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I have a 2003 Prado 120 Grande 4.0 petrol. I attached another light bar today and in doing so I had to disconnect the battery. After i had reconnected everything the VSC TRC and VSC OFF lights are illuminated on the dash. The engine also idled roughly (Approximately 400rpm where it usually idles at 600-1000rpm). The idle problem seems to have resoleved itself however. I have check the fuses and they all seem to be fine. Has anyone experienced this before or know of a fix for it? If so that would be gratefully appreciated.
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Did you engage the centre diff lock switch? -
I tried engaging and disengaging the centre diff lock but that made no difference.Comment
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Is the check engine light on?Comment
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No. The check engine light is off. It is just the VSC TRC and VSC OFF lights that are on.Comment
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Very rarely a v6 4.0 will start and idle rough. I've had a few that do it. It clears after a restart or a few revs.
If you get certain electronic faults. (Usually with a check engine light on as well) the vsc/ trc etc lights illuminate.
It's known as the xmas tree lights. It's a program in the main ecu that shuts those systems down incase they are causing issues.
May not be the problem with yours. I'd suggest getting something plugged in to read any error codes. Might shed some light.Comment
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The idle is smooth again. I'll get my mechanic to have a look at it. It is due for a service anyway. Thanks for the suggestion.Comment
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I usually get low idle (to the point of nearly stalling) every time I disconnect the battery for an extended period of time. It's like the ECU is relearning the air/fuel mixture or something.Comment
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Yeah. That's exactly what happened. I had to put it into neutral at the lights and apply some throttle at traffic lights when I was getting it home. But it's working now.Comment
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It ended up needing to go to an auto electrician. Turns out 9 wires were damaged (I'm yet to get details, they may be unrelated to the light bar installation.) Finally it is fixed.Comment
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