SL L4-1.9L DOHC VIN 7 (1992)
Temperature Warning Lamp/Indicator: Description and Operation
Temperature Indicator
The coolant temperature indicator lamp is pulled to ground by the powertrain control module (PCM). When the lamp is pulled to ground current from
the ignition circuit flows through the indicator lamp, allowing it to illuminate. This indicates to the vehicle's operator that the coolant temperature has
exceeded a specified temperature.
On vehicles equipped with an automatic transaxle, the coolant temperature indicator lamp is also used to indicate a possible overheat condition within
the automatic transaxle.
The coolant temperature indicator lamp is illuminated, for approximately two seconds, during engine start-up by the PCM for a bulb check.
