SCOPE OF MAINTENANCE, REPAIR AND
SERVICING EXPLANATIONS
This manual provides explanations, etc. concerning
procedures for the inspection, maintenance, repair
and servicing of the subject model. Note, however,
that for engine and transmission-related component
parts, this manual covers only on-vehicle inspec
tions, adjustments, and the removal and installation
procedures for major components. For detailed infor
mation concerning the inspection, checking, adjustment, disassembly and reassembly of the engine,
transmission and major components after they have
been removed from the vehicle, please refer to sepa
rate manuals covering the engine and the transmission.
ON-VEHICLE SERVICE
"On-vehicle Service" is procedures for performing
inspections and adjustments of particularly important
locations with regard to the construction and for
maintenance and servicing, but other inspection (for
looseness, play, cracking, damage, etc.) must also
be performed.
INSPECTION
Under this title are presented inspection and checking procedures to be performed by using special
tools and measuring instruments and by feeling, but,
for actual maintenance and servicing procedures,
visual inspections should always be performed as
well.
DEFINITION OF TERMS
STANDARD VALUE
Indicates the value used as the standard for judging
the quality of a part or assembly on inspection or the
value to which the part or assembly is corrected and
adjusted. It is given by tolerance.
LIMIT
Shows the standard for judging the quality of a part
or assembly on inspection and means the maximum
or minimum value within which the part or assembly
must be kept functionally or in strength. It is a value
established outside the range of standard value.
-
GENERAL
M1001000101016
REFERENCE VALUE
Indicates the adjustment value prior to starting the
work (presented in order to facilitate assembly and
adjustment procedures, and so they can be com
pleted in a shorter time).
DANGER, WARNING, AND CAUTION
DANGER, WARNING, and CAUTION call special
attention to a necessary action or to an action that
must be avoided. The differences among DANGER,
WARNING, and CAUTION are as follows:
• If a DANGER is not followed, the result is severe
-
bodily harm or even death.
• If a WARNING is not followed, the result could be
bodily injury.
• If a CAUTION is not followed, the result could be
damage to the vehicle, vehicle components or
service equipment.
INDICATION OF TIGHTENING TORQUE
Tightening torques (units: N⋅ m) are set to take into
account the central value and the allowable toler
ance. The central value is the target value, and the
allowable tolerance provides the checking range for
tightening torques. If bolts and nuts are not provided
with tightening torques, refer to
P.00-37.
MODEL INDICATIONS
The following abbreviations are used in this manual
for identification of model types.
2500:Indicates an engine with the 2,477mL <4D56>
diesel engine.
3200:Indicates an engine with the 3,200mL <4M41>
diesel engine.
DOHC: Indicates an engine with the double over-
head camshaft.
M/T:Indicates the manual transmission.
A/T:Indicates the automatic transmission.
A/C:Indicates the air conditioner.
-
-
GENERAL
HOW TO USE THIS MANUAL
EXPLANATION OF MANUAL CONTENTS
Indicates the
Denotes tightening torque.
For bolts and nuts which do
not have a tightening torque
listed, refer to the "Standard
Parts tightening-torque Table"
section title.
Indicates the
group title.
00-3
Indicates the
group number.
Indicates the page number.
Indicates procedures to be performed before the work in that section is started, and
procedures to be performed after the work
in that section is finished.
Component diagram
A diagram of the component parts is provided near the front of each section in order
to give the reader a better understanding of
the installed condition of component parts.
Maintenance and servicing procedures
The numbers provided within the diagram indicate the
sequence for maintenance and servicing procedures.
Removal steps :
The part designation number corresponds to
the number in the illustration to indicate remov al steps.
Disassembly steps :
The part designation number corresponds to
the number in the illustration to indicate disas sembly steps.
Mark denotes nonreusable part.
N
Repair kit or parts sets are shown.
(Only very frequently used parts are shown.)
Installation steps :
Specified in case installation is impossible in
reverse order of removal steps. Omitted if
installation is possible in reverse order of re moval steps.
Reassembly steps :
Specified in case installation is impossible in
reverse order of removal steps. Omitted if
reassembly is possible in reverse order of dis assembly steps.
AC311238
AB
00-4
GENERAL
HOW TO USE THIS MANUAL
Classifications of major maintenance / service points
When there are major points relative to maintenance and servicing procedures (such as essential maintenance
and service points, maintenance and service standard values, information regarding the use of special tools, etc.).
These are arranged together as major maintenance and service points and explained in detail.
<<A>> : Indicates that there are essential points for removal or disassembly.
>>A<< : Indicates that there are essential points for installation or reassembly.
35A-21
Operating procedures,
cautions, etc. on removal,
installation, disassembly and
reassembly are described
The title of the page
(following the page on which
the diagram of component
parts is presented) indicating
the locations of lubrication and
sealing procedures.
