[Shotimes] EATC Question

van Oss van Oss" <vanOss@centurytel.net
Sat, 25 Jan 1997 19:57:11 -0600


You have a problem with the CELO (cold engine lock-out) switch.

The SHO has three different devices for evaluating coolant temp.  From fore to aft, they are:  (1) the variable sender for the dash
gauge, (2) the on/off switch that tells the PCM when the engine has warmed up, and (3) the on/off switch that tells the ETAC when
the engine has warmed up (CELO).

Our heater tubes are a mix of rubber, steel, and rubber.  The CELO switch is mounted on the steel portion of one of the heater
tubes.

On my 91, that steel portion was shot, so I went with a longer, rubber tube.  I ditched the CELO switch, so its connector now
dangles.  When I drive in winter, the ETAC thinks the engine is warm, so it turns on full blast when I start the car.  In a car with
a functioning CELO switch, the ETAC chills out (pun intended) until the engine has warmed up enough to move the CELO switch.

Joseph

----- Original Message -----
Which temperature sensor is it that keeps the EATCblower from turning on until
the engine starts to warm up?  and where is it located?
Jim
with a blower that starts as soon as you start the car
Brrrrrrr!