Ignition 1 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 1 voltage
is supplied to the cruise control ON switch signal terminal of the cruise
control module. If the driver has not pressed the brake pedal, ignition positive
voltage is supplied through the ABS/TCC switch, to the cruise cancel switch,
and on to the cruise control cancel signal 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 stop lamp switch signal terminal of the cruise control module.
When raising the cruise control lever, R/A (resume/accelerate) on the steering
wheel column switch, ignition positive voltage is applied to the cruise control
switch resume/accelerate terminal of the cruise control module. When lowering
the cruise control lever, Set/Coast is activated on the steering column control
switch, ignition positive voltage is applied to the cruise control set/coast
signal terminal of the cruise control module.
The cancel switch is closed under normal operating conditions. When
the driver operates the cancel switch, (pulls the cruise control lever toward
the steering wheel) the ignition positive voltage, supplied from the ABS/TCC
switch through the cruise control cancel switch, to the cancel signal terminal
of the cruise control module is opened. The cruise control module disengages
cruise operation.
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 signal terminal, sends a signal
to the Powertrain Control Module (PCM) when cruise control is engaged. The
cruise control module, cruise control cancel 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)
(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.
