Trouble Diagnosis; General Diagnosis - SSANGYONG Rexton 2004 Service Manual

TROUBLE DIAGNOSIS

GENERAL DIAGNOSIS

Warning Lamp Check
As soon as the opening voltage is applied to the sensing
and diagnostic module (SDM) ignition input, the SDM ac-
tivates the warning lamp for a bulb check. The SDM al-
lows the lamp to blink at seven times for 7 seconds and
then turn off.
During the bulb check, the SDM is not ready to detect a
crash or deploy the supplemental inflatable restraints.
Fault Indication
The sensing and diagnostic module records the system's
faults in two categories:
• Active Fault
Current detected faults and the "C" appears the first digit of
the fault code on the scan tool display (example: "C16").
• History Fault
These faults that were detected in the past, but are no
longer active. The "H" appears the first digit of the fault
code on the scan tool display (example: "H17").
Diagnosis by using warning lamp
• The warning lamp flashes for 7 seconds at seven times
and turn off : Normal Status - There is not any history
or current fault code.
• The indicator turns on for 7 seconds and then turn off :
Normal Status - A fault has been detected previously
but now there is not any more of the same detected
fault. Clear the fault using the scan tool.
• The indicator turns on for 7 seconds and turns off for 1
second and then turn on again: Abnormal Status - It
has detected a current fault or has been occurred same
fault more than five times, or has been occurred more
than five types of faults. Perform the diagnosis using
the scan tool.
AIRBAG SYSTEM
REXTON SM - 2004.4
• Warning lamp stays ON: Connection fault between
the SDM wiring harness connector and the SDM
connector, or the airbag wiring harness fault.
• No the indicator turn ON: Power supply malfunction,
indicator circuit open, bulb fault, SDM internal defect.
Diagnosis by using scan tool
• Check the fault code by connecting the diagnostic
(ALDL) connector.
• Receive serial data from terminal 9 of the ALDL
connector.
• Receive the ground signal from terminal 4 or 5 of the
ALDL connector.
Clearing Fault Codes
When the sensing and diagnostic module (SDM) receives
the "CODE ERASE" command from the scan tool, the
SDM:
• Clears the entire fault memory.
• Turns OFF the warning lamp.
• When it is removed the scan tool after clearing the
fault code, the SDM rechecks the airbag system to
detect the SDM's fault.
Y220_12028
External fault
Service personnel can reset the SDM and turn OFF the
warning lamp if the fault is an external fault.
Internal fault
An internal fault of the SDM or a CRASH RECORDED
fault code cannot be reset.
In the case of an internal fault of the SDM or a CRASH
RECORDED fault code, the SDM must be replaced.
Microprocessor-Independent
Lamp Activation
If the sensing and diagnostic module (SDM) electrical
connector is not properly attached, the SDM cannot func-
tion and cannot control the warning lamp.
If this fault is present, the warning lamp will operate inde-
pendently from the SDM through the use of shorting bars
that are built into the SDM connector.
Notice
Do not measure the resistance of the airbag module
because the multimeter's battery may deploy the air
bag causing any personal injury.
12-21
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN