Montero XLS 4WD V6-3.5L SOHC (2001)
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 power window timer function should work normally.
NO: Check the relevant input circuit.
Inspection Procedure E-1
Keyless entry system: Keyless entry system does not operate
Receiver And Transmitter Communication Circuit
CIRCUIT OPERATION
Receiver within the ETACS-ECU receives the lock/unlock signal from the transmitter.
TECHNICAL DESCRIPTION (COMMENT)
The cause may be a malfunction of the receiver and transmitter communication system.
TROUBLESHOOTING HINTS
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Malfunction of the ETACS-ECU
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Malfunction of the transmitter
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 central door locking system operation.
Q: Does the central door locking system work normally?
YES: Go to Step 2 <when using scan tool MB991502> or 3 <when using a voltmeter>.
NO: Solve the problem first.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the transmitter switches.
