So, I plugged a scanner into the Escort to verify the CEL was for the codes I thought it was. Then I cleared the codes. When I was finished, the oem temp gauge was swung WAY past the max high mark and stuck there. Never seen this happen before. My gut says to disconnect the battery for a few seconds to fully de-power the gauge, to get it to "re-set" itself, but won't know until I try it. Ideas on what caused this?
Sensor grounded or something in the wiring from the gauge has?
In reply to dean1484 :
That's certainly what it acts like, like it's getting full battery voltage. Which could potentially be a big enough drain to cause a problem for a Braille battery with a reserve capacity of only 18. I just can't imagine how it could happen out of the blue. Was working perfectly, like it had for the last 15 years, then this occurs when I do a KOEOff scan and erase. Ima try unplugging the sensor and see if there is a change, that might tell me something.
Start by disconnecting the sensor and see what happens. Then report back. Is it a one or two wise sensor? Is the sensor wired directly to the gauge or does it go to the computer and then the computer controles the gauge?
1-wire, goes from the sensor to the PCM, PCM sends a PWM signal to the gauge. Unplugged sensor, no change, key on or off, engine on or off. I'm wondering if the scanner did a gauge sweep and the temp gauge needle got mechanically stuck at it's current 1/2 inch past the MAX line position.
Update. The temp gauge needle has magically unstuck itself and the thing now functions completely normally. Weirdest car thing I've seen in a long time.
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