Mitsubishi Outlander GS45X. Manual — part 212

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54A-845

STEP 1. Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code.
Check if DTC 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)

P.54A-839

."

(1) Turn the ignition switch to the "ON" position.
(2) Check whether the ETACS-ECU DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU (Refer to

P.54A-733

).

NO : Go to Step 2.

STEP 2. Theft alarm sensor operation check
Ultrasonic wave sensor check

1. With the windows of the vehicle opened, set the theft alarm

to the "Ready to be triggered" condition.

2. Put the arm from the outside to the inside of the vehicle.
3. Check that the theft alarm siren sounds.

Tilt angle sensor check

1. With the windows of the vehicle opened, set the theft alarm

to the "Ready to be triggered" condition.

2. Raise the front wheels or rear wheels.
3. Check that the theft alarm siren sounds.

Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer

to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction

P.00-15

).

NO : Go to Step 3.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54A-846

STEP 3. Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code.
Check if diagnostic trouble code No. B120A is set to the
ETACS-ECU.
Q: Is diagnosis trouble code No.B120A set?

YES : Perform the troubleshooting of diagnosis trouble code

No.B120A. (Refer to

P.54A-842

)

NO <The ultrasonic wave sensor is defective, or the
ultrasonic wave sensor and the inclination sensor are
defective> : Go to step 4.
NO <Only the inclination sensor is defective> : Go to

step 5.

STEP 4. Check the customize function.
Check if the ultrasonic wave sensor of the theft alarm senor
operates when the sensitivity of the theft alarm senor is set to
"Level 1".
Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer

to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction

P.00-15

).

NO : Go to step 5.

STEP 5. Replace the theft alarm sensor temporarily, and
check whether the diagnostic trouble code is set.
Check again if the diagnostic trouble code is set to the
ETACS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the

ON position.

(3) Check if DTC is set.
Q: Is the DTC set?

YES : Replace the ETACS-ECU.
NO : Replace the theft alarm sensor.

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54A-847

DTC B120C Theft alarm siren Flat Battery

CAUTION

Before replacing the ECU or sensor, ensure that the power supply circuit, the ground circuit and the
communication circuit are normal.

.

DIAGNOSTIC FUNCTION

The diagnostic trouble code No.B120C is set when
the voltage of the rechargeable battery is low, or
when the battery inside the security alarm siren has
an error.
NOTE: The rechargeable battery integrated in the
security alarm siren is charged by turning the ignition
switch to the ON position.

.

PROBABLE CAUSES

• Abnormality in theft alarm siren

• Service life of rechargeable battery

• Since the vehicle had been stationary for long

time, the rechargeable battery remained
uncharged. This reduced voltage.

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.
Recheck whether the diagnosis trouble code is set.

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)

P.54A-839

."

(1) Charge the rechargeable battery of the security alarm siren

by turning the ignition switch to the ON position. (In
principle, charge the battery for 30 minutes or more.)

(2) Erase the diagnosis trouble code.
(3) After the diagnosis trouble code is erased, turn the ignition

switch to the LOCK (OFF) position.

(4) Activate the security alarm once, and then cancel it.

NOTE: Note that after erasing diagnostic trouble code
No.B120C, if the ignition switch is turned from the LOCK
(OFF) position to the ON position before activating the
security alarm, diagnosis trouble code No.B120C will be set
even though the system is normal.

(5) Turn the ignition switch from the LOCK (OFF) position to the

ON position.

(6) On completion, check that the diagnosis trouble code is not

reset.

Q: Is the DTC set?

YES : Replace the theft alarm siren.
NO : Diagnosis complete.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54A-848

DTC No.U1539 Theft alarm siren LIN checksum

CAUTION

Before replacing the ECU or sensor, ensure that the power supply circuit, the ground circuit and the
communication circuit are normal.

.

DIAGNOSTIC FUNCTION

ETACS-ECU will set diagnostic trouble code No.
U1539 when abnormal signals are received from the
theft alarm siren.

.

PROBABLE CAUSES

Faulty theft alarm siren

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 DTC 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)

P.54A-839

."

(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 siren.
NO : A poor connection, open circuit, or other intermittent

malfunctions in the LIN bus lines between the theft
alarm siren and the ETACS-ECU (Refer to GROUP
00

− How to Cope with Intermittent Malfunction

P.00-15

).

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB