DTC Always Normal

DTC Normal Source Voltage Drop

CIRCUIT DESCRIPTION




The SRS is equipped with a voltage increase circuit (DC DC converter) in the airbag sensor assembly in case the source voltage drops.

When the battery voltage drops, the voltage increase circuit (DC DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is displayed differently from other codes. The source voltage drop is indicated when the SRS warning light comes on without showing any DTCs.

A malfunction in this circuit is not recorded in the airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE