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#1 | |
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School'er of hard knocks
Drives: Silver Yaris 4dr. HB Join Date: Oct 2008
Location: Sudbury, On
Posts: 556
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Quote:
![]() ![]() ![]() ![]() ![]() I liked your first reason better. ![]() I figured as much. I'm perplexed as to how this thing works, I mean, internally to the ECU. How does it recognize the difference between on-off, set-resume with just one wire (ground doesn't count)?
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#2 | |
![]() ![]() ![]() ![]() ![]() ![]() ULTIMATEDrives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,450
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Quote:
The wire to the ECM is being looked at with respect to ground. The ECM measures the voltage drop on the pin, which varies from 12V (with no buttons pressed) down to 0V, when the on/off button is pressed. The resistors between the other switches produce voltage drops between the two end points. |
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