Output Cycling Procedure

This series of tests can be used to determine whether faults exist between engine bay solenoids, two indicator lights, the ISC motor and the wiring or ECM.  I have successfully used it to diagnose and then solve cruise control, Torque Converter Clutch  and ISC problems.

The Cruise Control solenoid on the Cruise Control transducer which has the ball chain connected to the throttle, is continuously cycled.  It should sound like a constant chattering of the solenoid during the output cycling test, which will run for two minutes before shutting off.

The following will be cycled between their on and off modes every three second:

Coolant Light, Cruise Engage Light, TCC Solenoid, Canister Purge Solenoid, Cruise Vacuum Solenoid, Air Switching Solenoid, EGR Solenoid, Air Divert Solenoid, and the ISC will extend and retract.

In order to run the tests, we need to get the Climate Control Display (ECC panel) showing 9.5.  There are two ways to get 9.5 displayed on the panel:

1.  Use the usual method (OFF & WARMER) to display 7.0, then depress the INSTANT/AVERAGE button on the Fuel Data Display.

2.    Depress the INSTANT/AVERAGE button on the Fuel Data Display while parameter .1.3 is being displayed on the ECC.