Check The Resume Switch Circuit; Checking The Vehicle Speed Sensor Circuit - Mitsubishi 1989-1993 GALANT Service Manual

AUTO-CRUISE CONTROL SYSTEM
3. CHECKING THE RESUME SWITCH CIRCUIT
Auto-cruise
control unit
control
switch
4. CHECKING THE VEHICLE-SPEED SENSOR CIRCUIT
Auto-cruise
control unit
Combination
meter
Junction
block
Description of operation
The set speed (before cancellation) resumes when the RE-
SUME switch is swrtched ON, even if the constant-speed
control has been cancelled.
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 whi!e
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
ECU terminal voltage
Terminal
Description of operation
The vehicle-speed sensor is installed within the speedometer; it
sends to the controlunit pulse signals that are proportional to
the rotatron speed (i.e., the vehicle speed) of the transaxle's
output gear.
This vehicle-speed sensor
generates four pulse signals for each rotation of the speedo-
meter's driven gear.
Troubleshooting hint
ECU terminal voltage
Terminal
TSB Revision
Signal
No.
When the RESUME
18 RESUME
switch is switched
ON.
When the RESUME
switch is switched
OFF.
the reed switch type of sensor; it
IS
Signal
No.
19 Vehicle-speed Move the vehicle
forward slowly.
sensor
Conditions
voltage
OV
Battery
positive
voltaae
Conditions Terminal
voltage