Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2011OUTLANDER SPORT AWD L4-2.0L (4B11)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONU CODE CHARTSU1540LOCAL INTERCONNECT NETWORK (LIN)
2011 Mitsubishi Outlander Sport AWD L4-2.0L (4B11)
Local Interconnect Network (LIN)
2011 Mitsubishi Outlander Sport AWD L4-2.0L (4B11)SECTION Local Interconnect Network (LIN)
DTC No.U1540 Theft-alarm SENSOR. LIN checksum [Vehicles with theft-alarm sensor]
CAUTION:
Before replacing the ECU or sensor, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
TROUBLE JUDGMENT
The ETACS-ECU will set diagnostic trouble code No. U1540 when abnormal signals are received from the theft-alarm sensor.
TROUBLESHOOTING HINTS
Faulty theft-alarm sensor
DIAGNOSIS
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 connecting or disconnecting scan tool MB991958.
(1)Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."
(2)Erase the DTC.
(3)Turn the ignition switch to the "ON" position.
(4)Check if the DTC is set.
(5)Turn the ignition switch to the "LOCK" (OFF) position.
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 How to Cope With Intermittent Malfunctions).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.