Test SP-14A, Checking For Intermittent Faults

Reconnect and reassemble all previously tested components. Connect DRB-II to engine diagnostic connector so DRB-II display can be seen from driver's seat. Road test vehicle. Using DRB-II, read cutout monitor on DRB-II display. If DRB-II display shows erratic vehicle speed, replace distance sensor. Perform VERIFICATION TEST SP-VER .

If DRB-II display does not show erratic vehicle speed, put cruise control ON/OFF switch in ON position. With vehicle speed at a minimum of 35 MPH, press and release cruise control set switch. If DRB-II display shows S/C DENIED, see appropriate DENIED MESSAGE in DRB-II INTERMITTENT FAULT MESSAGES and correct problem as necessary.

DRB-II INTERMITTENT FAULT MESSAGES

Denied Message	Problem To Correct
BRAKE	Open Circuit At Terminal No. 29 At SBEC
CLUTCH	RPM/Vehicle Speed Ratio Is Not Constant
ON/OFF	Lack Of Voltage At Terminal No. 23 Or No. 49 At SBEC
P/N	Ground Exists At Terminal No. 30 At SBEC
RPM/SPD	RPM/Speed Ratio Is Not Constant
SPEED	Vehicle Speed As Read By Distance Sensor Is Less Than 35 MPH
RPM	Engine RPM Is Excessively High
SOL/FLT	Fault In Servo Vent Or Vacuum Solenoid Circuit That Is Either Maturing Or Set

If DRB-II display shows S/C ALLOWED and cruise control is operative, perform the following:
- Check for cruise control disengagement without driver command by driving vehicle under various road conditions.
- If cruise control disengages without driver command, read cutout monitor S/C DENIED message on DRB-II display. See appropriate DENIED MESSAGE in DRB-II INTERMITTENT FAULT MESSAGES and repair as necessary.
- If cruise control does not disengage without driver command, read cutout monitor on DRB-II display. Compare GOAL value with SPEED value. If values are not within 2 MPH of each other, replace SBEC.