Indicates (by symbols) where
lubrication is necessary.
Symbols for lubrication, sealants and adhesives
Symbols are used to show the locations for lubrication
and for application of sealants and adhesives.
These symbols are included in the diagram of component parts or on the page following the component
parts page. The symbols do not always have accompanying text to support that symbol.
Grease
(Multi-purpose grease unless there is a
brand or type specified)
Sealant or adhesive
Brake fluid or automatic transmission fluid
Engine oil, gear oil or air conditioning compressor oil
Adhesive tape or butyl rubber tape
AC311239
AB
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
00-5
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE
POINTS
CONTENTS OF TROUBLESHOOTING
M1001013300211
CAUTION
During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s) discon
nected. On completion, confirm all systems for
diagnosis code(s). If diagnosis code(s) are set,
erase them all.
WARNING
Since the radiator fan rotates during CAN
bus line diagnostics, make sure that no one
is servicing the engine compartment before
diagnosing the CAN bus line. Since the CAN
communication stops when diagnosing the
CAN bus line, the ETACS-ECU detects the
time-out of the engine-ECU, and activates
the radiator fan to prevent overheating as
fail-safe.
Troubleshooting of electronic control systems for
which the M.U.T.-III can be used follows the basic
outline described below. Even in systems for which
the M.U.T.-III cannot be used, some of these sys
tems still follow this outline.
-
-
1. STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING
Troubleshooting sections are based on the diagnostic flow as below. If the diagnostic flow is different from
that given below, or if additional explanation is required, the details of such differences or additions will also
be listed.
00-6
Diagnosis method
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
Gathering information
from the customer.
Reoccurs
CAN bus diagnosis*
OK
Read the diagnosis code.Read the diagnosis code.
No diagnosis code
or communication
with M.U.T.-III not
possible
Refer to the INSPECTION CHART
FOR TROUBLE SYMPTOMS
(Refer to applicable group).
1
Diagnosis code
displayed.
(Past trouble)*
How to treat past
trouble*
3
4
Diagnosis code
displayed.
(Current trouble)*
Check trouble symptom.
NG
CAN bus diagnosis chart*
3
After taking note of the
malfunction code, erase the
diagnosis code memory.
Recheck trouble symptom.
Read the diagnosis codes.
Diagnosis code
displayed.
Refer to the INSPECTION CHART
FOR DIAGNOSIS CODES
(Refer to applicable group).
2
Diagnosis code
displayed.
(Current trouble)*
Does not reoccur
3
Diagnosis code
displayed.
(Past trouble)*
How to treat past
trouble*
4
No diagnosis
code.
INTERMITTENT MALFUNCTIONS*
3
No diagnosis
code.
5
AC501888
• *1: For how to diagnose CAN bus lines, refer to GROUP 54C .
• *2: For the CAN bus diagnosis chart, refer to GROUP 54C .
• *3: When the M.U.T.-III detects a diagnosis code, its display informs users whether a mechanical problem
currently exists or whether it existed before. The message for the former state identifies it as a "Active"
and the message for the latter identifies it as a "Stored".
• *4: For how to treat past trouble, refer to P.00-13.
• *5: For how to cope with intermittent malfunctions, refer to P.00-12.
2. SYSTEM OPERATION AND SYMPTOM
VERIFICATION TESTS
If verification of the symptom(s) is difficult, procedures for checking operation and verifying symptoms
5. DIAGNOSIS CODE PROCEDURES
Indicates the inspection procedures corresponding to
each diagnosis code (Refer to How to Use Inspection
Procedures
P.00-8).
are shown.
6. TROUBLE SYMPTOM CHART
3. DIAGNOSIS FUNCTION
Details which are different from those in the "Diagnosis Function P.00-7" section are described.
If there are trouble symptoms even though the
M.U.T.-III does not find any diagnosis codes, Inspec
tion procedures for each trouble symptom will be
found by means of this chart.
4. DIAGNOSIS CODE CHART
Diagnostic trouble codes and diagnostic items are
shown.
-
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
00-7
7. SYMPTOM PROCEDURES
Indicates the inspection procedures corresponding to
each symptoms classified in the Symptom Chart
(Refer to How to Use Inspection Procedures
P.00-8).
8. SERVICE DATA REFERENCE TABLE
Inspection items and normal judgment values have
been provided in this chart as reference information.
9. ACTUATOR TEST TABLE
The Actuator Test item numbers, inspection items,
and judgment values have been provided in this
chart as reference information.
10. CHECK AT ECU TERMINALS
Terminal numbers for the ECU connectors, inspection items, and judgment values have been provided
in this chart as reference information.
