Lancer L4-2.4L SOHC (2005)
All Door Switches Input Circuit Part 2
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or systems according to signal from the driver's or front passenger's, rear or back door switches:
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Light reminder tone alarm function <Driver's door switch>
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Power window timer function <Driver's, front passenger's door switch>
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Headlight automatic shutdown function <Driver's door switch>
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Keyless entry system <All door switches>
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Dome light <All door switches>
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems, which are described in "CIRCUIT OPERATION", do not work normally. If the signal is not normal,
the driver's, front passenger's, rear or back door switch or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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The driver's, front passenger's, rear or back door switch may be defective
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The ETACS-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
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: Vehicle Communication Interface (V.C.I.)
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MB991827: MUT-III USB Cable
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MB991911: MUT-III Main Harness B
STEP 1. Check which door switch is defective.
Q: Which door switch signal is not entered?
Driver's or front passenger's door : Refer to Inspection Procedure M-4 "ETACS-ECU does not receive any signal from the driver's or the front
passenger's door switch."
Rear door (LH) : Go to Step 2.
Rear door (RH) : Go to Step 7.
