Lancer LS L4-2.0L SOHC (2002)
NOTE: This troubleshooting requires use of scan tool MB991502 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer
to "How to use SWS monitor".
CIRCUIT OPERATION
The ETACS-ECU operates the interior light automatic shutdown function according to the following switch signals:
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Ignition switch (ACC)
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Ignition switch (IG1)
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Front door switch (LH)
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All door switches
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Multi-purpose fuse No. 17-loaded signal
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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Malfunction of the door switch
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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 configuration function.
Q: Is the interior light automatic shutdown function enabled by the adjustment function?
YES: Go to STEP 2.
NO: Enable the interior light automatic shutdown function by using the adjustment function. Check that the interior light automatic shutdown function
works normally.
STEP 2. Check the front dome light and the rear dome light.
If the front dome light switch and the rear dome light switch are moved to the "door interlock position", the front dome light and the rear dome light
should illuminate when either door is opened.
Q: Do the front dome light and the rear dome light illuminate normally?
Both the front dome light and the rear dome light illuminate normally. : Go to Step 3.
Neither the front dome light nor the rear dome light illuminates normally. : Refer to Inspection Procedure K-1 "Front dome light, rear dome light and
luggage compartment light do not illuminate or go out normally"
Either the front dome light or the rear dome light illuminates normally. : Refer to Inspection Procedure K-2 "Front dome light, rear dome light or
luggage compartment light do not illuminates or goes out normally."