Montero Sport XS 2WD V6-3.5L SOHC (2001)
following switches:
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Ignition switch (IG1)
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Key reminder switch
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Door switches
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Driver's door lock actuator switch
If the dome light and cargo space light does not be dimmed normally, the relevant input signal circuit or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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Malfunction of the key reminder switch
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Malfunction of the door switches.
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Malfunction of the driver's door lock actuator 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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MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Check the ETACS-ECU power supply circuit. Do all of the following functions work when the ignition switch is turned to the
"LOCK" (OFF) position?
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Ignition key reminder tone alarm function
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Light reminder tone alarm function
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Central door locking system
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Ignition key hole illumination light
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Theft-alarm system
Q: Do any of the functions work?
YES: Go to Step 2 <when using scan tool MB991502> or 3 <when using a voltmeter>.
NO: Check the ETACS-ECU battery circuit.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the following switches:
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Ignition switch (IG1)
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Key reminder switch
-
All door switch
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Liftgate switch
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.
Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters?
YES: Replace the ETACS-ECU. The dome light and cargo space light dimming function should work normally.
