Ignition positive voltage is supplied from the cruise fuse,
to the cruise control module. The cruise control module is grounded to the
chassis. When the cruise control ON/OFF switch is on, ignition positive
voltage is supplied to the cruise on/off terminal of the cruise control module.
If the driver has not pressed the brake pedal, ignition positive voltage is
supplied through the cruise control brake release switch, to the cruise release
terminal of the cruise control module. When the driver presses the brake pedal,
battery positive voltage is supplied from the stop lamp fuse, through
the closed stop lamp switch to the brake signal input terminal of the cruise
control module. When pressing R/A (resume/accelerate) on the control switch,
ignition positive voltage is applied to the resume/accelerate terminal of
the cruise control module. When the Set/Coast is pressed on the control
switch, ignition positive voltage is applied to the set/coast terminal of
the cruise control module.
The cruise control module receives a vehicle speed signal input from
the Powertrain Control Module (PCM). In operation, the voltage varies between
0 V and 5 V.
The cruise control module, cruise engaged output terminal, sends a signal
to the Powertrain Control Module (PCM) when cruise control is engaged. The
cruise control module, cruise inhibit input terminal, is a circuit used by
the PCM to inhibit cruise control when conditions inconsistent with cruise
operation are present.
The PCM will inhibit cruise control:
| • | When vehicle speed is less than 40 Km/h (25 mph). |
| • | When PARK, REVERSE, NEUTRAL, or 1st gear is indicated by
the transaxle range switch. |
| • | With high engine RPM (fuel cut-off) |
| • | When vehicle speed is too high. |
| • | When an over or undercharged battery voltage condition exists. |
| • | Antilock brake system/traction control system is active for more
than 2 seconds. |
If the PCM determines that any of the cruise control inhibit conditions
are present, the PCM requests that the cruise control module disengage cruise
control. The PCM accomplishes this request by opening the cruise inhibit output
circuit. If the cruise engage output signal, sent by the cruise control module
to the PCM, indicates that the cruise control is still engaged after the
PCM has requested that cruise control disengage, the PCM sets a DTC.
