engine MITSUBISHI 380 2005 Workshop Manual

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-66
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 move-
ment at any time. Do not under any circumstances activate the throttle plate by hand.
When removing the throttle body from the intake manifold disconnect the wiring first. During
replacement connect the wiring last.
Do not activate the throttle body using a DC suppy to test the motor,as permanent damage to
the throttle body will result.
TP
SNSR(MAIN)13 Throttle position sensor
(main)*(1) Accelerator pedal:
Released
(2) Accelerator pedal:
Depressed(1) Throttle
valve fully
closed1035 1250 mV
(2) Throttle
valve fully
open4,000 mV or more
A/C switch: "OFF" to "ON" Voltage rises
Selector lever: "N" to "D" Voltage rises
VSS 04 Vehicle speed signal Road test the vehicle The speedometer
and Diagnostic
Tool MB991958
display the same
value. MUT-III
Diagnostic
To o l
DISPLAYITEM
NO.INSPECTION ITEM INSPECTION REQUIREMENT NORMAL
CONDITION

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-67
ENGINE ECU TERMINAL VOLTAGE REFERENCE CHART FOR AUTO-CRUISE
CONTROL SYSTEM OPERATION
M1172004800055
1. Disconnect the Engine ECU connectors B-20,
B-21, and connect special tool MB992044
(ENGINE ECU check harness) in between.2. Measure the voltages between the check
connector terminals of special tool MB992044 and
ground connector B-21 terminals 4 or 6.
TERMINAL
NO.CHECK ITEM CHECK CONDITION NORMAL
CONDITION
18 (B-21) Stoplamp switch Ignition
switch:
"ON"Depress the brake pedal. Battery positive
voltage
Release the brake pedal. 1V or less
14 (B-21) Auto-cruise control
switch power supplyIgnition
switch:
"ON"All switches: OFF 4.7
5.0 V
"CRUISE" (MAIN) switch: "ON" 0
0.3 V
"COAST/SET" switch: ON 2.0
2.8 V
"ACC/RES" switch: ON 3.3
4.1 V
"CANCEL" switch: ON 0.8
1.5 V
76 (B-21) Accelerator pedal
position sensor (sub)
power supplyIgnition switch: "ON" 4.9
5.1 V
59 (B-21) Accelerator pedal
position sensor
(main)Ignition
switch:
"ON"Release the accelerator pedal
0.435
1.035 V
Depress the accelerator pedal. 4.0 V or more
81 (B-21) Accelerator pedal
position sensor (sub)Ignition
switch:
"ON"Release the accelerator pedal
0.435
1.035 V
Depress the accelerator pedal. 4.0 V or more
75 (B-21) Accelerator pedal
position sensor
(main) power supplyIgnition switch: "ON" 4.9
5.1 V
21 (B-21) Brake switch Ignition
switch:
"ON"Depress the brake pedal. 1V or less
Release the brake pedal. 1V or less
9 (B-20) Transmission inhibitor
switch: "P" and "N"
Crank switch signalIgnition
switch:
"ON"Transmission inhibitor switch: "P" or
"N" Crank switch signalBattery positive
voltage
Transmission inhibitor switch: Other
than above1V or less

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-68
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 move-
ment at any time. Do not under any circumstances activate the throttle plate by hand.
When removing the throttle body from the intake manifold disconnect the wiring first. During
replacement connect the wiring last.
Do not activate the throttle body using a DC suppy to test the motor,as permanent damage to
the throttle body will result.
10 (B-20) Throttle position
sensor power supplyIgnition switch: "ON" 4.9 5.1 V
57 (B-20) Throttle position
sensor (sub)(1) Accelerator pedal:
Released
(2) Accelerator pedal:
Depressed(1) Throttle
valve fully
closed1035
1250 mV
(2) Throttle
valve fully open4000 mV or more
42 (B-20) Throttle position
sensor (main)(1) Accelerator pedal:
Released
(2) Accelerator pedal:
Depressed(1) Throttle
valve fully
closed1035
1250 mV
(2) Throttle
valve fully open4000 mV or more
49 (B-20) Throttle actuator
control motor (
)
Ignition switch: "ON"
Accelerator pedal: fully closed to fully
openedDecreases slightly
(approx. 2 V) from
battery voltage.
50 (B-20) Throttle actuator
control motor (+)
Ignition switch: "ON"
Accelerator pedal: fully opened to fully
closedDecreases slightly
(approx. 2 V) from
battery voltage. TERMINAL
NO.CHECK ITEM CHECK CONDITION NORMAL
CONDITION

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-69
SPECIAL TOOLSM1172000600509
TOOL TOOL NUMBER AND
NAMESUPERSESSION APPLICATION
MB991958
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826
MUT-III sub assembly
A: Vehicle
communication
interface (V.C.I.)
B: MUT-III USB cable
C: MUT-III main harness
A (Vehicles with CAN
communication
system)
D: MUT-III main harness
B (Vehicles without
CAN communication
system)
E: MUT-III main harness
C (for Daimler Chrysler
models only)
F: MUT-III measurement
adapter
G: MUT-III trigger
harnessMB991824-KIT
NOTE: G: MB991826
MUT-III trigger harness is
not necessary when
pushing V.C.I. ENTER
key.Checking diagnostic
trouble codes
For vehicles with CAN
communication, use
MUT-III main harness A
to send simulated
vehicle speed. If you
connect MUT-III main
harness B or C instead,
the CAN
communication does
not function correctly.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-70
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Inspection harness
B: LED harness
C: LED harness adapter
D: ProbeGeneral service tools Checking the continuity
and measuring the
voltage at the harness
connector
MB992044
Engine ECU check
harness
Measuring the terminal
voltage at the Engine
ECU
MB992045
Auto Trans. ECU check
harness
Measuring the terminal
voltage at the Auto Trans.
ECU TOOL TOOL NUMBER AND
NAMESUPERSESSION APPLICATION

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-71
ON-VEHICLE SERVICE
AUTO-CRUISE CONTROL SWITCH CHECKM1172001200054
AUTO-CRUISE CONTROL MAIN SWITCH CHECK
1. Turn the ignition switch to the "ON" position.
2. Check that the "CRUISE" indicator lamp 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.
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 below the set speed because of climbing a hill for
example, it is normal for the auto-cruise control to be can-
celled.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-72
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.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-73
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
"ACC/RES" switch ON Approximately 887
"COAST/SET" switch ON Approximately 300
MEASUREMENT
CONDITIONTERMINAL
CONNECTOR
OF TESTERSPECIFIED
CONDITION
When brake pedal
is depressed.1
2 (for
stoplamp circuit)Less than 2 ohms
3
4 (for
auto-cruise
control circuit)Open circuit
When brake pedal
is not depressed.1
2 (for
stoplamp circuit)Open circuit
3
4 (for
auto-cruise
control circuit)Less than 2 ohms

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-74
THROTTLE POSITION SENSOR
Refer to GROUP 13A, On-vehicle Service Throttle Actuator
Control Motor Check 13A-671 (3.8L engine).
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.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-75
AUTO-CRUISE CONTROL
REMOVAL AND INSTALLATIONM1172001400467
Before removal of the air bag module, refer to GROUP 52B, SRS Service Precautions
P.52B-16 and GROUP 52B, Air Bag Module and Clock Spring P.52B-237.
CONTROL SWITCH REMOVAL
STEPS
1. AIR BAG MODULE SIDE> (REFER TO GROUP 52B, AIR
BAG MODULES AND CLOCK
SPRING P.52B-237)
2. STEERING WHEEL ASSEMBLY
(REFER TO GROUP 37, STEERING
WHEEL P.37-23)
3. LOWER COVER CAP
4. AUTO-CRUISE CONTROL SWITCH
CONTROL UNIT REMOVAL
5. Engine ECU [REFER TO GROUP
13A, Engine ECU 13A-675] SENSOR REMOVAL STEPS
6. TRANSMISSION INHIBITOR
SWITCH (REFER TO GROUP 23B,
AUTOMATIC TRANSMISSION)
7. THROTTLE BODY (BUILT-IN
THROTTLE POSITION SENSOR
AND THROTTLE ACTUATOR
CONTROL MOTOR) (REFER TO
GROUP 13A, THROTTLE BODY
13A-660)
8. ACCELERATOR PEDAL (BUILT-IN
ACCELERATOR PEDAL POSITION
SENSOR) (REFER TO GROUP 17,
ACCELERATOR PEDAL P.17-9)
9. STOPLIGHT SWITCH (REFER TO
GROUP 35A, BRAKE PEDAL
P.35A-24)