Mitsubishi 380. Manual — part 351

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-72

SPEED-INCREASE SETTING

1. Set to the desired speed.
2. Push the auto-cruise control switch in the direction of the

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 170
km/h ]. But the speed when the auto-cruise control 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 the

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 ] 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 pulled in the direction of

the arrow.

(2) The brake pedal is depressed.
(3) The selector lever is moved to the "N" range.

3. At a vehicle speed of 40 km/h or higher, check if when the

"ACC/RES" 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 "CRUISE" (MAIN) switch is turned to the "OFF"

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

ACX01172

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-73

AUTO-CRUISE CONTROL SYSTEM COMPONENT

CHECK

M1172001700316

AUTO-CRUISE CONTROL SWITCH CHECK

1. Remove the auto-cruise control switch. (Refer to

P.17-75

2. Measure the resistance between terminal 2 and terminal 3

when each of the "COAST/SET", "ACC/RES", "CANCEL"
and "CRUISE" (MAIN) switches is pressed. If measure
values measured at the time correspond to those in the table
below, the resistance values are correct.

STOPLIGHT SWITCH

1. Disconnect the connector.
2. Check for continuity between the terminals of the switch.

SWITCH POSITION

SPECIFIED CONDITION

"CRUISE" (MAIN) switch
"OFF"

Open circuit

"CRUISE" (MAIN) switch "ON" Less than 2 ohms

"CANCEL" switch ON

Approximately 100

Ω

"ACC/RES" switch ON

Approximately 887

Ω

"COAST/SET" switch ON

Approximately 300

Ω

1 2 3

AC203822AB

OFF

CAN

MAIN

RES

SET

MEASUREMENT
CONDITION

TERMINAL
CONNECTOR
OF TESTER

SPECIFIED
CONDITION

When brake pedal
is depressed.

− 2 (for

stoplamp circuit)

Less than 2 ohms

− 4 (for

auto-cruise
control circuit)

Open circuit

When brake pedal
is not depressed.

− 2 (for

stoplamp circuit)

Open circuit

− 4 (for

auto-cruise
control circuit)

Less than 2 ohms

ACX01180AB

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-74

THROTTLE POSITION SENSOR

Refer to GROUP 13A, On-vehicle Service

− Throttle Actuator

Control Motor Check

13A-671

(3.8L engine).

WARNING

If the air intake duct is removed from the throttle
body take great care to keep fingers away from the
throttle plate. The drive motor has very high torque
and is capable of random movement at any time. Do
not under any circumstance activate the throttle plate
by hand.
When removing the throttle body from the intake
manifold disconnect the wiring first.During replace-
ment connect the wiring last.
Do not activate the throttle body using a DC supply to
test the motor, as permanent damage to the throttle
body will result.

TRANSMISSION INHIBITOR SWITCH ("N"
POSITION)

Refer to GROUP 23A, On-vehicle Service

− Essential Service

P.23A-294