Mitsubishi Outlander GS45X. Manual — part 213
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54A-849
DTC No.U1540 Theft alarm SNSR. LIN checksum
CAUTION
Before replacing the ECU or sensor, ensure that the power supply circuit, the ground circuit and the
communication circuit are normal.
.
JUDGMENT CRITERIA
The ETACS-ECU will set diagnostic trouble code No.
U1540 when abnormal signals are received from the
theft alarm sensor.
.
PROBABLE CAUSES
Faulty theft alarm sensor
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code.
Check again if the diagnostic trouble code is set to the
ETACS-ECU.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
Connect scan tool MB991958. Refer to "How to connect scan
tool (M.U.T.-III)
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(3) Check if DTC is set.
Q: Is the DTC set?
YES : Replace the theft alarm sensor.
NO : A poor connection, open circuit, or other intermittent
malfunctions in the LIN bus lines between the theft
alarm sensor and the ETACS-ECU (Refer to GROUP
00
− How to Cope with Intermittent Malfunction
).
ZC501967
AC404789
AC702802
MB991824
MB991827
MB991910
Data link
connector
AB
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54A-850
TROUBLE SYMPTOM CHART
M1547001500839
Trouble symptom
Inspection
Procedure
No.
Reference
page
The theft-alarm is not armed (the theft-alarm indicator does not illuminate).
1
The interior alarm does not work normally while the theft-alarm is triggered.
2
Theft-alarm horn does not sound while the theft-alarm system is triggered.
3
Horns do not sound while the theft-alarm system is triggered.
4
The activated theft-alarm siren sounds even though no faulty operation is
made.<Vehicles with theft alarm sensor>
5
Security alarm siren does not sound. <Vehicles with theft alarm sensor>
6
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54A-851
SYMPTOM PROCEDURES
Inspection Procedure 1: The theft-alarm is not armed (the theft-alarm indicator does not illuminate).
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communi-
cation circuit are normal.
.
Theft-alarm Indicator Circuit
ETACS-
ECU
RELAY
BOX
FUSIBLE
LINK
36
CENTER
PANEL
UNIT
ENGINE
COMPARTMENT
AC703148 AD
Connector: C-104
C-104
ACA02655AB
Connector: C-307, C-317
C-307 (B)
C-317
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54A-852
TECHNICAL DESCRIPTION (COMMENT)
If this function does not work normally, the input sig-
nal circuits to the components below, the theft-alarm
indicator, the ETACS-ECU or the CAN bus line may
have a problem.
• Keyless entry transmitter
• Key reminder switch
• Ignition switch (ACC)
• Hood latch switch
• Door switches
• Liftgate latch switch
.
TROUBLESHOOTING HINTS
• CAN bus line may be defective
• Theft-alarm indicator may be defective
• Keyless entry transmitter may be defective
• The key reminder switch may be defective
• Door switch may be defective
• Liftgate latch switch may be defective
• Hood latch switch may be defective
• The KOS-ECU may be defective
• The WCM may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
scan tool (M.U.T.-III)
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C,
).
ZC501967
AC404789
AC702802
MB991824
MB991827
MB991910
Data link
connector
AB
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