Mitsubishi Galant 9G. Manual — part 463

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-70

MB991223

A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set

A: Inspection harness
B: LED harness
C: LED harness adapter
D: Probe

General service tools

Checking the continuity
and measuring the
voltage at the harness
connector

MB991923
Power plant ECU check
harness

−

Measuring the terminal
voltage at the PCM

MB991658
Test harness

Tool not available

Checking throttle position
sensor

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991223

A

D

C

B

AD

MB991923

MB991658

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-71

ON-VEHICLE SERVICE

AUTO-CRUISE CONTROL SWITCH CHECK

M1172001200054

AUTO-CRUISE CONTROL MAIN SWITCH CHECK

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

combination meter illuminates when the "CRUISE" (MAIN)
switch is switched "ON".

AUTO-CRUISE CONTROL SETTING

1. Switch "ON" the "CRUISE" (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 the

arrow.

4. Check to be sure that when the switch is released the speed

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

AC206195

AC305716

AC305702

"CRUISE" INDICATOR
LIGHT

AB

AUTO-CRUISE
CONTROL SWITCH

"CRUISE"
(MAIN)
SWITCH:
"ON"

ACX01172

AD

AUTO-CRUISE CONTROL

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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 (106 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 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 (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 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 (25 mph) 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

AE

ACX01172

AD

ACX01172

AG

AUTO-CRUISE CONTROL

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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.17-74

).

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.

THROTTLE POSITION SENSOR

Refer to GROUP 13A, On-vehicle Service

− Throttle Actuator

Control Motor Check

P.13A-1134

(2.4L engine).

Refer to GROUP 13B, On-vehicle Service

− Throttle Actuator

Control Motor Check

P.13B-1187

(3.8L engine).

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

OFF

OFF

OFF

ON

ON

ON

ON

CAN

MAIN

RES

SET

2

3

MEASUREMENT

CONDITION

TERMINAL

CONNECTOR

OF TESTER

SPECIFIED

CONDITION

When brake pedal
is depressed.

1

− 2 (for stoplight

circuit)

Less than 2 ohms

3

− 4 (for

auto-cruise
control circuit)

Open circuit

When brake pedal
is not depressed.

1

− 2 (for stoplight

circuit)

Open circuit

3

− 4 (for

auto-cruise
control circuit)

Less than 2 ohms

ACX01180 AB