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.





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

(c) Reconnect the connectors.

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





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 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.

(c) Reconnect the connector.

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





(e) Waveform 1





(1) CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.

(f) Waveform 2









(g) Waveform 3









(h) Waveform 4





(1) CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.