11. INSPECTION PROCEDURE BY USING
AN OSCILLOSCOPE
When there are inspection procedures using an
oscilloscope, these are described here.
DIAGNOSIS FUNCTION
M1001013400100
HOW TO READ DIAGNOSIS CODE
Connect the M.U.T.-III to the 16-pin diagnosis connector, and read the diagnosis code.
NOTE: For details on how to use the M.U.T.-III, refer
to the "M.U.T.-III operation manual."
1. Ensure that the ignition switch is at the "LOCK"
(OFF).
2. Start up the personal computer.
3. Connect M.U.T.-III USB cable MB991827 to
special tool Vehicle Communication Interface
(V.C.I.) MB991824 and the personal computer.
4. Connect M.U.T.-III main harness A MB991910 to
the V.C.I.
5. Connect the M.U.T.-III main harness A to the
diagnosis connector.
6. Turn the V.C.I. power switch to the "ON" position.
NOTE: When the V.C.I. is energized, the V.C.I.
indicator lamp will be illuminated in a green col
-
our.
7. Start the M.U.T.-III system on the personal
computer and turn the ignition switch to the "ON"
position.
8. Read the diagnosis code.
9. Disconnecting the M.U.T.-III is the reverse of the
connecting sequence, making sure that the
ignition switch is at the "LOCK" (OFF).
CAUTION
Before connecting or disconnecting the
M.U.T.-III, turn the ignition switch to the "LOCK"
(OFF) position.
Diagnosis
connector
MB991910
MB991824
ERASING DIAGNOSIS CODE
CAUTION
Before connecting or disconnecting the
M.U.T.-III, turn the ignition switch to the "LOCK"
(OFF) position.
Diagnosis
connector
MB991910
MB991824
MB991827
AC501413
AB
MB991827
AC501413
AB
00-8
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
GENERAL
Connect the M.U.T.-III to the diagnosis connector,
and erase the diagnosis code. The procedure is the
same as "How to Read Diagnosis Code
."
HOW TO USE THE INSPECTION PROCEDURES
M1001013500237
The causes of many of the problems occurring in electric circuitry are generally the connectors, components,
the ECU, the wiring harnesses between connectors, in that order. These inspection procedures follow this
order. They first try to discover a problem with a connector or a defective component.
Relevant circuit(s) of the component which
the Code No. indicates are described.
AC301964
AB
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
00-9
Explains about the basic
operation of the components.
Explains about
technical details.
Describes the
conditions for that
diagnosis code being
set.
Start of diagnosis
procedure
Describes
inspection
procedure.
M.U.T.-III data list
Describes possible
causes(s) for that
diagnosis code.
CURRENT TROUBLE
Indicates that the status is "Active" and the trouble is
currently present. Carry out troubleshooting as
described in the applicable inspection procedure.
PAST TROUBLE
Indicates that the status is "Stored" and the trouble is
historic. Since the trouble may still be present, set
the vehicle to the diagnosis code detection condition
and check that the status changes to "Active". If the
status does not change from "Stored", observe the
applicable inspection procedure with particular
emphasis on connector(s) and wiring harness.
AC313955
AC
HARNESS CHECK
Check for an open or short circuit in the harness
between the terminals which are faulty according to
the connector measurements. Carry out this inspec
tion while referring to the Electrical Wiring Manual.
Here, "Check the wiring harness between the power
supply and terminal xx" also includes checking for
blown fuse. For inspection service points when there
is a blown fuse, refer to "Inspection Service Points
for a Blown Fuse
P.00-12."
MEASURES TO TAKE AFTER REPLACING THE ECU
If the trouble symptoms have not disappeared even
after replacing the ECU, repeat the inspection proce
dure from the beginning.
-
00-10
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
CONNECTOR MEASUREMENT SERVICE
POINTS
M1001013600223
CAUTION
During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s) discon
nected. On completion, confirm all systems for
diagnosis code(s). If diagnosis code(s) are set,
erase them all.
Turn the ignition switch to the "LOCK" (OFF) position
when connecting and disconnecting the connectors.
Turn the ignition switch to "ON" when measuring,
unless there are instructions to the contrary.
IF INSPECTING WITH THE CONNECTOR
CONNECTED <WATERPROOF
CONNECTORS>
CAUTION
Never insert a test probe from the harness side,
as this will reduce the waterproof performance
and result in corrosion.
Inspect by inserting a test probe from the harness
side. If the connector is too small to insert a test
probe (e.g. control unit connector), do not insert it
forcibly. Use special tool extra fine probe
(MB992006).
IF INSPECTING WITH THE CONNECTOR
DISCONNECTED <WHEN INSPECTING A
FEMALE PIN>
CAUTION
• Use special tool check harness (MB991219). If
the test bar is inserted forcibly, it will cause a
poor contact.
