Eclipse RS L4-2350cc 2.4L SOHC MFI (2002)
Connectors
CIRCUIT OPERATION
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The ETACS-ECU sends a fog light illumination request signal ("LIGHT ON" signal) to the front-ECU when the fog light switch is turned on while
the headlights are illuminating at low beam.
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Then the front-ECU switches on its relay to illuminate the fog lights.
TECHNICAL DESCRIPTION (COMMENT)
If the headlights illuminate at low beam, the fog light relay, the fog light switch, the front-ECU or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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Malfunction of the fog light relay
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Malfunction of the fog light switch
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Malfunction of the front-ECU
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Malfunction of the ETACS-ECU
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Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
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MB991223: Test Harness Set
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MB991502: Scan Tool (MUT-II)
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MB991862: SWS Monitor Kit
STEP 1. Check the headlight (low beam) operation.
Q: Do the headlights illuminate at low beam normally?
YES: Go to Step 2.
NO: Refer to Inspection Procedure J-2 "Headlights (low-beam) do not illuminate normally."
