fuel MITSUBISHI TRITON 1997 Service Manual

13F-1
FUEL SUPPLY
CONTENTS13509000111
GENERAL INFORMATION 2. . . . . . . . . . . . . . . .
FUEL TANK 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . FUEL FILTER <Diesel-powered Vehicles>
6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FUEL SUPPLY ± General Information13F-2
GENERAL INFORMATION13500010083
The fuel tank is equipped with a valve assembly
(roll-over valve). It prevents fuel from leaking out
of the fuel tank if the vehicle rolls over.

(
D ouble c ab ) (
S in gle c ab a n d
c lu b c ab ) (
4 W D) 1
2
3
4
5
6
7
8
9 1
0
1
1
12
1 3 1
4
15
1 6 1
7
1 8
1
9 2
4 ± 2 9 N m 2
± 3 N m
9 1
4 1
5
14
1 5
1 6
1
7
R em oval s te p s
1 . Fuel fille r c a p
2 . Fille r n eck
3 . P ackin g
4 . Leve lin g h ose

B 5. Fille r h ose
6 . Fuel g auge u nit c o nnecto r
7 . R etu rn h ose
8 . M ain h ose
9 . Fuel ta nk n uts
1 0. Fuel g auge u nit 1
1 . P ip e a sse m bly
1 2. Fuel filt e r
1 3. P ackin g
1 4. Valv e a sse m bly
1 5. Vapor h ose
1 6. B re ath er c a se

A 17. 2-w ay v a lv e
1 8. D ra in p lu g
1 9. Fuel ta nk
I N STA LLA TIO N S ER VIC E P O IN TS

A 2-W AY V A LV E IN STA LLA TIO N
I n sta ll th e 2 -w ay v a lv e , b ein g c a re fu l n ot to m is ta ke th e
d ir e ctio n. F
uel h ose

F
U EL F IL T E R < D IE SEL-P O W ER ED V EH IC LE S> 13500270016
R EM OVA L A ND IN STA LLA TIO N <
V eh ic le s w it h out f u el lin e h eate r> <
V eh ic le s w it h f u el lin e h eate r> 4
.9 ± 6 .8 N m 2
.0 ± 2 .5 N m
2
34
6 5
8
9
7 1
2 ± 1 5 N m 1
2 ± 1 5 N m 1
2 ± 1 5 N m 1
2 ± 1 5 N m 1
4 N m
R em oval s te p s
 In te rc o ole r a sse m bly < 4W D> ( R efe r
t o G RO UP 1 5.)

A 1. M ain h ose c o nnectio n
2 . Fuel filt e r
3 . D ra in p lu g
4 . W ate r le ve l s e nso r 5
. Fuel filt e r c a rtr id ge
6 . Fuel filt e r p um p
7 . B re ath er s cre w
8 . S ole noid v a lv e a sse m bly ( fo r A /C )
9 . Fuel filt e r b ra cke t
I N STA LLA TIO N S ER VIC E P O IN T

A FU EL M AIN H O SE IN STA LLA TIO N
I f th e p ip e h as a s te pped p art, c o nnect s e cu re ly u p to th e
s te pped p art. If th e p ip e h as n o s te pped p art, in se rt s o th at
t h e in se rte d p ortio n is 2 0 ± 2 5 m m lo ng.
I N SPEC TIO N 13500290012
W ATE R L E VEL S EN SO R C HEC K
C onnect th e c ir c u it te ste r to th e w ate r le ve l s e nso r c o nnecto r.
T he w ate r le ve l s e nso r is o pera tin g c o rre ctly if th ere is
c o ntin uit y w hen th e flo at is r a is e d, a nd n o c o ntin uit y w hen
i t is lo w ere d. F
lo at

± Emission Control System <MPI> ENGINE AND
EMISSION CONTROL17-6
EMISSION CONTROL SYSTEM <MPI>17300010184
GENERAL INFORMATION
The emission control system consists of the following subsystems:

Crankcase emission control system

Evaporative emission control system

Exhaust emission control system
ItemsNameSpecification
Crankcase emission
control systemPositive crankcase ventilation (PCV) valveVariable flow type
(Purpose: HC reduction)
Evaporative emission
control systemCanister
Purge control solenoid valveEquipped
ON/OFF type solenoid valve
(Purpose: HC reduction)
Exhaust emission
control systemAir-fuel ratio control device±MPI systemOxygen sensor feedback type
(Purpose: CO, HC, NOx reduction)
Exhaust gas recirculation system

