Pre-Collision Safety System

POWER SOURCE CIRCUIT

CIRCUIT DESCRIPTION

This circuit supplies power to operate the seat belt control ECU.

Ignition power supply to the seat belt control ECU:

Turn the ignition switch to the ON position to turn the D-IG1 relay on. The driver side J/B ECU supplies power to the luggage room J/B ECU, and the L-IG1 relay turns on to supply power to the seat belt control ECU.

HINT: There may be a malfunction in the power source circuit if the pre-collision safety system does not operate normally even when both DTCs and normal system codes are not output, or if the normal system code is output and DTCs are not output.

Wiring Diagram:

Step 1-2:

INSPECTION PROCEDURE