Code 17
- Connect diagnostic readout box to engine harness connector. Place carburetor switch to open position. Turn ignition switch to the "RUN" position. Place "Read/Hold" switch in the "Hold" position. Code 55 should be on the display of the readout box.
- Connect voltmeter to the Gray wire of the dual solenoid 3-wire connector and ground. Press and hold the ATM button until test code 97 appears on the display. If voltmeter reading is pulsating and the solenoid clicking, check for a poor connection in harness circuit. If voltmeter is not pulsating but reads within one volt of battery voltage, go to step 3). If voltmeter is not pulsating but reads 0-1 volt, disconnect the computer 14-wire connector. If voltage is now within one volt of battery voltage, replace computer. If not, go to step 4).
- Check throttle control solenoid circuit. Turn ignition switch off. Disconnect computer 14-wire connector. Connect a voltmeter to cavity No. 6 of 14-wire connector and ground. Turn ignition witch to the "RUN" position. If voltmeter reads within one volt of battery voltage, voltage is okay. Replace computer. If voltage is not okay, repair wire of cavity No. 6 for an open circuit to throttle control vacuum solenoid.
- Turn ignition switch off. Disconnect dual solenoid 3-wire connector. Connect ohmmeter between Blue and Gray wires dual solenoid connector. If ohmmeter shows any resistance, check Gray wire to computer for a short to ground. If circuit is open, replace throttle control solenoid.