2008 GEELY CK airbag

242Chapter 7
SRS (Supplemental Restraint System)Section 1 SRS-General InformationI. PRECAUTIONFor safe reasons, read the following precautions before starting any operation.
1. When servicing the SRS, correct sequence and items are described in the following chapter.
2. Instruments and special tools recommended in this chapter shall be used for operation.
3. When servicing the following components, replace them with the new ones if there is a failure.
(1) SRS ECU
(2) Clock Spring Module
(3) Driver Airbag Module
(4) Passenger Airbag Assembly (Option)
4. If there is any abnormality in the wire harness of the SRS, replace it with a new one. Correct or replace the
abnormal wire harness in accordance with Table 1.
Figure 1 (Table 1)No De signation De scription
1 Belt-pretensioner, Driver, Low Seat belt pretensioner, driver side, low position
2 Belt-pretensioner, Driver, High Seat belt pretensioner, driver side, high position
3 Belt-pretensioner, Passenger, High Seat belt pretensioner, passenger side, high position
4 Belt-pretensioner, Passenger, Low Seat belt pretensioner, passenger side, low position
5 IGN Battery voltage
6 GND Ground-ground w ire
7 WL Airbag w arning light
9 K Diagnostic serial data I/O (K line)
10 DAB Hi Driver airbag, high positionE C U T e r mina l D e s c r ipt ion

2435. Servicing operation shall be carried out 60s after the negative
(-) terminal cable is disconnected from the battery. In addition,
the disconnected negative (-) terminal cable shall be protected
with insulating tape for insulation.
In order to deploy an airbag within a certain time period after the
battery is disconnected, condenser in the ECU shall retain some
electrical energy. Otherwise, it could lead to a serious accident
because of the unexpected deployment of airbag.
6. During spray paint work, ECU, airbag assembly, clock spring
assembly, etc shall be removed and kept in place to avoid the effects of overheat. (Over 93¡æ)
7. When the SRS is serviced, a diagnostic scan meter is used to clear the DTC to enable the normal work of
the warning light.1 1 D AB Lo D r iv er a ir b ag , lo w p o s it io n
13 (Option) PAB Hi Passenger airbag, high position
14 (Option) PAB Lo Passenger airbag, low position
20Passenger Airbag Deactivation
Indic atorPassenger airbag deac tivation indic ator light
27PPD/ Passenger Airbag
Deac tivation Sw itch, HighPassenger airbag deac tivation sw itc h, high position
30 Crash Output Crash outputInsulating TapeBatteryCableDriver Side
Warning LampPassenger Side
Warning LampDriver Seat Inflation
Element & AirbagCrash Sensor &
Diagnostic ModuleFront/RH Inflation
Element & Airbag

2454. 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.
ySRS ECU (HAE2.5) can store up to 6 troubles, low voltage trouble as well as two crash records (front
and side).
yThe 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 De scription Trouble shooting
1Ignition c irc uit 1 (drive r a irba g), high re sista nc e or ope n
circui
tYes
2Ignition circuit 1 (driver airbag), low resistance or short
circuitYes
3 Ignition circuit 1 (driver airbag), groundYes
4Ignition c irc uit 1 (drive r a irba g), connec te d to power
sourc eYes
5Ignition circuit 2 (passenger airbag), high resistance or
ope n c irc ui
tYes
6Ignition circuit 2 (passenger airbag), low resistance or
short c ircuitYes
7 Ignition circuit 2 (passenger airbag), groundYes
8Ignition circuit 2 (passenger airbag), connected to power
sourc eYes
9Ignition c irc uit 3 (drive r se a t belt pre tensione r), high
re sista nc e or ope n c irc uitYes
10Ignition c irc uit 3 (drive r se a t belt pre tensione r), low
resistance or short circui
tYes
11 Ignition c irc uit 3 (drive r se a t belt pre tensione r), groundYes
12Ignition c irc uit 3 (drive r se a t belt pre tensione r),
connec te d to power sourc eYes
13Ignition circuit 4 (passenger seat belt pretensioner), high
re sista nc e or ope n c irc uitYes
14Ignition circuit 4 (passenger seat belt pretensioner), low
resistance or short circui
tYes
15Ignition circuit 4 (passenger seat belt pretensioner),
groun
dYes
16Ignition circuit 4 (passenger seat belt pretensioner),
connec te d to power sourc eYes
17 High volta ge of powe r source Ye s
18 Low voltage of powe r sourc e Ye s
19Wa rning light trouble -c onne c te d to powe r sourc e or
short c ircuit of the light bulbYes
20 Wa rning light trouble -ground or fila me nt ope n c ircuit Ye s
21 Missing/mista ke of the algorithm parame te rs
No (replace SRS ECU (HAE2.5))
22 Previous crash recorde
dNo (replace SRS ECU (HAE2.5)) DTCs as re c ognize d by SRS ECU (HAE2.5)