EGR valve

EGR control solenoid valveEquipped
Single type
Duty cycle type solenoid valve
(Purpose: NOx reduction)
Catalytic converterMonolith type
(Purpose: CO, HC, NOx reduction)
EMISSION CONTROL DEVICE REFERENCE TABLE
Related partsCrankcase
emission
control
systemEvaporative
emission
control
systemAir/fuel
ratio
control
systemCatalytic
converterExhaust
gas
recircula-
tion systemReference
page
PCV valvey17-
Purge control solenoid valvey17-
MPI system componentyyGROUP 13A
Catalytic convertery17-
EGR valvey17-
EGR control solenoid valvey17-

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-10
Immobilizer System
Caution
1. The ID code should always be re-registered when replacing the immobilizer-ECU. <Petrol-powered
vehicles>
2. If the immobilizer-ECU has been replaced, you will need to re-register the ignition key ID codes
and to reset the code for the fuel cut valve controller to the factory setting. <Diesel-powered
vehicles>
3. If the immobilizer-ECU has been replaced with a new part, the password (vehicle secret code)
which has been stored in the immobilizer-ECU for each vehicle will be replaced by the password
(secret code) specified by the customer.
STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING54300690024
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION54300700116
DIAGNOSIS CODES CHECK
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
ERASING DIAGNOSIS CODES
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
Caution
The diagnosis codes which result from disconnecting the battery cables cannot be erased.
INSPECTION CHART FOR DIAGNOSIS CODES
<PETROL-POWERED VEHICLES>
54300710027
Diagnosis code No.Inspection itemsReference
page
11Transponder communication system or radio interference of ID code54-11
12*ID code are not the same or are not registered54-11
21Communication system between MUT-II and engine-ECU54-12
31EEPROM abnormality inside immobilizer-ECU54-12
NOTE
*: Diagnosis code No. 12 is not recorded.

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-13
INSPECTION CHART FOR DIAGNOSIS CODES
<DIESEL-POWERED VEHICLES>
54300710034
Diagnosis code No.Inspection itemsReference page
11Transponder communication system or radio interference of ID
code54-11
12*ID codes are not the same or not registered54-11
21Communication system between fuel cut valve controller and
immobilizer-ECU54-13
22Malfunction of fuel cut valve controller system54-14
23Identification codes are not identical54-14
31EEPROM abnormality inside immobilizer-ECU54-12
NOTE
*: diagnosis code No.12 is recorded.
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
<DIESEL-POWERED VEHICLES>
For diagnosis code numbers other than those listed below, refer to ªPETROL-POWERED VEHICLESº.
Code No.21 Communication system between fuel cut
valve controller and immobilizer-ECU
Probable cause
The confirmation code is not sent from the fuel cut valve controller within the specified
time after the ignition key is turned to ON or, an incorrect code is sent.
Malfunction of harness or connector

Malfunction of fuel cut valve controller

Malfunction of immobilizer-ECU
Check the following connectors: A-90, C-19, C-36NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the immobilizer-ECU and fuel cut valve
controller.NG
Repair
OK
Check the fuel cut valve controller power source and earth circuit.
(Refer to P.54-17, Inspection Procedure 6.)NG
Repair
OK
Check trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code), reset the code to the factory
setting and register the ID code. (Refer to P.54-23.)
Check trouble symptom.
NG
Replace the fuel cut valve controller (fuel injection pump assembly).

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-14
Code No.22 Malfunction of fuel cut valve controller
systemProbable cause
The cause is probably a malfunction of the fuel cut valve controller.
Malfunction of fuel cut valve controller
Check the fuel cut valve controller power source and earth circuit.
(Refer to P.54-17, Inspection Procedure 6.)
OK
Check trouble symptom.NGReplace the fuel cut valve controller (fuel injection pump assembly).
Code No.23 Identification codes are not identicalProbable cause
The identification code received from the immobilizer-ECU is not identical to the
identification code that has been recorded in the fuel cut valve controller.
Resetting the code to the factory setting is not made
using the MUT-II

Malfunction of fuel cut valve controller
Use the MUT-II to reset the code to the factory setting.
(Refer to P.54-23.)
Check trouble symptom.NGReplace the fuel cut valve controller (fuel injection pump assembly).
Check trouble symptom.
NG
Replace the immobilizer-ECU.
Register the password (secret code), reset the code to the factory
setting and register the ID code. (Refer to P.54-23.)
INSPECTION CHART FOR TROUBLE SYMPTOMS54300720242
Trouble symptomInspection procedure No.Reference page
Communication with MUT-II is impossible154-15
ID code cannot be registered using the MUT-II254-15
Engine does not start (Cranking but no initial combustion).
<Petrol-powered vehicles>354-16
Engine does not start (Cranking but no initial combustion).
<Diesel-powered vehicles>454-16
Malfunction of the immobilizer-ECU power source and
earth circuit554-17
Malfunction of the fuel cut valve controller power source
and earth circuit <Diesel-powered vehicles>654-17

