Montero V6-3.8L SOHC (2005)
TROUBLESHOOTING HINTS
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The column switch (turn-signal light and lighting switch) may be defective
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The front-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB991958: Scan Tool (MUT-III Sub Assembly)
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MB991824: Vehicle Communication Interface (V.C.I.)
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MB991827: MUT-III USB Cable
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MB991911: MUT-III Main Harness B
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MB991813: SWS Monitor Kit
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MB991806: SWS Monitor Cartridge
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MB991812: SWS Monitor Harness (For Column-ECU)
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MB991822: Probe Harness
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MB991854: SWS Monitor Harness (For 13-pin)
STEP 1. Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display.
Check the following ECUs:
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Column-ECU
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Front-ECU
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool MB991958.
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" menus for both the "COLUMN ECU" and the "FRONT ECU" menus.
Q: Is "OK" displayed on both the "COLUMN ECU" and "FRONT ECU" menus?