246 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.23 C ommunication trouble Y e s
24 Inte rna l trouble (se e the follow ing ta ble )No (replace SRS ECU (HAE2.5))
25PADS （
passenger airbag deactivation
sw itch）
, connected to power source or open
circuitYes
26PADS （
passenger airbag deactivation
sw itch）
, ground or short c irc uitYes
27 PADS (passenger airbag switch), trouble Yes
28 C ra sh output pin, ground Y e s
29C ra sh output pin, short c irc uite d to pow e r
sourceYes
30PADI (passenger airbag deactivation switch
indic ator light) error, c onnected to pow er source
or light bulb short c irc uitYes
31PADI (passenger airbag deactivation switch
indic a tor light) e rror, ground or ope n c irc uitYes
32 Se a t be lt pre te nsione r se pa ra te ignition Y e s, up to 5 time s
33Se a t be lt pre te nsione r se pa ra te ignition for 6
time sNo (replace SRS ECU (HAE2.5))No. Trouble De sc ription DTC
1 Ignition c irc uit 1 (drive r a irba g), high re sistanc e or ope n circ uit B1 346
2 Ignition c irc uit 1 (drive r a irba g), low re sista nc e or short c irc uit B1 347
3 Ignition c irc uit 1 (drive r a irba g), groundB1 348
4 Ignition c irc uit 1 (drive r a irba g), c onne cte d to powe r sourc e B1 349
5 Ignition c irc uit 2 (pa sse nge r a irbag), high re sista nc e or ope n c ircuit B1 352
6 Ignition c irc uit 2 (pa sse nge r a irbag), low resista nce or short c irc uit B1 353
7 Ignition c irc uit 2 (pa sse nge r a irbag), groundB1 354
8 Ignition circuit 2 (passenger airbag), connected to power source B1 355
9 Ignition c irc uit 3 (drive r se a t belt pre te nsione r), high re sista nc e or ope n c ircuit B1 361
10 Ignition c irc uit 3 (drive r se a t belt pre te nsione r), low resista nce or short c irc uit B1 362
11 Ignition c irc uit 3 (drive r se a t belt pre te nsione r), ground B1 363
12 Ignition c irc uit 3 (drive r se a t belt pre te nsione r), c onne c t to power sourc e B1 364
13Ignition c ircuit 4 (passe nger se a t be lt pre tensione r), high re sista nc e or open
circuitB1 367 Diagnostic DTCs

247(2) Internal troubles
The micro controller can check the following items not
only in the initiation check but also in the circular diagnos-
tic check.
1Trigger transistor of ignition circuit: high-end transistor
can be checked not only in the initiation check but
also in the circular diagnostic check. However, since
the low-end transistor is open when connected in short
circuit to power source, it can only be checked in the
initiation check to avoid explosion.
2The ignition voltage is provided by supercharge
converter.
3The acceleration sensor performs selfcheck in the
initiation check.
4Range of allowed deviation of acceleration sensor in the circular diagnostic check.
5Microcontroller includes AD converter, ROM, RAM, etc.
6Status of safety sensor.NOTICE
The connectors of the squib circuit contain a
shorting bar. When the connector is not
connected, the unexpected deployment is
caused by the short in the circuit arising from
the contact of the positive (+) and negative (-)
terminals or the static electricity. If there is
poor connection for connectors, the symptom
may not be removed even when the shorting
bar is connected.14Ignition c irc uit 4 (passe nger se a t be lt pre tensione r), low re sistanc e
or short c irc uitB1 368
15 Ignition c ircuit 4 (passe nger se a t be lt pre tensione r), groundB1 369
16Ignition c ircuit 4 (passe nger se a t belt pre te nsione r), c onne c t topowe r sourceB1 370
17 High volta ge of powe r sourc e B1 111
18 Low volta ge of power sourc e B1 112
19Warning light trouble -c onne c te d to powe r sourc e or light bulb short
circuitB2 500
20 Warning light trouble -ground or filame nt ope n circ uitB2 500
21 Missing/mistake of the algorithm parameters B1 661
22 Previous crash recordedB1 650
23 Communic a tion trouble B1 407
23 Inte rna l trouble (se e the following ta ble) B1 620
24PADS（
pa ssenge r airba g de a ctiva tion switch）
, c onne c ted topowe r source or open c irc uitB1 527
25PADS（
passenger airbag deactivation switch）
, ground or short
circuitB1 528
26 PADS (passenger airbag deactivation switch), trouble B1 529
27 Cra sh output pin, groundB1 676
28 Cra sh output pin, short c irc uite d to power sourc e B1 677
29PADI (passenger airbag deactivation switch indicator light) error,
c onne c ted to powe r sourc e or light bulb short c irc uitB2 505
30PADI (passenger airbag deactivation switch indicator light) error,
ground or open c irc uitB2 505
31 Se a t be lt pre tensione r se pa ra te ignitionB1 657
32 Se a t be lt pre tensione r se pa ra te ignition for 6 time s B1 658

