Srs-Ecu - Mitsubishi 2013 Outlander Service Manual

52B-14
When passenger's air bag cut off switch is turned
ON, the indicator goes off to show that the passen-
ger's (front) air bag is operational.

SRS-ECU

In addition to the analogue G-sensor and safing
G-sensor for the frontal collision, the SRS-ECU
incorporates the analogue G-sensor and safing
G-sensor for the side collision. Upon a frontal colli-
sion, when the impact G is simultaneously detected
by the front impact sensor in the engine room, ana-
logue G-sensor, and safing G-sensor for the frontal
collision in SRS-ECU, SRS-ECU outputs the ignition
signal to the driver's and passenger's (front) air bag
modules (squibs).
Upon a side collision, when the lateral impact G is
simultaneously detected by the analogue G-sensor
of side impact sensor and the safing G-sensor for
side collision in SRS-ECU, the SRS-ECU outputs the
ignition signal to the side-airbag module (squib) and
the curtain air bag module (squib) of the relevant
side that is subjected to the impact.
Also, SRS-ECU has the following functions that
improve the system reliability.
• Power supply back-up function (back-up con-
denser) in preparation for the power supply mal-
function upon a collision
• Booster function (DC-DC converter) in prepara-
tion for the battery voltage drop
• Diagnosis function that performs a system check
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SYSTEM CONSTRUCTION
DIAGNOSIS FUNCTION
To improve the system reliability, SRS-ECU performs
the diagnostics of each part. If a malfunction is
detected, it lights up the SRS warning lamp, and
stores the contents as the corresponding diagnosis
M2521007001054
code. Also, to facilitate the system check, it has the
following functions, and the check can be performed
using M.U.T.-III.
DIAGNOSIS CODE SET
SRS-ECU performs a self-diagnosis on the following
items. If a malfunction is detected, its content (diag-
nosis code) is stored in the involatile memory (EEP-
ROM
erased even when the battery terminal is discon-
nected. The diagnosis code can be erased using
M.U.T.-III.
NOTE:
DATA LIST OUTPUT
Using M.U.T.-III, the service data can be read.
NOTE: For service data items, refer to Workshop
Manual.
ACTUATOR TEST
Using M.U.T.-III, the actuator can be forcibly oper-
ated. For the actuator test specification, refer to
Workshop Manual.
• Diagnosis code set
• Service data output
• Actuator test
*
). Therefore, the diagnosis code will not be
.
•
*
: EEPROM (Electrical Erasable & Programmable
Read Only Memory): ROM that can be pro-
grammed or erased electrically
•
For each diagnosis item, refer to Workshop Man-
ual.