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Originally Posted by JustJeff
1) Clutch switch on the front of the clutch pedal was dead. I replaced that and confirmed the ECU is seeing a signal from it.
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When mines went bad, the engine tended to idle slightly higher than normal.
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2) AC relay and A/C switch both show 12V whether A/C switch is on or off
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I believe the circuit pulls to ground - the switch grounds out at the A/C compressor?
Also, I believe there's a pressure sensor switch (for safety reasons) is wired in series to the circuit...which could be the culprit?
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3) Neutral switch shows no change at ECU between Neutral and in gear...but IIRC I do not have a neutral switch on my JDM transmission.
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I know this affects the cold-start idle on initial cranking...
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4) Oxygen sensor was way off, but that might be because my engine is running really rich??It's supposed to be Idle-below 1V, Accel -.5-1V, Decel -0-.4V. Mine idled at 29.6mV, I wasn't driving with DMM on, but I throttled the pedal Accel-22mV, Decel-26mV
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This is odd, but it should not affect anything outside of slightly worse gas mileage...
It should see at least 0.5VDC at idle and decent acceleration.
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6) Full range on the TPS is definitely off by a bit. It should read .8V at idle and mine sits at .54V. Can I get some feedback on that one? On the one hand off by .26V doesn't seem bad, BUT that is a significant amount when it's 1.4 of the total spec reading.
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This might trigger one of those nasty E-OMP error codes which could trigger limp-home mode...
-Ted