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4. Trouble Identification
(1) Trouble Record (DTC storage)
When the circular diagnostic tests are involved in identification of a trouble, the SRS ECU (HAE2.5) will
store relevant codes, first/last diagnosis time and frequency of the trouble in EEPROM.
 SRS ECU (HAE2.5) can store up to 6 troubles, low voltage trouble as well as two crash records (front
and side).
 The transmit of the DTCs are carried out in the way that the SRS ECU£¨HAE2.5£©via serial data
interface of the maintenance procedures assign the codes to the diagnostic detector.
No. Trouble Description Troubleshooting
1
Ignition circuit 1 (driver airbag), high resistance or open
circui
t
Yes
2
Ignition circuit 1 (driver airbag), low resistance or short
circui
t
Yes
3 Ignition circuit 1 (driver airbag), groun d Yes
4
Ignition circuit 1 (driver airbag), connected to power
source
Yes
5
Ignition circuit 2 (passenger airbag), high resistance or
open circui
t
Yes
6
Ignition circuit 2 (passenger airbag), low resistance or
short circuit
Yes
7 Ignition circuit 2 (passenger airbag), groun
d Yes
8
Ignition circuit 2 (passenger airbag), connected to power
source
Yes
9
Ignition circuit 3 (driver seat belt pretensioner), high
resistance or open circuit
Yes
10
Ignition circuit 3 (driver seat belt pretensioner), low
resistance or short circui
t
Yes
11 Ignition circuit 3 (driver seat belt pretensioner), groun d Yes
12
Ignition circuit 3 (driver seat belt pretensioner),
connected to power source
Yes
13
Ignition circuit 4 (passenger seat belt pretensioner), high
resistance or open circuit
Yes
14
Ignition circuit 4 (passenger seat belt pretensioner), low
resistance or short circui
t
Yes
15
Ignition circuit 4 (passenger seat belt pretensioner),
groun
d
Yes
16
Ignition circuit 4 (passenger seat belt pretensioner),
connected to power source
Yes
17 High voltage of power source Yes
18 Low voltage of power source Yes
19
Warning light trouble-connected to power source or
short circuit of the light bulb
Yes
20 Warning light trouble-ground or filament open circuit Yes
21 Missing/mistake of the algorithm parameters
No (replace SRS ECU (HAE2.5))
22 Previous crash recorde
d No (replace SRS ECU (HAE2.5))
DTCs as recognized by SRS ECU (HAE2.5)