•
If the connector is disconnected, a diagnosis
code may be stored for the system to be
checked or other systems.
MB991219
Special tool
AC105597
AB
Use the special tools such as test harness, harness
connector or check harness.
IF INSPECTING WITH THE CONNECTOR
CONNECTED <ORDINARY
(NON-WATERPROOF) CONNECTORS>
MB992006
AC105598
AH
AC105599
AB
Use check harness (MB991219) of special tool harness set (MB991223).
IF INSPECTING WITH THE CONNECTOR
DISCONNECTED <WHEN INSPECTING A
MALE PIN>
CAUTION
• Be careful not to short the connector pins
with the test bars. To do so may damage the
circuits inside the ECU.
•
If the connector is disconnected, a diagnosis
code may be stored for the system to be
checked or other systems.
AC105600
Touch the pin directly with the test bar.
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
00-11
CONNECTOR INSPECTION SERVICE
POINTS
M1001013700189
VISUAL INSPECTION
•
Connector disconnected or
improperly connected
Stretched or broken wires
• Low contact pressure between male and female
terminals
• Low connection pressure due to rusted terminals
or foreign matter lodged in terminals
CONNECTOR PIN INSPECTION
AC300898
If the connector pin stopper is damaged, the terminal
connections (male and female pins) will not be per
fect even if the connector body is connected, and the
pins may pull out of the reverse side of the connec
tor. Therefore, gently pull the harnesses one by one
to make sure that no pins pull out of the connector.
-
-
Harness wire breakage
at terminal section
Low contact
pressure
Good
Bad
AC300896
AB
Connector is disconnected or improperly connected
• Connector pins are pulled out
• Due to harness tension at terminal section
CONNECTOR ENGAGEMENT
INSPECTION
MB991219
AC300899
Use special tool inspection harness (MB991219)
(connector pin connection pressure inspection har
ness of the inspection harness set) to inspect the
engagement of the male pins and female pins. (Pin
drawing force: 1 N or more)
AB
-
00-12
GENERAL
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
INSPECTION SERVICE POINTS FOR A
BLOWN FUSE
M1001013800186
CAUTION
A diagnosis code may be stored due to a blown
fuse.
Battery
Fuse
Short-circuit
Load
switch
occurrence
section
HOW TO COPE WITH INTERMITTENT
MALFUNCTIONS
M1001013900183
Load
AC300900
AB
Remove the blown fuse and measure the resistance
between the load side of the blown fuse and the
earth. Close the switches of all circuits which are
connected to this fuse. If the resistance is almost 0
Ω
at this time, there is a short somewhere between
these switches and the load. If the resistance is not 0
Ω, there is no short at the present time, but a momentary short has probably caused the fuse to blow.
The main causes of a short circuit are the following.
• Harness being clamped by the vehicle body
• Damage to the outer casing of the harness due to
wear or heat
• Water getting into the connector or circuitry
• Human error (mistakenly shorting a circuit, etc.)
AC300901
Intermittent malfunctions often occur under certain
conditions, and if these conditions can be ascer
tained, determining the cause becomes simple. In
order to ascertain the conditions under which an
intermittent malfunction occurs, first ask the cus
tomer for details about the driving conditions,
weather conditions, frequency of occurrence and
trouble symptoms, and then try to recreate the trou
ble symptoms. Next, ascertain whether the reason
why the trouble symptom occurred under these con
ditions is due to vibration, temperature or some other
factor. If vibration is thought to be the cause, carry
out the following checks with the connectors and
components to confirm whether the trouble symptom
occurs. The objects to be checked are connectors
and components which are indicated by inspection
procedures or given as probable causes (which gen
erates diagnosis codes or trouble symptoms).
-
-
GENERAL
VEHICLE IDENTIFICATION
00-13
• Gently shake the connector up, down and to the
left and right.
• Gently shake the wiring harness up, down and to
the left and right.
• Gently rock each sensor and relay, etc. by hand.
• Gently shake the wiring harness at suspensions
and other moving parts.
NOTE: If determining the cause is difficult, the drive
recorder function of the M.U.T.-III can also be used.
(For details on how to use the M.U.T.-III, refer to the
"M.U.T.-III operation manual).
VEHICLE IDENTIFICATION
VEHICLE NAME PLATE
HOW TO TREAT PAST TROUBLE
M1001014100157
Since the trouble may still be present even the status
is "Stored", set the vehicle to the diagnosis code
detection condition and check that the status
changes to "Active". If the status does not change
from "Stored", carry out the following procedure.
1. Establish from the customer whether a fuse or
connector has been replaced or disconnected.
2. If yes, erase the diagnosis code, and then check
that no diagnostic code is reset. If no diagnosis
code is reset, the diagnosis is complete.
