Eclipse L4-2.4L (4G69) (2008)
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NOTE: This troubleshooting procedure requires the use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS
monitor, refer to "How to use SWS monitor." See: Scan Tool Testing and Procedures/How to Use SWS Monitor
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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Door switch (LH): ON
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Taillight 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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Taillights or headlights: on
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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Trouble in input signal system
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
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The front-ECU may be defective
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra Fine Probe
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MB991958: Scan Tool (M.U.T.-III Sub Assembly)
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MB991824: V.C.I.
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MB991827: M.U.T.-III USB Cable
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MB991910: M.U.T.-III Main Harness A
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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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MB991822: Probe Harness
Check the input signal by using "DATA LIST" 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"
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 MB991910 before connecting special tool MB991812. Be sure to connect special tool
MB991806 after turning on special tool MB991824.