PCM/EGR Voltage Confusion
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Racer
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PCM/EGR Voltage Confusion
Anyone out there had any experience performing the electrical tests on the EGR system ?
Here's what I found when I perform the test detailed in the shop manual.
1) The battery voltage at pin 4 and 6 is 7.5V (should be 12V) but when I rev the engine up, it blips up to 12V and back down again to 7.5V.
2) The +5V between pin 2 and 3 is not there. However there is +5V at pin 1.
3) When I applied battery voltage to pin 4 and 6, the engine did not respond but, I did here a "click" indicating the valve is opening and/or closing.
Could the manual be wrong with regard to the test results ? Or has the PCM "learned" the best EGR settings and therefore the tests yield different voltages ?
Any techs had "real" experience with this ?
smartypants
Here's what I found when I perform the test detailed in the shop manual.
1) The battery voltage at pin 4 and 6 is 7.5V (should be 12V) but when I rev the engine up, it blips up to 12V and back down again to 7.5V.
2) The +5V between pin 2 and 3 is not there. However there is +5V at pin 1.
3) When I applied battery voltage to pin 4 and 6, the engine did not respond but, I did here a "click" indicating the valve is opening and/or closing.
Could the manual be wrong with regard to the test results ? Or has the PCM "learned" the best EGR settings and therefore the tests yield different voltages ?
Any techs had "real" experience with this ?
smartypants
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