SET-ACCEL Circuit Test

With ignition on, connect voltmeter between ground and circuit No. 151 (Light Blue/Black wire) of amplifier connector. Press ON button, then press and hold SET-ACCEL button. Voltmeter should indicate approximately 4.5 volts. Rotate steering wheel while observing voltmeter for variation. If voltage varies more than .5 volt, perform CONTROL SWITCH & CIRCUIT TEST.