Mitsubishi Galant 9G. Manual - part 463

AUTO-CRUISE CONTROL

TSB Revision

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

TSB Revision

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

TSB Revision

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

TSB Revision

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