Montero V6-3.8L SOHC (2005)
Ignition Switch (IGI) Input Circuit
CIRCUIT OPERATION
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The ETACS-ECU operates the following equipment or functions according to signal from the ignition switch (IG1):
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Ignition key reminder tone alarm function
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Light reminder tone alarm function
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Seat belt tone alarm function
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Power window timer function
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Seat belt warning light
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Headlight automatic shutdown function
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Turn-signal light
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Dome light dimming function
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If the power supply circuit from the battery to the ETACS-ECU is open, this circuit is used as backup circuit.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the equipment or functions, which are described in "CIRCUIT OPERATION", do not work normally.
TROUBLESHOOTING HINTS
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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