3. If no, follow the applicable Diagnostic Trouble
Code Chart. Then check the wiring harness and
connector, and refer to "How to Cope with
Intermittent Malfunction
P.00-12 ."
M1001000401255
AC501406
AB
The name plate is riveted to the cowl top outer panel
in the engine compartment.
12
AC501266
AB
No.ItemContent
1MODELKA4 Vehicle model
KB4
KB8
2ENGINE4D56Engine model
4M41
00-14
VEHICLE IDENTIFICATION
GENERAL
MODELS
<CLUB CAB>
Model codeEngine modelTransmission modelFuel supply system
KA4TNCNMFRU4D56 IDI (Indirect
Diesel Injection) SOHC
engine with Turbo
charger (2,477 mL)
NCNUZRU4D56 DI-D (Direct
Injection-Diesel) DOHC
engine with Turbo
NCRUZRUR4AW4
charger (2,477 mL)
2WD
(rear axle
drive)
R5M21
(5-speed manual
transmission)
R5MB1
(5-speed manual
transmission)
(4-speed automatic
transmission)
Electrical fuel injection
(distribution type
injection pump system)
Electrical fuel injection
(common rail engine
control system)
KB4TGCNHZRU4D56 DI-D (Direct
Injection-Diesel) DOHC
engine with Inter cooler,
Turbo charger (2,477
mL)
KB8TGCNHZRU4M41 DI-D (Direct
Injection-Diesel) engine
with Inter cooler, Turbo
charger (3,200 mL)
<DOUBLE CAB>
Model codeEngine modelTransmission modelFuel supply system
KA4TNJNMZRU4D56 DI-D (Direct
Injection-Diesel) DOHC
engine with Turbo
NJNUZRU
NJRUZRUR4AW4
charger (2,477 mL)
4WD
(easy select
4WD)
2WD
(rear axle
drive)
V5MB1
(5-speed manual
transmission)
R5MB1
(5-speed manual
transmission)
(4-speed automatic
transmission)
Electrical fuel injection
(common rail engine
control system)
KB4TGJNHZRU4D56 DI-D (Direct
Injection-Diesel) DOHC
engine with Inter cooler,
Turbo charger (2,477
mL)
4D56 DI-D
(Direct
Injection-Diesel)
engine with
Turbo charger
Electrical fuel
injection
(common rail
engine control
system)
4D56 DI-D (Direct
Injection-Diesel)
engine with Turbo
charger
automatic
Electrical fuel
injection
(common rail
engine control
system)
00-22
<4WD>
GENERAL
GENERAL DATA AND SPECIFICATIONS
11
10
1
2
3
4
6
5
ItemsKB4TKB8T
GJNHZRUGJNHZRUGJNXZRUGJRXZRU
Vehicle
dimensions
Front track11,5201,5201,5201,520
Overall width21,8001,8001,8001,800
mm
Front overhang3785785785785
Wheel base43,0003,0003,0003,000
Rear overhang51,2101,2101,2101,210
Overall length64,9954,9954,9954,995
Ground clearance (unladen)7205205205205
Overall height (unladen)81,7801,7801,7801,780
12
13
8
7
9
AC502186
AB
Rear track91,5151,5151,5151,515
BED interior length10 1,3251,3251,3251,325
BED interior width111,4701,4701,4701,470
BED interior height12 405405405405
Cargo floor height (unladen)13 850850850850
Vehicle
weight kg
Kerb weight1,8601,9201,9301,940
Max. gross vehicle weight2,5352,6052,6052,605
Max. axle weight rating-front1,2501,2501,2501,250
Max. axle weight rating-rear1,6001,6001,6001,600
Seating capacity5555
EngineModel No.4D56 DI-D
(Direct
Injection-Dies
el) engine
with Inter
cooler, Turbo
charger
4M41 DI-D
(Direct
Injection-Die
sel) engine
with Inter
cooler, Turbo
charger
4M41 DI-D
(Direct
Injection-Die
sel) engine
with Inter
cooler, Turbo
charger
Total displacement mL2,4773,2003,2003,200
Max. output kW (PS)/rpm100
(136)/4,000
Max. torque N⋅ m/rpm314
(32)/2,000
118
(160)/3,800
343
(35)/2,000
118
(160)/3,800
343
(35)/2,000
4M41 DI-D
(Direct
Injection-Die
sel) engine
with Inter
cooler, Turbo
charger
118
(160)/3,800
343
(35)/2,000
GENERAL
PRECAUTIONS BEFORE SERVICE
ItemsKB4TKB8T
GJNHZRUGJNHZRUGJNXZRUGJRXZRU
Transmission Model No.V5MB1V5MB1V5MB1V4A5A
Type5-speed
manual
Fuel systemFuel supply systemElectrical fuel
injection
(common rail
engine
control
system)
Max speed km/h175175175175
Turning radius m5.95.95.95.9
5-speed
manual
Electrical fuel
injection
(common rail
engine
control
system)
5-speed
manual
Electrical
fuel injection
(common rail
engine
control
system)
00-23
4-speed
automatic
Electrical
fuel injection
(common rail
engine
control
system)
PRECAUTIONS BEFORE SERVICE
SUPPLEMENTAL RESTRAINT SYSTEM
(SRS) AND SEAT BELT WITH
PRE-TENSIONER
M1001011600238
CAUTION
Items to review when servicing SRS:
1. Be sure to read GROUP 52B − Supplemental
Restraint System (SRS). For safe operation,
please follow the directions and heed all
warnings.
2. Wait at least 60 seconds after disconnecting
the battery cable before doing any further
work. The SRS system is designed to retain
enough voltage to deploy the air bag even
after the battery has been disconnected. Seri
ous injury may result from unintended air bag
deployment if work is done on the SRS sys
tem immediately after the battery cable is disconnected.
3. Warning labels must be heeded when servic-
ing or handling SRS components. Warning
labels can be found in the following locations.
• SRS air bag control unit (SRS-ECU)
• Front impact sensor
• Clock spring
• Driver's and front passenger's air bag
modules
• Seat belt with pre-tensioner
4. Always use the designated special tools and
test equipment.
5. Store components removed from the SRS in a
clean and dry place. The air bag module
should be stored on a flat surface and placed
-
so that the pad surface is facing upward. Do
not place anything on top of it.
6. Never attempt to disassemble or repair the
SRS components (SRS-ECU, air bag module
and clock spring).
7. Whenever you finish servicing the SRS, check
the SRS warning lamp operation to make sure
that the system functions properly.
8. Be sure to deploy the air bag before dispos-
ing of the air bag module or disposing of a
vehicle equipped with an air bag (Refer to
GROUP 52B
dures).
Observe the following when carrying out operations on places where SRS components are
installed, including operations not directly
related to the SRS air bag.
1. When removing or installing parts, do not
allow any impact or shock to the SRS compo
nents.
2. If heat damage may occur during paint work,
remove the SRS-ECU, the air bag module,
clock spring, the front impact sensor, and the
seat belt pre-tensioner.
• SRS-ECU, air bag module, clock spring,
front impact sensor: 93
• Seat belt pre-tensioner: 90 ° C or more
− Air Bag Module Disposal Proce-
° C or more
-
00-24
PRECAUTIONS BEFORE SERVICE
GENERAL
WHAT THE COMMON RAIL ENGINE LEARNS
After fuel-related parts are replaced, the common rail
engine must register their identification codes with
the engine-ECU and execute learning.
The table below shows what should be registered
and learned after each type of operation.
Correspondence table
Registration and
learning item
Injector identification
code registration
Small injection quantity
learning
Supply pump correction
learning
Operation type
Injector replacementSupply pump
replacement
appricable
appricable
−
−
−
appricable
M1001012500018
NOTE: When the engine-ECU is replaced, collect in
advance the injector identification code from the cur
rent engine-ECU. Doing it makes registration easy.
Engine-ECU
replacement
appricable
appricable
−
-
REGISTRATION AND LEARNING PROCEDURE
Injector identification code registration
Refer to P.00-24, INJECTOR IDENTIFICATION
CODE REGISTRATION PROCEDURE.
Small injection quantity learning
Refer to P.00-25, SMALL INJECTION QUANTITY
LEARNING PROCEDURE.
Supply pump correction learning
Refer to P.00-26, SUPPLY PUMP CORRECTION
LEARNING PROCEDURE.
1. If the injector identification code is not regis-
tered, the engine warning lamp goes on and
diagnosis code No. P1626 is logged.
2. Failure to register the injector identification
code correctly will cause rough idling, abnor
mal noise, and emission deterioration.
PURPOSE
Identification code
-
Because individual injectors have different injection
characteristics, the engine-ECU corrects injection
time for each cylinder to improve injection accuracy.
For this reason, when the injector or engine-ECU is
replaced, injector correction data must be registered
afterwards in the engine-ECU using the Multi Use
Tester III (M.U.T.-III).
Correction data is converted into an identification
code consisting of 30 alphanumeric characters and
printed on the injector connector.
AK501491
M1001012600015
AB
GENERAL
PRECAUTIONS BEFORE SERVICE
00-25
REGISTRATION PROCEDURE
1. When replacing the engine-ECU, connect the
current engine-ECU to the body harness.
NOTE: This operation is purposed to read the injector identification code stored in the engine-ECU.
Reading the identification code in this way before
replacement can eliminate manual input of the identi
fication code after replacement.
2. After the ignition switch is in "LOCK" (OFF)
position, connect the M.U.T.-III to the diagnosis
connector.
3. Turn the ignition switch to "ON" position.
4. Select SPECIAL FUNCTION from the function
menu.
5. When the current engine-ECU is still mounted,
read and register the injector identification code
as follows:
(1) Select Read Injector ID Code (for engine-ECU
replacement) from the SPECIAL FUNCTION
menu.
(2) Select Write and Save Injector ID Code from
the menu to read data from the current
engine-ECU and save the data if it could be
read normally.
(3) Mount the new engine-ECU on the vehicle.
(4) Select SPECIAL FUNCTION from the function
menu.
(5) Select Write Injector ID Code (for engine-ECU
replacement) from the SPECIAL FUNCTION
menu.
(6) Select SAVED INJECTOR ID WRITING from
the Write Injector ID Code menu to write the
data, which was saved previously, to the
engine-ECU.
6. If the injector has been replaced or data has not
been read from the current engine-ECU, register
the injector identification code as follows:
(1) Select Write Injector ID Code from the
SPECIAL FUNCTION menu.
(2) If the injector was replaced, specify whether to
write to every cylinder or a specific cylinder.
Frame 1
(4 digits)
Frame 2
(4 digits)
-
Frame 3
(4 digits)
Frame 5
(4 digits)
Frame 7
(4 digits)
Frame 4
(4 digits)
Frame 6
(4 digits)
Frame 8
(2 digits)
AK501492
AB
(3) Select the write mode from the menu, enter
the identification code printed on the injector,
and execute writing.
CAUTION
Even if the number of the cylinder to be registered does not match the actual injector mounting location, registration ends normally. Specify
the cylinder number correctly.
NOTE: The identification code is displayed in order
of the frame numbers when it is read.
7. Makes sure that the engine warning lamp that is
on changes to blinking, indicating the registration
is complete.
NOTE: When the injector is replaced, executing the
write operation also clears the values of small injec
tion quantity learning.
8. Execute small injection quantity learning.
Refer to P.00-25, the SMALL INJECTION
QUANTITY LEARNING PROCEDURE for the
learning procedure.
9. Confirm that the engine warning lamp is off.
Confirm also that the diagnosis code is not stored.
-
SMALL INJECTION QUANTITY LEARNING PROCEDURE
CAUTION
1. If small injection quantity learning has not
been executed, the engine warning lamp
blinks.
2. When the requirements for learning are satis-
fied by operation after replacement of the
engine-ECU, learning is automatically exe
cuted even if no instruction is given from the
M.U.T.-III. Accordingly, the malfunction indica
tor lamp goes off. However, the learning thus
executed is tentative and limited. Be sure to
complete leaning using the M.U.T.-III.
PURPOSE
To keep emission and noise level at adequate levels,
the engine-ECU must learn injector fuel injection in
idle mode.
During learning, the engine-ECU calculates actual
injection from each cylinder based on changes in
engine speeds and corrects pilot injection control. It
then keeps records of this amount of correction as a
learned value.
-
For this reason, after the engine-ECU or injector is
replaced, learning must be executed using the
M.U.T.-III.
M1001014300010
00-26
GENERAL
PRECAUTIONS BEFORE SERVICE
NOTE: Engine friction changes or injector deterioration over time may cause fluctuation in pilot injection.
After use over time, it may prevent injection of an
accurate amount of fuel according to the indication
by the engine-ECU. This is why learning must be
executed again periodically.
For this reason, the engine-ECU periodically leans
injection according to the cumulative mileage.
Note that making the M.U.T.-III learn again resets the
cumulative mileage.
NOTE: The engine sound may change or idling
engine speeds may increase during injection learn
ing. These are not abnormalities.
-
LEARNING PROCEDURE
1. After the ignition switch is in "LOCK" (OFF)
position, connect the M.U.T.-III to the diagnosis
connector.
2. Put the vehicle in the following idling stable
conditions:
• Engine coolant temperature: 80 − 90°C
• Automatic transmission fluid temperature: 60° C
or higher
• Lamps, A/C condenser fan and all accessories:
OFF
• Transmission: Neutral <M/T>, "P" range <A/T>
• Power steering: Static state
3. Select SPECIAL FUNCTION from the function
menu.
4. Select SMALL INJECTION QUANTITY
LEARNING from the SPECIAL FUNCTION menu
to execute learning.
CAUTION
If the vehicle conditions go out of the learning
conditions during idling, learning is interrupted.
To reexecute learning, the ignition switch
must once be turned off.
5. Continue idling for about 3 minutes before
learning is completed.
6. Confirm that the engine warning lamp is off. If it
still blinks, reexecute learning.
