Montero XLS 4WD V6-3.5L SOHC (2001)
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Ignition switch (IG1)
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Turn-signal light 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 turn-signal lights should flash normally.
NO: Check the relevant input signal circuit.
STEP 9. 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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Turn-signal light 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 turn-signal lights should flash normally.
NO: Check the relevant input signal circuit.
Inspection Procedure M-2
Flasher timer: Hazard warning lights does not flash when the hazard warning light switch is turned on
Turn-signal Light Drive Circuit
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Refer to Inspection Procedure M-1.
CIRCUIT OPERATION
If the ETACS-ECU receives a signal from the hazard warning light switch, the flasher timer circuit (which is incorporated in the ETACS-ECU) makes
the turn- signal lights flash.
TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU makes the turn-signal lights flash, based on the input signals from the hazard warning light switch. If the turn-signal lights do not flash
normally, the hazard warning light switch input circuit or the ETACS-ECU may be defective.
