[200q20v] Re: [s-cars] Inlet Air Temp code

[Bernard Littau]

Hi Taka

> I took the connector off of the sensor. I measured resistance
> across the two pins in the sensor. Then, just for kicks, I measured
> the two female sockets in the connector- that's where I got the
> 2400 ohm reading.
>
> Does this make sense? Am I looking at a bad wire now? Damn.

My sensor has a soldered connection, otherwise I'd run out and measure the
resistance to the ECU.  However, 2400 ohm going to the ECU sounds
suspicious.

I can relate that my ECU at one point was throwing Intake Temp Sensor Codes,
and was also illuminating the check engine light whenever I hit 0.8 bar.  I
had a bad connection in the wiring between Hall Sensor and ECU, so after
driving a while the connection would fail, and the resistance measured as
infinity, which is way hot air to the ECU.  Everytime I measured the Hall
Sensor, it was OK, and it was, just the connection was bad.  I removed the
existing connectors and resoldered the wires and shrink wrapped them
(eventually I shrink wrapped them, I ran with bare solder joints for a while
in the summer so I could watch the temperature :-)

Something you might test is the resistance at the ECU through the Intake
Temp Sensor.  Unplug the ECU and check pins 23 to 24 with your ohm meter on
the connector, not on the ECU.  See:
http://www.sjmautotechnik.com/pinout.html#ten

Best,

Bernard Littau
Woodinville, WA
'88 5ktq