Montero XLS 4WD V6-3.5L SOHC (2001)
Receiver And Transmitter Communication Circuit
CIRCUIT OPERATION
The ETACS-ECU receives an input signal from the transmitter through its built-in receiver, and evaluates the signal to operate various functions.
TECHNICAL DESCRIPTION (COMMENT)
The transmitter input signal is used to operate the following systems:
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Keyless entry system
-
Theft-alarm system
If the signal fails, these systems will not work normally.
TROUBLESHOOTING HINTS
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Malfunction of the transmitter
-
Malfunction of the ETACS-ECU
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. Register the transmitter.
Register the transmitter (Refer to Keyless Entry System - On-vehicle Service - Encrypted Code Registration Method.)
Q: Is the transmitter registered successfully?
YES: The transmitter input signal should be able to be checked and the functions, which are described in the "Technical Description (comment),"
should work normally.
NO: Go to Step 2.
STEP 2. Check the transmitter battery.
Measure the transmitter battery's voltage.
Q: Is the voltage approximately 2.5 - 3.2 volts?
