AUTO-CRUISE CONTROL SYSTEM
Troubleshooting
3. CHECKING THE RESUME SWITCH CIRCUIT
Auto-cruise
control unit
control
switch
Description of operation
The set speed (before cancellation) resumes when the RE-
SUME switch is
ON, even if the constant-speed
control has been
That speed will not resume, however, even if the RESUME
switch is switched ON, if the CRUISE switch is switched OFF
and if the vehicle speed decreases to 40 km/h (25 mph) or
lower.
In addition, when the RESUME is switched ON and held
the vehicle is traveling at a constant speed, the vehicle speed
will increase; the speed at which the switch is subsequently
released will become the newly set constant speed.
Current flows to the control unit, the cruise control switch
(RESUME), and to ground.
Troubleshooting hint
5 (automatically
ECU terminal voltage
Terminal
Signal
Conditions
No.
voltage
18
RESUME
When the RESUME
OV
switch is switched
ON.
When the RESUME
Battery
switch is switched
positive
OFF.
voltaae
4. CHECKING THE VEHICLE-SPEED SENSOR CIRCUIT
Auto-cruise
control unit
Combination
meter
Junction
block
Description of operation
The vehicle-speed sensor is installed within the speedometer; it
sends to the
pulse signals that are proportional to
the
speed (i.e., the vehicle speed) of the transaxle’s
output gear.
This vehicle-speed sensor
IS
the reed switch type of sensor; it
generates four pulse signals for each rotation of the speedo-
meter’s driven gear.
Troubleshooting hint
(automatically
ECU terminal voltage
Terminal
Signal
Conditions
Terminal
No.
voltage
19
Vehicle-speed
Move the vehicle
sensor
forward slowly.
TSB Revision
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