Lancer L4-2.0L SOHC (2004)
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Driver's and passenger's door switch: OFF
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Vehicle condition
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Ignition switch: LOCK position
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Driver's and passenger's door: Closed
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When a front door is opened and closed while the sunroof timer function is on, the sunroof operative duration will be changed.
TECHNICAL DESCRIPTION (COMMENT)
Is the sunroof timer function does not work normally, the input circuits from the switches described in "CIRCUIT OPERATION", the sunroof motor
assembly, the ETACS-ECU or the SWS communication line may be defective.
TROUBLESHOOTING HINTS
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The driver's or passenger's door switch may be defective
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The sunroof motor assembly 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
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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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MB991922: Probe Harness
STEP 1. Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display.
Check the following ECUs:
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ETACS-ECU
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Sunroof motor assembly (sunroof-ECU)
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 the DLC harness before connecting the column-ECU harness. Be sure to connect SWS monitor kit
MB991862 after turning on scan tool MB991958.
