CONFIGURATION is the function to read (extract) vehicle configuration of current BCM.
- WRITE CONFIGURATION - Manual selection is the function to select and write vehicle configuration on BCM manually.
- WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted from current BCM.
| CAUTION | When replacing BCM, you must perform WRITE CONFIGURATION with SDT. Complete the procedure of WRITE CONFIGURATION in order. If you set incorrect WRITE CONFIGURATION, incidents will occur. Configuration is different for each vehicle model. Confirm configuration of each vehicle model. |
During driving, the TPMS receives the signal transmitted from the transmitter installed in each wheel, when the tire pressure becomes low. The control unit (BCM) of this system has pressure judgment and trouble diagnosis functions.
When the TPMS detects low inflation pressure or another unusual symptom, the warning lamps in the combination meter comes on.
Operation Procedure
Refer to [ SELF-DIAGNOSIS (WITHOUT SDT) ].
Refer to [ CAN COMMUNICATION SIGNAL CHART ]