09 Yaris Heater blower problem - Toyota Yaris Forums

motoxxx3 · 10-15-2010, 06:45 AM

No the headlights and all dashboard lights do not dim. However the interior lamp does dim in sync with the blower speed slowing down.
The tech told me the ECU sends a signal to boost alternator output when the lights are turned on, but it does not send a signal when the blower is turned on. This explains why the problem does not occur when the lights are turned on.
I have myself now checked a couple of 1.0 T2 Yaris and they do it also.
The 1.0 & 1.33 TR versions WITH aircon do not do it.
I totally agree with your comment about the Japanese built Yaris. They are sure to be better quality. The French built ones we have in Europe have VALEO electronics, which have a bad reputation. The Jap ones probably have Hitachi, Denso or Toshiba electronics.

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10-15-2010, 06:45 AM	#25
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	No the headlights and all dashboard lights do not dim. However the interior lamp does dim in sync with the blower speed slowing down. The tech told me the ECU sends a signal to boost alternator output when the lights are turned on, but it does not send a signal when the blower is turned on. This explains why the problem does not occur when the lights are turned on. I have myself now checked a couple of 1.0 T2 Yaris and they do it also. The 1.0 & 1.33 TR versions WITH aircon do not do it. I totally agree with your comment about the Japanese built Yaris. They are sure to be better quality. The French built ones we have in Europe have VALEO electronics, which have a bad reputation. The Jap ones probably have Hitachi, Denso or Toshiba electronics.