Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: TERMINALS OF ECU

1. CHECK SEAT BELT CONTROL ECU





(a) Disconnect the seat belt control ECU connectors.

(b) Measure the resistance and voltage according to the value(s) in the table below.





(c) If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Reconnect the seat belt control ECU connectors.

(e) Measure the voltage according to the value(s) in the table below.





(f) If the result is not as specified, the ECU may be malfunctioning.

2. CHECK DRIVING SUPPORT ECU





(a) Disconnect the driving support ECU connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.





(c) Measure the voltage and resistance according to the value(s) in the table below.

If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Reconnect the driving support ECU connector.

(e) Check for pulses according to the value(s) in the table below.





(f) Waveform 1





(1) CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.

(g) Waveform 2





(1) CAN communication signal





3. CHECK DRIVER MONITOR ECU





(a) Disconnect the driver monitor ECU connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





(c) If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Reconnect the driver monitor ECU connector.

(e) Measure the voltage and check for pulses according to the value(s) in the table below.





(f) If the result is not as specified, the ECU may be malfunction.

(g) Waveform 1





(1) CAN communication signal





(h) Waveform 2





(1) CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.