Malfunction display of SRS could confirm originally by the flash of indicating light, detailed information
could be gained by malfunction diagnostic tool.
a. Safety airbag indicating light is driven by ECU, all malfunction displays are finished by ECU. After
working voltage is supplied for safety airbag controller (KD4.1) by battery, safety airbag controller
(KD4.1) illuminates indicating light to check SRS. To notify driver that there are some malfunctions
in system, indicating light will illuminate for long time after working voltage is supplied. If existing
SRS does not have any malfunction, indicating light will close after illuminating for five seconds
after ignition on. In original phase, safety airbag controller (KD4.1) does not prepare to check the
impact and stop the unfold until the wire of safety airbag controller (KD4.1) is reliable.
After ignition switch is turned to “ON” gear, the display type of indicating light when there is no any
malfunction in SRS is:Assembling malfunction information of subassembly could see follow table 1.
Table1: Assembling malfunction information indicating table for airbag subassembly
Schematic drawing for slow flash indicating light
Supplemental restraint system--Malfunction treatment 245 Ignition switch “ON”IlluminateExtinguishNumber Malfunction type Slow flash times (N times) Remark
1 Igniter at the side of driver happens short circuit 3
2 Igniter at the side of driver happens open circuit 4
3 Igniter at the side of driver connects grounding 5
4 Igniter at the side of driver connects battery 6
5 Igniter at the side of passenger happens short circuit 7
6 Igniter at the side of passenger happens open circuit 8
7 Igniter at the side of passenger connects grounding 9
8 Igniter at the side of passenger connects battery 10
9 Safety belt at the side of driver happens pre-tightening malfunction 11
10 Safety belt at the side of passenger happens pre-tightening malfunction 12
12 Impact output interface happens malfunctionor wrong explosion
of airbag subas-
sembly will make
big hurt for human,
its warning rea-
sons should be di-
vided detailedly.