Montero XLS 4WD V6-3.5L SOHC (2001)
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 seat belt tone alarm function should work normally.
NO: Check the relevant input circuit.
STEP 3. Check the input signal (by using a voltmeter). Check the input signals from the following switches:
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Ignition switch (IG1)
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Driver's seat belt switch
1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
2. Check that the voltmeter indicator deflects once when the input signal enters.
Q: Does the voltmeter indicator deflect?
YES: Replace the ETACS-ECU. The seat belt tone alarm function should work normally.
NO: Check the relevant input circuit.
Inspection Procedure B-4
Tone alarm: RV meter operation tone alarm function does not work normally
TECHNICAL DESCRIPTION (COMMENT)
If the RV meter is operating normally, the cause is probably a malfunction in the harness between the RV meter and the ETACS-ECU or in the
ETACS-ECU itself.
TROUBLESHOOTING HINTS
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Malfunction of the RV meter
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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 operating condition of RV meter.
Q: Is the RV meter operating normally?
