Starting System: Description and Operation

SYSTEM DESCRIPTION
Refer to Owner's Manual for ASCD operating instructions.
When the ignition switch is in the ON or START position, power is supplied:
- through 1OA fuse (Letter [t], located in the fuse block)
- to the ASCD main switch terminal 1 and
- to the ASCD hold relay terminal 5.
When the ASCD main switch is in the ON position, power is supplied:
- from terminal 2 of the ASCD main switch
- to ASCD control module terminal 4, and
- from terminal 3 of the ASCD main switch
- to ASCD hold relay terminal 1.
Ground is supplied:
- to ASCD hold relay terminal 2
- through body grounds E7, E41 and E61.
With power and ground supplied, the ASCD hold relay is energized, and power is supplied:
- from terminal 3 of the ASCD hold relay
- to ASCD control module terminal 4 and
- to inhibitor relay terminal 4.
Power remains supplied to the ASCD control module terminal 4 when the ASCD switch is released to the N (neutral) position. Ground is supplied:
- to ASCD control module terminal 3
- through body grounds M5 and M75.

INPUTS

At this point, the system is ready to activate or deactivate, based on inputs from the following:
- speedometer in the combination meter
- stop lamp switch
- ASCD steering switch
- inhibitor relay
- ASCD cancel switch.
A vehicle speed input is supplied:
- to ASCD control module terminal 7
- from terminal 31 of the combination meter.
Power is supplied at all times:
- to stop lamp switch terminal 1
- through 15A fuse (Letter [X], located in the fuse block).
With the brake pedal depressed, power is supplied:
- from terminal 2 of the stop lamp switch
- to ASCD control module terminal 11.
Power is supplied at all times
- through 15A fuse (Letter [r], located in the fuse block)
- to horn relay terminal 2
- through terminal 1 of the horn relay
- to ASCD steering switch terminal 1.
When the SET/COAST button is depressed, power is supplied:
- from terminal 2 of the ASCD steering switch
- to ASCD control module terminal 2.
When the RESUME/ACCEL button is depressed, power is supplied:
- from terminal 3 of the ASCD steering switch
- to ASCD control module terminal 1.
When the CANCEL button is depressed, a 5V signal is supplied:
- to ASCD control module terminals 1 and 2.
When the system is activated, power is supplied:
- to ASCD control module terminal 5.
Power is interrupted when:
- the shift lever is placed in P or N, or
- the brake pedal is depressed.

OUTPUTS

The ASCD actuator controls the throttle drum via the ASCD wire based on inputs from the ASCD control module. The ASCD actuator consists of a vacuum motor, an air valve, and a release valve. Power is supplied:
- from terminal 8 of the ASCD control module
- to ASCD actuator terminal 1.
Ground is supplied to the vacuum motor:
- from terminal 9 of the ASCD control module
- to ASCD actuator terminal 4.
Ground is supplied to the air valve:
- from terminal 10 of the ASCD control module
- to ASCD actuator terminal 2.
Ground is supplied to the release valve:
- from terminal 14 of the ASCD control module
- to ASCD actuator terminal 3.
When the system is activated, power is supplied:
- from terminal 13 of the ASCD control module
- to the combination meter terminal 1 and
- to A/T control unit terminal 37
Ground is supplied:
- to combination meter terminal 12
- through body grounds M5 and M75.
With power and ground supplied, the CRUISE indicator illuminates. When the RESUME/ACCEL button is depressed, a signal is sent:
- from terminal 12 of the ASCD control module
- to A/T control unit terminal 40.
When this occurs, the A/T control unit cancels overdrive.