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-16
Inspection Procedure 3
Engine does not start (Cranking but no initial combus-
tion). <Petrol-powered vehicles>
Probable cause
If the fuel injectors are not operating, there might be a problem with the MPI system
in addition to a malfunction of the immobilizer system.
It is normal for this to occur if an attempt is made to start the engine using a key
that has not been properly registered.
Malfunction of MPI system

Malfunction of immobilizer-ECU
Check the system voltage during crank-
ing
OK:8 V or moreNGCheck the battery.
OK
Is a diagnosis code displayed from the
immobilizer-ECU?Ye sTo INSPECTION CHART FOR DIAG-
NOSIS CODE. (Refer to P.54-10.)
No
Is a diagnosis code displayed from the
engine-ECU?Ye sRefer to GROUP 13A ± Troubleshoot-
ing.
No
Check the starting system. (Refer to
GROUP 13A ± Troubleshooting.)
OK
Check trouble symptom.
NG
Check the immobilizer-ECU power
source and the earth circuit. (Refer to
P.54-17, Inspection Procedure 5.)OKCheck trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code)
and the ID code. (Refer to P.54-23.)
Inspection Procedure 4
Engine does not start (Cranking but no initial combus-
tion). <Diesel-powered vehicles>
Probable cause
If no fuel injection, there might be a problem with the fuel injection system in addition
to a malfunction of the immobilizer system.
It is normal for this to occur if an attempt is made to start the engine using a key
that has not been properly registered.
Malfunction of diesel fuel injection system

Malfunction of immobilizer-ECU
Check the system voltage during crank-
ing
OK:8 V or moreNGCheck the battery.
OK
Is a diagnosis code displayed from the
immobilizer-ECU?Ye sTo INSPECTION CHART FOR DIAG-
NOSIS CODE. (Refer to P.54-13.)
No
Check the diesel fuel injection system.
(Refer to GROUP 13E ± On-vehicle Ser-
vice.)
OK
Check the immobilizer-ECU power sup-
ply and the earth circuit. (Refer to
P.54-17, Inspection Procedure 5.)OKCheck trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code),
reset the code to the factory setting and
register the ID code. (Refer to P.54-23.)
Check trouble symptom.
NG
Replace the fuel cut valve controller
(fuel injection pump assembly).

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-17
Inspection Procedure 5
Malfunction of the immobilizer-ECU power source and earth circuit
Measure at the immobilizer-ECU con-
nector C-36.

Disconnect the connector and
measure at the harness side.

Ignition switch: ON
1. Voltage between 1 and body earth,
2 and body earth <petrol-powered
vehicles> and between 9 and body
earth.
OK:System voltage
2. Continuity between 8 and body earth
and between 16 and body earth.
OK:Continuity(1) NGCheck the following connectors:
<Petrol-powered vehicles>
C-19, C-36, C-87, C-83
<Diesel-powered vehicles>
C-36, C-87, C-83NG
Repair
OK
Check trouble symptom.NG<Petrol-powered vehicles>
Check the harness between the immobi-
lizer-ECU and engine control relay, and
repair if necessary.
<Diesel-powered vehicles>
Check the harness between the immobi-
lizer-ECU and junction block, and repair
if necessary.
(2) NG
Check the following connector:
C-36NG
Repair
OK
Check trouble symptom.NGCheck the harness between the immobi-
lizer-ECU and body earth and repair if
necessary.
Inspection Procedure 6
Malfunction of the fuel cut valve controller power source and earth circuit
<Diesel-powered vehicles>
OK
Check trouble symptom.NGCheck the harness between the fuel cut
valve controller and junction block, and
repair if necessary.
(2) NGCheck the following connector:
A-90NG
Repair
OK
Check trouble symptom.NGCheck the harness between the fuel cut
valve controller and earth, and repair
if necessary.
Measure at the fuel cut valve controller
connector A-90.

Disconnect the connector and
measure at the harness side.

Ignition switch: ON
1. Voltage between 2 and body earth.
OK:System voltage
2. Continuity between 3 and body
earth.
OK:Continuity(1) NGCheck the following connectors:
A-90, C-19, C-87NG
Repair