GENERAL INFORMATION
ETACS*-ECU has three main functions (gateway function, coding function and body electrical equipment control function).
Note. *: ETACS (Electronic Time and Alarm Control System)
Scheme 460
As a central ECU for the on-vehicle communication network system established in the vehicle, the gateway function is integrated into ETACS-ECU. The gateway function offers the following functions
- Data transfer among four networks* Transfers the data flowing in a network to another network in real time. NOTE: *: CAN-C (power train network), CAN-B (middle-speed body network), LIN (low-speed body network), diagnosis CAN-C (diagnosis exclusive network)
- Diagnosis of each network communication line Detects and stores an open circuit and short circuit of communication line.
- Communication error diagnosis of network ECUs Detects and stores the ECU that is not properly transmitting data.
TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU may have a malfunction, or the ETACS-ECU power supply or ground circuit may have a problem.
The power supply fuse or the ETACS-ECU may have a problem.
The power supply circuit or the ETACS-ECU may have a problem.
If the ETACS-ECU functions do not work at all, the ETACS-ECU power supply system, ground system, or ETACS-ECU may have a problem.
If there is an error to the ignition switch (ACC) input signal, or the ACC relay inside the ETACS-ECU does not operate, the ignition switch (ACC) signal is no longer output to the communication line.
If there is an error to the ignition switch (IG1) input signal, or the IG1 relay inside the ETACS-ECU does not operate, the ignition switch (IG1) signal is no longer output to the communication line.
If there is an error to the front door switch (LH) input signal, the front door switch (LH) signal is no longer output to the communication line.
If there is an error to the front door switch (RH) input signal, the front door switch (RH) signal is no longer output to the communication line.
If there is an error to the rear door switch (LH) input signal, the rear door switch (LH) signal is no longer output to the communication line.
If there is an error to the rear door switch (RH) input signal, the rear door switch (RH) signal is no longer output to the communication line.
If there is an error to the trunk lid latch input signal, the trunk lid latch signal is no longer output to the communication line.
If there is an error to the hazard warning light switch input signal, the hazard warning light switch signal is no longer output to the communication line.
The ETACS-ECU receives the column switch signal via the LIN communication. If there is an abnormality to column switch or LIN bus line, the lights and wiper/washer do not work normally.
If there is an error to the hood switch input signal, the hood switch signal is no longer output to the communication line.