4 Runner Limited 2WD V6-3.4L (5VZ-FE) (1997)
Air Bag Control Module: Testing and Inspection
Normal Source Voltage Drop
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.
The diagnosis system malfunction display for this circuit is different to other circuits-when the SRS warning light remains lit up and the DTC is a
normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to normal, the SRS warning light
automatically goes off.
DETECTING CONDITION
WIRING DIAGRAM