Mitsubishi Grandis. Manual — part 790

17-1

GROUP 17

ENGINE AND

EMISSION

CONTROL

CONTENTS

ENGINE CONTROL . . . . . . . . . . . . . .

17-3

GENERAL INFORMATION. . . . . . . . . . . . .

17-3

ACCELERATOR PEDAL . . . . . . . . . . . . . .

17-3

REMOVAL AND INSTALLATION . . . . . . . .

17-3

AUTO-CRUISE CONTROL . . . . . . . .

17-4

GENERAL INFORMATION. . . . . . . . . . . . .

17-4

SPECIAL TOOL . . . . . . . . . . . . . . . . . . . . .

17-5

TROUBLESHOOTING . . . . . . . . . . . . . . . .

17-5

DIAGNOSIS TROUBLESHOOTING FLOW

17-5

DIAGNOSIS FUNCTION. . . . . . . . . . . . . . .

17-5

CHECK CHART FOR DIAGNOSIS CODES

17-6

DIAGNOSTIC TROUBLE CODE PROCEDURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-7

Code No.15 Auto-cruise Control Switch System

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-7

Code No.21 Cancel Latch Signal System . .

17-20

Code No.22 Stop Lamp Switch System <L.H. drive
vehicles> . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-21

Code No.22 Stop Lamp Switch System <R.H. drive
vehicles> . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-30

Code No. 23 Engine-ECU <M/T> or engine-A/T-ECU

<A/T> and its related components . . . . . . .

17-38

CHECK CHART FOR TROUBLE SYMPTOMS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-39

SYMPTOM PROCEDURES . . . . . . . . . . . .

17-39

INSPECTION PROCEDURE 1: When the Brake Pedal
is Depressed, Auto-cruise Control is not Cancelled.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-39

INSPECTION PROCEDURE 2: When the Clutch Pedal
is Depressed, Auto-cruise Control is not Cancelled
<M/T>.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-40

INSPECTION PROCEDURE 3: When the Selector
Lever is Moved to "N" Range, Auto-cruise Control is not

Cancelled <A/T>.. . . . . . . . . . . . . . . . . . . . .

17-46

INSPECTION PROCEDURE 4: When the Auto-cruise
Control "CANCEL" Switch is Set to ON, Auto-cruise

Control is not Cancelled. . . . . . . . . . . . . . . .

17-47

INSPECTION PROCEDURE 5: Auto-cruise Control

cannot be Set. . . . . . . . . . . . . . . . . . . . . . . .

17-47

INSPECTION PROCEDURE 6: Hunting (Repeated
Acceleration and Deceleration) Occurs at the Set

Vehicle Speed <M/T>. . . . . . . . . . . . . . . . . .

17-48

INSPECTION PROCEDURE 7: Hunting (Repeated
Acceleration and Deceleration) Occurs at the Set

Vehicle Speed <A/T>. . . . . . . . . . . . . . . . . .

17-48

INSPECTION PROCEDURE 8: When the auto-cruise
control MAIN switch is turned ON, the auto-cruise
control indicator lamp does not illuminate. (However,

the auto-cruise control system is normal). . .

17-49

DATA LIST REFERENCE TABLE. . . . . . . .

17-50

CHECK AT ECU TERMINAL. . . . . . . . . . . .

17-52

ON-VEHICLE SERVICE . . . . . . . . . . . . . . .

17-53

AUTO-CRUISE CONTROL SWITCH CHECK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-53

AUTO-CRUISE CONTROL SYSTEM COMPONENT
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-55

AUTO-CRUISE CONTROL . . . . . . . . . . . . .

17-56

REMOVAL AND INSTALLATION . . . . . . . .

17-56

EMISSION CONTROL MPI. . . . . . . . .

17-57

GENERAL INFORMATION . . . . . . . . . . . . .

17-57

EMISSION CONTROL DEVICE REFERENCE TABLE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-57

SERVICE SPECIFICATION(S) . . . . . . . . . .

17-57

17-2

SPECIAL TOOL . . . . . . . . . . . . . . . . . . . . .

17-58

VACUUM HOSE . . . . . . . . . . . . . . . . . . . . .

17-58

VACUUM HOSE PIPING DIAGRAM . . . . .

