DTC Always Normal
SOURCE VOLTAGE DROPCIRCUIT DESCRIPTION
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor assy center 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.
The diagnosis system malfunction display for this circuit is different from other circuits, that is, the SRS warning light remains on and the normal system code is indicated when the source voltage drops.
Malfunction in this circuit is not recorded in the airbag sensor assy center, and when the source voltage returns to normal, the SRS warning light automatically goes off.
Wiring Diagram:
Step 1 - 2:
Step 3 - 4:
INSPECTION PROCEDURE