Lancer L4-2.4L SOHC (2005)
Light Reminder Tone Alarm Function
CIRCUIT OPERATION
The ETACS-ECU operates the light reminder tone alarm function intermittently according to the following signals:
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Ignition switch (IG1): OFF
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Door switch (front: LH): ON
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Headlight switch: ON
The ETACS-ECU operates the light reminder tone alarm function intermittently under the following conditions.
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Ignition switch: "LOCK" position (key removed)
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Driver's door: OPEN
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Lighting Switch: Tail or Head position
TECHNICAL DESCRIPTION (COMMENT)
If the function does not work normally, the input circuit system from the switches or the ETACS-ECU may be defective (refer to "CIRCUIT
OPERATION").
TROUBLESHOOTING HINTS
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The front door switches may be defective
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The column switch (turn-signal light and lighting switch) 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
STEP 1. 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
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.
