Montero V6-3.8L SOHC (2005)
STEP 1. Register the transmitter.
Replace the transmitter. Refer to passenger's Keyless Entry System, On-vehicle Service, How to register secret code.
Q: Can the transmitter be registered correctly?
YES: If the systems, which are described in "CIRCUIT OPERATION", work normally, the input signal from the transmitter should be normal.
NO: Go to Step 2.
STEP 2. Check the transmitter battery.
Measure the voltage of the transmitter battery.
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The voltage should equal approximately 2.5 - 3.2 volts.
Q: Is the measured voltage approximately 2.5 - 3.2 volts?
YES: Go to Step 3.
NO: Replace the battery. If the transmitter can be registered normally, and the systems, which are described in "CIRCUIT OPERATION", operate
normally, it indicates that the transmitter is sending normal signal to the ECU.
STEP 3. Check the transmitter.
Substantial other transmitter in order to register encrypted code. Refer to passenger's Keyless Entry System, On-vehicle Service, How to register secret
code.
Q: Can the transmitter be registered correctly?
YES: If the systems, which are described in "CIRCUIT OPERATION", work normally, the input signal from the transmitter should be normal.
NO: Replace the ETACS-ECU. If the systems, which are described in "CIRCUIT OPERATION", work normally, the input signal from the transmitter
should be normal.
How to Check ECUs
HOW TO CHECK ECUs
1. Use the scan tool MB991958 (MUT-III Sub Assembly) and the SWS monitor kit to check ECUs. (Refer to MUT-III Operating Instructions)