SUPPLY PUMP CORRECTION LEARNING PROCEDURE
PURPOSE
The engine-ECU learns the relation between the
suction control valve (linear solenoid valve) of the
supply pump drive current and the fuel injection vol
ume.
The learning value is calculated from the suction
control valve drive current and the rail pressure sen
sor output voltage.
When the supply pump is replaced, therefore, this
learning must be executed.
Re-learning is executed when the engine is idling
after the learning value in the engine-ECU has been
reset by the M.U.T.-III.
M1001014400017
-
GENERAL
PRECAUTIONS BEFORE SERVICE
LEARNING PROCEDURE FOR IDLING
After the ignition switch is in "LOCK" (OFF) position,
connect the M.U.T.-III to the diagnosis connector.
1. Turn the ignition switch to "ON" position. (Do not
start the engine.)
2. Select SPECIAL FUNCTION from the function
menu.
3. Select SUPPLY PUMP CORRECTION
LEARNING from the SPECIAL FUNCTION menu
and execute the initializing of the learning value.
4. After initializing, run the engine at idle in the
following conditions.
• Accelerator pedal: OFF
• Engine coolant temperature: 60° C or higher
• Fuel temperature: 30° C or higher
5. Confirm that the item No. 65 High pressure pump
learned status on M.U.T.-III Service Data is "2".
NOTE: "2" indicates that the learning has completed.
00-27
M1001014500014
APPLICATION OF ANTI-CORROSION
AGENTS AND UNDERCOATS
M1001011000173
If oil or grease gets onto the oxygen sensor, it will
cause a drop in the performance of the sensor.
Cover the oxygen sensor with a protective cover
when applying anti-corrosion agents and undercoats.
VEHICLE WASHING
M1001012000206
Approximately 40 cm
SERVICING ELECTRICAL SYSTEM
M1001011900217
CAUTION
Before connecting or disconnecting the negative
(
−) cable, be sure to turn off the ignition switch
and the lighting switch (If this is not done, there
is the possibility of semiconductor parts being
damaged).
AC300693
Before replacing a component related to the electrical system and before undertaking any repair procedures involving the electrical system, be sure to first
disconnect the negative (
−) cable from the battery in
order to avoid damage caused by short-circuiting.
VEHICLES WITH SEMI AUTOMATIC AIR
CONDITIONER
M1001011300055
CAUTION
Never start the engine with the refrigerant system
empty as it will damage the A/C compressor.
AC300832
AB
If high-pressure car-washing equipment or steam
car-washing equipment is used to wash the vehicle,
be sure to note the following information in order to
avoid damage to plastic components, etc.
• Spray nozzle distance: Approximately 40 cm or
more
• Spray pressure: 3,900 kPa or less
• Spray temperature: 82°C or less
• Time of concentrated spray to one point: within
30 sec.
PRE-INSPECTION CONDITION
M1001012100117
"Pre-inspection condition" refers to the condition that
the vehicle must be in before proper engine inspec
tion can be carried out. If you see the words "Set the
vehicle to the pre-inspection condition" in this man
ual. It means to set the vehicle to the following condition.
• Engine coolant temperature 80 to 90° C
• Lamps, electric cooling fan and all accessories:
OFF
• M/T: Neutral
• A/T: N range
-
-
00-28
GENERAL
PRECAUTIONS BEFORE SERVICE
MULTI USE TESTER (M.U.T.-III) SUB
ASSEMBLY
M1001012400011
MULTI USE TESTER (M.U.T.-III)
sub assembly
Vehicle communication interface (V.C.I.)
MB991824
M.U.T.-III USB cable
MB991827
M.U.T.-III main harness A
MB991910
M.U.T.-III main harness B
CAUTION
Diagnosis
connector
MB991910
MB991824
MB991827
AC501413
AB
Turn the ignition switch to the "LOCK" (OFF)
position before connecting or disconnecting the
M.U.T.-III.
Connect the M.U.T.-III to the diagnosis connector as
shown in the illustration.
Do not use
MB991911
M.U.T.-III measurement adapter
MB991825
M.U.T.-III trigger harness
MB991826
AC305090
AI
Refer to the "M.U.T.-III OPERATION MANUAL" for
instructions on handling the M.U.T.-III.
HOW TO USE THE THROTTLE
CONTROLLER
M1001009300014
As for a vehicle with the electronic control throttle
*
, engine operations such as racing can not be
valve
performed from outside the vehicle. Thus, the throttle
valve controller (MB991791) is provided as a special
tool to enable the engine operation from outside the
vehicle.
NOTE: *: A vehicle with the accelerator pedal position sensor (APS) installed to the accelerator pedal
THE THROTTLE CONTROLLER
CONNECTION
APS harness
side connector
MB991894
MB991791
AC103781
AC
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