1993 Cadillac Deville Phantom Codes

ECM Output Cycling

This mode can be initiated after "E.9.5" is displayed on the "Fuel Data Center". The display of the "E.9.5" can be reached by depressing the Hi button while Code ".7.0" is displayed. The ECM output cycling mode, Code "E.9.6." turns the ECM's outputs on and off. To enter the output cycling mode, proceed as follows;

The engine must be running.

Turn the cruise instrument panel switch to the on position so that the cruise control outputs will cycle.

Turn the engine off and within two seconds, turn the ignition on.

Enter the diagnostics and display Code "E.9.5".

Depress the accelerator pedal (throttle switch open) and release it (throttle switch closed). The ECM output cycling mode begins as the display switches from Code "E.9.5" to Code "E.9.6."

It is possible to leave the ECM output cycling mode at any time and return to ".7.0" by clearing the ECM and BCM codes. If the display does not advance to Code "E.9.6", refer to Code "E.7.2" of the switch test.

The output cycling mode will end automatically after two minutes of cycling and the display will switch from Code "E.9.6" to Code "E.9.5".

The outputs will cycle on and off every three seconds until the two minute automatic shut off occurs. The only exception to this three second cycle is the cruise control power valve which cycles continuously. If additional output cycling is desired, recycle the throttle switch.