Lancer L4-2.4L SOHC (2005)
TECHNICAL DESCRIPTION (COMMENT)
If the headlights illuminate at low-beam regardless of the lighting switch positions, the headlight operation is in fail-safe mode.
TROUBLESHOOTING HINTS
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The column switch may be defective
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The front-ECU may be defective
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The ETACS-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB991958: Scan Tool (MUT-III Sub Assembly)
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MB991824: Vehicle Communication Interface (V.C.I.)
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MB991827: MUT-III USB Cable
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MB991911: MUT-III Main Harness B
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MB991813: SWS Monitor Kit
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MB991806: SWS Monitor Cartridge
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MB991812: SWS Monitor Harness (For Column-ECU)
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MB991922: Probe Harness
Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display.
Check the following ECUs:
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ETACS-ECU
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Column-ECU
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Front-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. Connect the DLC harness before connecting the column-ECU harness. Be sure to connect SWS monitor kit
MB991813 after turning on scan tool MB991958.
