Note On Intermittents
WARNING: This page is about a different car, the 1989 Cadillac Fleetwood and 1989 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Manipulate circuits No. 472 and 469 wiring, MAT connector, and ECM connector while observing ECM parameter P.0.5. If failure is induced, MAT will jump from its normal value to open signal circuit reading of -26 to -40°F (-32 to -40°C).