17-58

VACUUM CIRCUIT DIAGRAM . . . . . . . . . .

17-59

VACUUM HOSE CHECK . . . . . . . . . . . . . .

17-59

VACUUM HOSE INSTALLATION. . . . . . . .

17-59

CRANKCASE EMISSION CONTROL SYSTEM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-59

GENERAL INFORMATION (CRANKCASE EMISSION

CONTROL SYSTEM) . . . . . . . . . . . . . . . . .

17-59

COMPONENT LOCATION (CRANKCASE EMISSION

CONTROL SYSTEM) . . . . . . . . . . . . . . . . .

17-60

POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-60

POSITIVE CRANKCASE VENTILATION (PCV) VALVE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-61

EVAPORATIVE EMISSION CONTROL SYSTEM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-61

GENERAL INFORMATION (EVAPORATIVE

EMISSION CONTROL SYSTEM) . . . . . . . .

17-61

COMPONENT LOCATION (EVAPORATIVE

EMISSION CONTROL SYSTEM) . . . . . . . .

17-62

PURGE CONTROL SYSTEM CHECK . . . .

17-62

PURGE PORT VACUUM CHECK. . . . . . . .

17-62

PURGE CONTROL SOLENOID VALVE CHECK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-62

CANISTER REMOVAL AND INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-64

EXHAUST GAS RECIRCULATION (EGR) SYSTEM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-64

GENERAL INFORMATION (EGR SYSTEM)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-64

COMPONENT LOCATION (EGR SYSTEM)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-65

EGR VALVE (STEPPER MOTOR) CHECK

17-65

EXHAUST GAS RECIRCULATION (EGR) VALVE

REMOVAL AND INSTALLATION . . . . . . . .

17-67

CATALYTIC CONVERTER . . . . . . . . . . . . .

17-68

REMOVAL AND INSTALLATION . . . . . . . .

17-68

ENGINE CONTROL

ENGINE AND EMISSION CONTROL

17-3

ENGINE CONTROL

GENERAL INFORMATION

M1171000100352

For the accelerator system, an electronic throttle
actuator control system is utilized, eliminating the
accelerator cable.

ACCELERATOR PEDAL

REMOVAL AND INSTALLATION

M1171003000031

CAUTION

• Never loosen the screw fixing the accelerator pedal assembly resin cover. If the screw is

loosened, the sensor incorporated in the resin cover is misaligned and the accelerator pedal
position sensor (APS) do not work normally.

• Do not remove the accelerator pedal pad. If the pad is removed and installed, excessive force may

damage APS.

AC310547

AC302205

AC31441

AB

1

13 ± 2 N·m

12 ± 2 N·m

13 ± 2 N·m

2

3

3

4

1

13 ± 2 N·m

2

<L.H. drive vehicles>

<R.H. drive vehicles>

Removal steps

1.

Accelerator pedal position sensor
(APS) connector

2.

Accelerator pedal assembly

3.

Accelerator pedal arm stopper

•

Turn up the floor mat <Driver’s
side>

4.

Accelerator pedal bracket <L.H.
drive vehicles>

Removal steps (Continued)

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-4

AUTO-CRUISE CONTROL

GENERAL INFORMATION

M1172000100355

By using the auto-cruise control, the driver can drive
at preferred speeds in a range of approximately 40 to
200 km/h without depressing the accelerator pedal.

For this auto-cruise control system, in conjunction
with the electronic throttle valve control system, the
engine-ECU <M/T> or engine-A/T-ECU <A/T>
electronically controls the throttle valve.

CONSTRUCTION DIAGRAM

AC310711

AC310578

AC310579

AC302161

AC310676

AC310710

AC310397

AC311198

Engine-ECU <M/T> or
engine-A/T-ECU <A/T>

Engine-ECU <M/T> or
engine-A/T-ECU <A/T>

<L.H. drive vehicles>

<R.H. drive vehicles>

Auto-cruise control switch

Auto-cruise control
indicator lamp

Diagnosis connector

Stop lamp switch

Clutch switch

Vehicle speed
sensor

Inhibitor switch

Throttle body assembly
(Built-in throttle position
sensor and throttle valve
control servo)

Accelerator pedal
(Built-in accelerator
pedal position sensor)

AB