Montero XLS 4WD V6-3.5L SOHC (2001)
If the turn-signal lights do not flash, a defect in the ETACS-ECU power supply line specific to the turn-signal lights is suspected.
NOTE: If only one of the turn-signal lights does not flash, the light bulb may be burned out or the harness wires between the ETACS-ECU and the light
may be defective. In this case, check the circuit by referring to Turn-signal Light and Hazard Warning Light.
TROUBLESHOOTING HINTS
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Malfunction of the hazard warning light 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 turn-signal light operation.
Q: Do the turn-signal lights work normally?
YES: Go to Step 2 <when using scan tool MB991502> or 3 <when using a voltmeter>.
NO: Solve the problem first. Refer to Inspection Procedure M-1.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the hazard warning 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 hazard warning lights should flash normally.
NO: Check the hazard warning light switch input circuit. Refer to Inspection Procedure Q-4.
STEP 3. Check the input signal (by using a voltmeter).
Check the input signals from the hazard warning light switch.
