Montero V6-3.8L SOHC (2005)
1. Connect the special tool. Refer to "How to connect SWS monitor". See: Reading and Clearing Diagnostic Trouble Codes/How to Connect SWS
Monitor
2. Turn the ignition switch to the "LOCK" (OFF) position.
3. Operate scan tool MB991958 according to the procedure below to display "ECU COMM CHK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."
4. Scan tool MB991958 should show "OK" on the "ECU COMM CHK" menu for the "COLUMN ECU" menu.
Q: Is "OK" displayed on the "COLUMN ECU" menu?
YES: Go to Step 2.
NO: Refer to Inspection Procedure A-2 "Communication with column switch (column-ECU) is not possible."
STEP 2. Replace the ECU.
1. Replace the column switch (lighting and turn-signal light switch).
2. If the functions, which are described in "CIRCUIT OPERATION", work normally, the input signal from the column switch (lighting and
turn-signal light switch) should be normal.
Q: Does the column switch (lighting and turn-signal light switch) send normal signal to the ECU?
YES: No action is necessary and testing is complete.
NO: Replace the ETACS-ECU. If the functions, which are described in "CIRCUIT OPERATION", work normally, the input signal from the
column switch (lighting and turn-signal light switch) should be normal.
Inspection Procedure O-7
Column Switch: ETACS-ECU does not receive any signal from windshield mist wiper switch, windshield intermittent wiper switch, windshield
low-speed wiper switch, windshield high-speed wiper switch, windshield washer switch, rear wiper switch or rear washer switch.
