Page 2071 - Foton Workshop Manual - Tunland (AT)

SUPPLEMENTAL RESTRAINT SYSTEM - SUPPLEMENTAL RESTRAINT SYSTEM 62-1

SUPPLEMENTAL RESTRAINT SYSTEM

PRECAUTION
DANGER

• Some vehicles are equipped with Supplemental Restraint System (SRS), i.e.,
driver airbag. Failure to carry out service operations in the correct sequence 62
may cause the SRS to unexpectedly deploy during servicing, or even lead to
critical accident. Furthermore, an operational mistake may also prevent the SRS
from normal operations. Before servicing (including removal, installation,
inspection or replacement of any part), be sure to read through the following
items carefully and perform the correct procedures described in the service
manual.
• Operation can only be started 90 seconds after the ignition switch is turned to
the “LOCK” position and the negative (-) cable and the positive (+) cable are
disconnected from the battery. (The SRS is equipped with backup power supply.
Therefore, if any operation is taken within 90 seconds after disconnecting the
battery negative (-) cable and positive (+) cable, the SRS may deploy suddenly.)
• Do not expose the horn button assembly to heat or flame.

WARNING

• Since it is difficult to identify the failure of the SRS, Diagnostic Trouble Code
(DTC) is an essential source of information during troubleshooting.Thus, when
troubleshooting the SRS, always remember to check the DTCs before
disconnecting the battery.
Even after a minor impact that the SRS does not deploy, it is always important to check
the horn button assembly and airbag ECU. (Refer to “Chapter 62. Supplemental
restraint system - horn button assembly, replacement”, “Chapter 62. Supplemental
restraint system - airbag ECU, replacement”)

• Before repairing, remove the airbag ECU first if the service may result in any
impact onto it. (Refer to “Chapter 62. Supplemental restraint system - airbag
ECU, replacement”)
• Never use any SRS part from another vehicle. If replacement is required, be sure
to use new spare parts. Do not disassemble the horn button assembly.

• If the horn button assembly has been dropped, or there are cracks, dents or
other faults on the housing, replace it with a new one.
• Use a multimeter with high resistance to troubleshoot the SRS electrical circuits.
• During servicing, be sure to follow the instructions on the labels attached to the
SRS components.

Page 2071