Mitsubishi Eclipse. Manual - part 701

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-85

CHECK AUTO-CRUISE CONTROL-ECU TERMINALS

M1172002700289

ACX02234

TERMINAL 
NO.

CHECK ITEM

CHECK CONDITIONS

NORMAL 
CONDITION

1

Throttle position 
sensor input

When accelerator pedal is fully depressed

4.0 

− 5.5 V

When accelerator pedal is released

0.4 

− 1.0 V

2

Power train 
control module 
output (Idle 
switch) 

When accelerator pedal is depressed

4.0 

− 5.5 V

When accelerator pedal is not depressed

2.5 V or less

3

A/T control 
output

No "OD-OFF" request

Battery positive 
voltage

"OD-OFF" request

0 V

4

Stoplight switch 
input

When brake pedal is 
depressed

When stoplight 
switch is ON

Battery positive 
voltage

When brake pedal is not 
depressed

When stoplight 
switch is OFF

0 V

5

Pump power 
supply

Ignition switch: "ON" position
Stoplight switch: OFF

10 V or more

6

ECU power 
supply

Ignition switch: "ON" position

Battery positive 
voltage

7

Release valve

When decelerating with the "SET" switch while 
driving at constant speed

1 V or less

8

Control valve

10 V or more

7

Release valve

When cancelling constant speed driving with the 
"CANCEL" switch

10 V or more

8

Control valve

Battery positive 
voltage

9

Auto-cruise 
control switch 
input

When main switch is "ON"

Approximately 7.0 V

When input switch has not 
been operated

When all switches 
are OFF

3.5 

− 5.0 V

When input switch is pushed 
down

When "SET" switch 
is ON

0.4 

− 2.3 V

When input switch is pushed 
up

When "RESUME" 
switch is ON

2.3 

− 3.5 V

When input switch is pulled 
forward

When "CANCEL" 
switch is ON

0.4 V or less

10

Vehicle speed 
sensor input

When vehicle is moved 
forwards and backwards, 
sensor turns ON and OFF 
repeatedly

When sensor is ON 0 V
When sensor is 
OFF

8 

− 12 V*

11

Diagnosis control 
input

When ignition switch is "ON" position

4 V or more

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-86

NOTE: *: Auto-cruise control-ECU terminal No.10 is sending a voltage of 5 volts to the vehicle speed sensor 
system circuit. However, as higher voltage is mixed through the circuit a voltmeter will show 8 

−

 12 V.

12

ECU power 
supply

When "MAIN" switch is ON

Battery positive 
voltage

13

Clutch pedal 
position switch 
input <M/T>

When pedal is not depressed

When clutch pedal 
position switch is 
OFF

Battery positive 
voltage

When pedal is depressed

When clutch pedal 
position switch is 
ON

0 V

Transmission 
range switch 
input <A/T>

When select lever is in a 
position other than N range

When transmission 
range switch is OFF

Battery positive 
voltage

When select lever is in N range When transmission 

range switch is ON

0 V

14

Ground

At any time

0 V

15

Indicator light 
input (inside 
combination 
meter)

When indicator light is illuminated

0 V

When indicator light is switch off

Battery positive 
voltage

16

Auto-cruise 
vacuum pump 
motor input

When driving at constant 
speed using the "SET" switch

Motor 
stopped/running

Battery positive 
voltage/0 V

When accelerating with the 
"RESUME" switch while driving 
at constant speed

Motor 
stopped/running

Battery positive 
voltage/0 V

When decelerating with the 
"SET" switch while driving at 
constant speed

Motor stopped

Battery positive 
voltage

When cancelling constant 
speed driving with the 
"CANCEL" switch

Motor stopped

Battery positive 
voltage

TERMINAL 
NO.

CHECK ITEM

CHECK CONDITIONS

NORMAL 
CONDITION

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-87

ON-VEHICLE SERVICE

AUTO-CRUISE CONTROL SWITCH CHECK

M1172001100262

AUTO-CRUISE CONTROL MAIN SWITCH CHECK

1. Turn the ignition switch to the "ON" position. 
2. Check that the indicator light within the combination meter 

illuminates when the main switch is switched "ON."

Auto-cruise Control Setting

1. Switch "ON" the main switch.
2. Drive at the desired speed, above approximately 40 km/h. 

(25 mph)

3. Push the auto-cruise control switch in the direction of arrow.
4. Check to be sure that when the switch is released the speed 

is the desired constant speed.
NOTE: If the vehicles speed decreases to approximately 15 
km/h (9 mph) below the set speed because of climbing a hill 
for example, the auto-cruise control will be cancelled.

AC001491

AUTO-CRUISE
INDICATOR LIGHT

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AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-88

Speed-increase Setting

1. Set to the desired speed.
2. Push the auto-cruise control switch in the direction of arrow.
3. Check to be sure that acceleration continues while the 

switch is held, and that after it is released the constant 
speed at the time when it was released becomes the driving 
speed.
NOTE: Acceleration can be continued even if the vehicle 
speed has passed the high-speed limit [approximately 200 
km/h (124 mph)]. But the speed when the auto-cruise con-
trol switch is released will be recorded as the high-speed 
limit.

Speed-reduction Setting

1. Set to the desired speed.
2. Push the auto-cruise control switch in the direction of arrow.
3. Check to be sure that deceleration continues while the 

switch is pressed, and that after it is released the constant 
speed at the time when it was released becomes the driving 
speed.
NOTE: When the vehicle speed reaches the low limit 
[approximately 40 km/h (25 mph)] during deceleration, the 
auto-cruise control will be cancelled.

Return to the Set Speed Before Cancellation and 
Auto-cruise Control Cancellation

1. Set the auto-cruise speed control.
2. When any of the following operations are performed while at 

constant speed during auto-cruise control, check if normal 
driving is resumed and deceleration occurs.

(1) The auto-cruise control switch is pushed in the direction 

of arrow.

(2) The brake pedal is depressed.
(3) The clutch pedal is depressed. (M/T)
(4) The selector lever is moved to the "N" range. (A/T)

3. At a vehicle speed of 40 km/h (25 mph) or higher, check if 

when the "RESUME" switch is switched "ON," the vehicle 
speed returns to the speed before auto-cruise control driving 
was cancelled, and constant speed driving occurs.

4. When the main switch is turned to the "OFF" while driving at 

constant speed, check if normal driving is resumed and 
deceleration occurs. 

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ACX01172

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