Montero LTD 4WD V6-3.5L SOHC (2002)
Simplified Wiring System: Initial Inspection and Diagnostic Overview
Before Carrying Out Troubleshooting
Before carrying out troubleshooting, check the following two items.
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Make sure that the ETACS-ECU, the junction block (J/B), the front-ECU and the engine compartment relay box are connected securely.
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Make sure that fuses and fusible links related to relevant systems are not blown.
How to Cope With Intermittent Malfunctions
Most intermittent malfunctions occur under certain conditions. If those conditions can be identified, the cause will be easier to find.
TO COPE WITH INTERMITTENT MALFUNCTION;
1. Ask the customer about the malfunction
Ask what it feels like, what it sounds like, etc. Then ask about driving conditions, weather, frequency of occurrence, and so on.
2. Determine the conditions from the customer's responses
Typically, almost all intermittent malfunctions occur from conditions like vibration, temperature and/or moisture change, poor connections. From
the customer's replies, it should be reasoned which condition is influenced.
3. Use simulation test
In the cases of vibration or poor connections, use the simulation tests below to attempt to duplicate the customer's complaint. Determine the most
likely circuit(s) and perform the simulation tests on the connectors and parts of that circuit(s). Be sure to use the inspection procedures provided
for diagnostic trouble codes and trouble symptoms.
For temperature and/or moisture conditions related intermittent malfunctions, using common sense, try to change the conditions of the suspected
circuit components, then use the simulation tests below.
4. Verify the intermittent malfunction is eliminated
Repair the malfunctioning part and try to duplicate the condition(s) again to verify the intermittent malfunction has been eliminated.
