Eclipse RS L4-2350cc 2.4L SOHC MFI (2002)
STEP 2. Check the input signal by using service data of the SWS monitor.
Turn the passing switch to the "ON" position before checking input signals from the passing switch.
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool MB991502. Also connect SWS monitor kit MB991862 after turning on scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Connect SWS monitor kit MB991862 to the column switch connector.
3. Select "COLUMN ECU" (DATA LIST), and check that normal conditions are displayed on the items described in the table.
Q: Does the scan tool display "PASSING SW" as normal condition?
YES: Replace the front-ECU. When the passing switch is turned "ON", the headlights (low-beam and high-beam) should illuminate normally.
NO: Refer to Inspection Procedure O-7 "ETACS-ECU does not receive a signal from the passing switch."
Inspection Procedure J-5
Headlight, Tail Light: Headlights do not Illuminate When the Lighting Switch is at "AUTO," "TAIL," and "PASSING" Position, but
Illuminate at Low-beam when the Switch is at "HEAD" Position. At this Position, the Headlights cannot be Changed into High Beam by
Operating the Dimmer Switch.
NOTE: This troubleshooting requires use of scan tool MB991502 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer
for to "How to use SWS monitor."
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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Malfunction of the column 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 and connectors
