Montero XLS 4WD V6-3.5L SOHC (2001)
TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU illuminates the ignition key hole illumination light according to the input signals from the following switches:
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Ignition switch (IG1)
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Key reminder switch
-
Driver's door switch
If the ignition key hole illumination light does not illuminate, the relevant input signal circuit, the key reminder switch (ignition key hole illumination
light bulb) or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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Malfunction of the driver's door switch
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Malfunction of the key reminder switch (key reminder switch or ignition key hole illumination light bulb)
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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.
If the ignition switch is at the "LOCK" (OFF) position, do all of the following functions operate?
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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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Hazard warning light
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Dome light dimming function
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Theft-alarm system
Q: Does any function described above operate?
YES: Go to Step 2 <when using scan tool MB991502> or 3 <when using a voltmeter>.
NO: Check the ETACS-ECU battery circuit. Refer to Inspection Procedure R-1.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the following switches:
-
Ignition switch (IG1)
-
Key reminder switch
-
Driver's door 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?