248An external watchdog can check the operation situation of the microcontroller. The failure of the microcontroller
can trigger the watchdog, which in turn can reset the microcontroller and turn on the warning light.No. List of Trouble s Trouble De sc ription
1 M ic r oc ont r olle rz AD c onve rte r or EEP ROM trouble (in
case of RAM and ROM failure, the
mic r oc ont r olle r w ill r e s e t a nd t he w a r ning
light will light up.)z Activate troublez
Che ck the circ uit troublez Activate troublez Check the circuit troublez Activate troublez Chec k the c irc uit troublez Activate troublez Chec k the c irc uit troublez Activate troublez Check the circuit troublez Activate troublez Check the circuit trouble
6 Ignition volta gez Low
7 Wa tchdog/rese tz Trouble
8 Maximum times of e xplosion of the se a t belt
pretensionerz 6
9 Ene rgy stora ge time (self-support time )z Shortz Ra nge of de via tionz Se nsor not in ste ady modez Se nsor se lfc hec k trouble
11 Continuous abortion of ignition circ uit che c kz None xec ution of c irc ula r diagnostic test
(Repeated algorithm calculation)z Close for 2 or more tha n 2 sec ondsz Sa fe ty se nsor is open c irc uit when
calculating the trouble with algorithm
13 Ignition c urre ntz All the ignition currents are normal
when the current SRS is deployed
14 No c onfirma tion of side SRS ignitionz Eve n if the SRS ECU (HAE2.5) ha ve
received for 5 times the ignition information
during the HSIS ignition cyc le, the side SRS
a irba g ignition c a n not be ve rifie d by SRS
ECU (HAE2.5). Seat belt pretensioner ignition circuit (if realized)
5 P asse nger se a t be lt pre tensione r ignition c irc uit
(if realized) 2 P asse nger airba g ignition c ircuit
3 P asse nger airba g ignition c ircuit (if re a lize d)[Ta ble ] Inte rna l troubles pre dic te d by SRS ECU (HAE2.5)
10 Accelerometer
12 Sa fe ty se nsor6 Driver airbag ignition circuit (if realized)
7 P asse nger airba g ignition c ircuit (if re a lize d) 4

251Section 2 TroubleshootingI. LIST OF TROUBLES1. SRS warning light OFFDIAGNOSTIC PROCEDURESWhen performing the first diagnostic check, it is advised to shake slightly the harness and connector to see if
there is any discontinuous poor contact in circuit. If there is such a problem, make sure that the connections
of the connector, terminals and wire harness are correct and undamaged. Otherwise, follow these procedures:
(1) Check other wire harnesses and instrument cluster indicator lights
1Turn the ignition switch ON.
2Any other light on?
Yes: turn the ignition switch to LOCK, and continue with the next step.
No: check the power supply and ground system (fuse) of the instrument cluster, and continue with step 5.
(2) Check light bulb
CAUTION:
Mishandling of SRS components may release unexpectedly airbag and seat belt pretensioner, probably lead-
ing to a serious accident. Read the service cautions before handling a SRS component.
1Turn the ignition switch to LOCK.
2Disconnect the negative (-) terminal cable from the battery and wait for at least 60s.
3Remove the instrument cluster.
4Measure and see if the two pins of the SRS warning light is triggered.
Yes: continue with next step.
No: replace the bulb of the warning light.
Trouble Che c king Status P ossible Ca use
·Loss of voltage (fuse c irc uit bre a k)
·Instrument cluster trouble
·Trouble of wire harness between instrument
cluster and ECU SRS warning light OFF SRS wa rning c ircuit trouble1 SRS warning light is OFF SRS wa rning c irc uit trouble. No. Trouble shooting Ite ms De sc ription
2 SRS warning light re mains on SRS wa rning circ uit trouble or exte rna l trouble.

253Yes: continue with next step.
No: check the circuit, repair it and continue with step (5).
8Turn the ignition switch to LOCK.
9Check the continuity of the terminal of instrument connector and that of diagnostic interface (check the
two ends of K line).
Yes: continue with next step.
No: repair or replace the wire harness. Continue with step (5).
VMake sure to disconnect the negative terminal cable from the battery and wait for at least 60s.Disconnect
the ECU connector. 11Disconnect the connectors of the instrument cluster 12 Are the connector terminals 5, 7 and 9 and those of instrument cluster continuity?
Yes: continue with next step.
No: replace the wire harness, and then continue with step (5). 13Remove ECU and see whether the terminals are in good condition and whether the shorting bar is
broken.
Yes: replace the ECU.
No: reconnect the ECU connector, and then continue with next step.
(3) Make sure of the nonrecurrence of the trouble after repair
1Turn the ignition switch to LOCK.
2Disconnect the negative (-) terminal cable from the battery and wait for at least 60s.
3Connect all the ECU connectors.
4Connect the connector of driver airbag assembly.
5Connect the connector of passenger airbag assembly.
6Connect the connectors of driver and passenger seat belt pretensioners (vehicle with pretensioner).
7Connect clock spring connector.
8Connect the negative (-) terminal cable of the battery.
9Turn the ignition switch to ON.
VIs the SRS warning light working normal?
Yes: the trouble is eliminated. Explain the repair procedures to the Customer.
No: recheck symptoms of the trouble. Repeat these procedures from the first step if the trouble reoccurs.