Toyota Reiz car door remote control failure

        Approximately 148,000 km mileage 2008 Toyota Reiz sedan. Users reflect: remote control car door can not be opened.
        Failure Analysis: First post pick fault reproduction, beginning with a remote control lock, unlock five or six times normal, and the hazard warning lights launch scanner flashing also normal. Then try again, each locking hazard warning lights flash once, when you unlock the door does not move, the hazard warning lights are not flashing, then use the mechanical key to unlock the vehicle without warning. However, when the lock with a mechanical key lock first, and then the remote control the door can be opened.
        I suspect this is the left front door lock is not in place, or lock dust, unlocking astringent lead. Remove the door clean, simultaneous measurement of the left front door lock and unlock switch only when the lock-resistance of less than 1Ω, infinite resistance when released, when you unlock renault clip the resistance less than 1Ω, normal. Lock motor resistance is normal, after loading the fault persists.
        Then re-analysis, remote unlock signal emitted, the first to go through the door control receiver receives, then the signal is sent to the right of the main body ECU, if the door control receiver fails, it will not lock the door; but now locks only normal, but sometimes also open the door, indicating that the door control receiver and the remote control should be no problem. In this regard, will focus on the right side of the main body ECU. The door is closed, press the lock button on the remote control, measuring the 9th line and body blacksmith RJ plug on the right side of the main body ECU, there is a high voltage output; When you press the unlock vcs scanner button, measuring RJ plug on the 17th line and body ride iron, no voltage output, indicating the right side of the main body ECU is faulty.
        Troubleshooting: Replace the right side of the main body ECU, troubleshooting.
        Failure revelation: Although this is a small fault, but the maintenance staff if not after careful analysis, treatment may be a little difficult, so they need to learn.
        Failure Comments: ECU problem determination, you need to pay more effort, especially in terms of determination. After all, the ECU of the failure probability is very low. Of course, if the conditions, using parts replacement method is also very good choice.
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