Eclipse L4-2.4L SOHC (2004)
Headlight Automatic Shutt-down Function
CIRCUIT OPERATION
The ETACS-ECU operates the headlight automatic shutdown function according to the following signals:
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Ignition switch (IG1): OFF
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Driver's door switch: ON
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Tail light switch: ON
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Headlight switch: ON
The ETACS-ECU operates the headlight automatic shutdown function under the following conditions:
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Ignition key: Other than "ON" position
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Driver's door: open
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Tail light or headlight: Illuminating
TECHNICAL DESCRIPTION (COMMENT)
If the function does not work normally, the input circuit system from the switches, the ETACS-ECU or the front-ECU may be defective (refer to
"CIRCUIT OPERATION").
TROUBLESHOOTING HINTS
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Malfunction of the driver's door switch
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Malfunction of the column switch (turn-signal light and lighting switch)
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Malfunction of the ETACS-ECU
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Malfunction of the front-ECU
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Damaged harness wires or connectors
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: Vehicles communication interface
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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
Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.
Check the input signals from the following switches:
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Ignition switch: "ON" to "OFF"
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Lighting switch: "TAIL" or "HEAD"
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Driver's and front passenger's door: closed
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 special tool MB991911 before connecting special tool MB991812. Be sure to connect special tool
MB991806 after turning on special tool MB991824.
