Montero V6-3.8L SOHC (2005)
Seat Belt Warning Light Circuit Part 2
CIRCUIT OPERATION
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The ETACS-ECU operates the seat belt warning light according to the following switch signals:
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Ignition switch (IG1)
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Driver's seat belt switch
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If the driver turn the ignition switch to the "ON" position without fastening the seat belt, the seat belt warning light illuminates.
TECHNICAL DESCRIPTION (COMMENT)
If the seat belt warning light does not illuminate, the input circuit, the combination meter (seat belt warning light bulb or printed-circuit board) or the
ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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The driver's side seat belt switch may be defective
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The combination meter (seat belt warning light bulb or printed-circuit board) 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
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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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MB991822: Probe Harness
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MB991854: SWS Monitor Harness (For 13-pin)
STEP 1. Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display.
Check the ETACS-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.
