Montero XLS 4WD V6-3.5L SOHC (2001)
YES: Replace the ETACS-ECU. All doors should be locked or unlocked by using the door lock key cylinder switch.
NO: Check the door lock key cylinder switch input circuit. Refer to Inspection Procedure Q-10.
STEP 3. Check the input signal (by using a voltmeter). Check the input signal from the defective door lock key cylinder 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. All doors should be locked or unlocked by using the door lock key cylinder switch.
NO: Check the door lock key cylinder switch input circuit. Refer to Inspection Procedure Q-10.
Inspection Procedure C-5
Central door locking system: All the doors do not lock with just the driver's inside lock knob lock operation
TECHNICAL DESCRIPTION (COMMENT)
The driver's door lock actuator switch or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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Malfunction of the driver's door lock actuator switch
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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 Too (MUT-II)
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MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Check method of the input signal
Q: Which is to be used, the scan tool or the voltmeter to check the input signal?
Scan tool MB991502: Go to Step 2.
Voltmeter: Go to Step 3.
STEP 2. Check the input signal (by using scan tool MB991502). Check the input signal from the driver's door lock actuator 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.
