2007 ISUZU KB P190 light

Engine Control System (4JH1) 6E-265
Checks Action
Fuel System Checks Inspect the fuel system for the following conditions. Refer to the Fuel System section.
• Inspect for water contamination in the fuel.
• Inspect for external fuel leaks or fuel leakage into the engine oil.
• Inspect the fuel lines between the fuel tank and fuel injection pump for tightness and
all fuel hoses for cuts, cracks and for the use of proper clamps.
Notice: The fuel system from the fuel tank(s) to the fuel injection pump is under a
slight vacuum with the engine running. As a result, air can enter the fuel system if
these connections are not tight. Air in the fuel system will cause fuel injection pump
internal pressure fluctuations especially at high engine speed and load.
• Inspect for air in the fuel system.
Notice: If many air bubbles appear in the fuel, check the fuel system line connections
between the fuel tank and the fuel injection pump for tightness and all fuel hoses for
cuts, cracks and for the use of proper clamps.
a. Remove the fuel hose that connects to the fuel injection pump suction side.
b. Substitute a clear hose.
Notice: A hose must be cleaned.
c. Connect the clear hose to the fuel injection pump.
d. Bleed the fuel system.
e. Let the engine run at idle for at least 2 minutes.
f. Accelerator the engine between idle and W .O.T. (accelerator pedal full travel) many times while observing the clear hose.
• Inspect the fuel tank vent hose for a plugged or kinked.
• Inspect inside the fuel tank for any foreign material that may be getting drawn into
the fuel line pickup causing a blocked condition. Draw fuel from the fuel tank at the
fuel line (as close to the fuel tank as possible) going to the fuel pickup tube to verify a
clean stream of fuel comes out (use the hand-held vacuum pump 5-8840-0279-0/J-
23738-A with a clear hose or equivalent). This will ensure the fuel pickup tube is not
cracked drawing air into the fuel line.
• Inspect the fuel injection pump operation.
Notice: The fuel injection pump must be timed to the engine.
• Inspect the eye bolt for any type of restriction or collapsed gauze filter.
Notice: If any type of restriction found, check for a condition that causes contaminated
fuel, such as the customer is using an aftermarket fuel filter or extended maintenance
interval. Also inspect fuel waxing or icing that is caused by an incorrect fuel type used
in winter season or water intrusion in the fuel system.
• Inspect the fuel injection nozzle(s) for proper splay condition or operating pressure.
Notice: Only first stage of operating pressure can be checked.
• Inspect the timing device operating correctly. Observe the Actual Injection Timing
parameter with the scan tool while running the engine. The Actual Injection Timing
parameter must follow the Desired Injection Timing within 2°CA on each engine
speed. Engine idle > around 2000 RPM> around 3000 RPM. If not, inspect the fuel
system restriction, air in the fuel or fuel injection pump operation.
Air Intake System Checks Inspect the air intake system for the following conditions.
• Inspect the air cleaner and air intake ducts for a restriction, holes, or leaks.
• Inspect for a restriction in the turbocharger inlet duct.
• Inspect for a restriction or deposit in the intake throttle bore.
• Inspect for a restriction or leak in the intake manifold.
• Inspect for a restriction or damage at MAF sensor.
Additional Checks •
Inspect the generator output voltage. Repair if less than 9 volts or more than 16
volts.
• Inspect the EGR system operating correctly.
• Inspect the A/C operation.
• Inspect the torque converter clutch (TCC) operation. (A/T only)



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ISUZU KB P190 2007

Engine Control System (4JH1) 6E-267
Checks Action
Fuel System Checks Inspect the fuel system for the following conditions. Refer to the Fuel System section.
• Inspect for water contamination in the fuel.
• Inspect for external fuel leaks or fuel leakage into the engine oil.
• Inspect the fuel lines between the fuel tank and fuel injection pump for tightness and
all fuel hoses for cuts, cracks and for the use of proper clamps.
Notice: The fuel system from the fuel tank(s) to the fuel injection pump is under a
slight vacuum with the engine running. As a result, air can enter the fuel system if
these connections are not tight. Air in the fuel system will cause fuel injection pump
internal pressure fluctuations especially at high engine speed and load.
• Inspect for air in the fuel system.
Notice: If many air bubbles appear in the fuel, check the fuel system line connections
between the fuel tank and the fuel injection pump for tightness and all fuel hoses for
cuts, cracks and for the use of proper clamps.
a. Remove the fuel hose that connects to the fuel injection pump suction side.
b. Substitute a clear hose.
Notice: A hose must be cleaned.
c. Connect the clear hose to the fuel injection pump.
d. Bleed the fuel system.
e. Let the engine run at idle for at least 2 minutes.
f. Accelerator the engine between idle and W .O.T. (accelerator pedal full travel) many times while observing the clear hose.
• Inspect the fuel tank vent hose for a plugged or kinked.
• Inspect inside the fuel tank for any foreign material that may be getting drawn into
the fuel line pickup causing a blocked condition. Draw fuel from the fuel tank at the
fuel line (as close to the fuel tank as possible) going to the fuel pickup tube to verify a
clean stream of fuel comes out (use the hand-held vacuum pump 5-8840-0279-0/J-
23738-A with a clear hose or equivalent). This will ensure the fuel pickup tube is not
cracked drawing air into the fuel line.
• Inspect the fuel injection pump operation.
Notice: The fuel injection pump must be timed to the engine.
• Inspect the eye bolt for any type of restriction or collapsed gauze filter.
Notice: If any type of restriction found, check for a condition that causes contaminated
fuel, such as the customer is using an aftermarket fuel filter or extended maintenance
interval. Also inspect fuel waxing or icing that is caused by an incorrect fuel type used
in winter season or water intrusion in the fuel system.
Inspect the fuel injection nozzle(s) for proper splay condition or operating pressure.
Notice: Only first stage of operating pressure can be checked.
• Inspect the timing device operating correctly. Observe the Actual Injection Timing
parameter with the scan tool while running the engine. The Actual Injection Timing
parameter must follow the Desired Injection Timing within 2°CA on each engine
speed. Engine idle > around 2000 RPM> around 3000 RPM. If not, inspect the fuel
system restriction, air in the fuel or fuel injection pump operation.
Air Intake System Checks Inspect the air intake system for the following conditions.
• Inspect the air cleaner and air intake ducts for a restriction, holes, or leaks.
• Inspect for a restriction or leak in the intercooler.
• Inspect for a restriction in the turbocharger inlet duct.
• Inspect for a restriction or deposit in the intake throttle bore.
• Inspect for a restriction or leak in the intake manifold.
• Inspect for a restriction or damage at MAF sensor.
• Inspect for a worn or damaged turbocharger turbine wheel, shaft or compressor
wheel. Refer to turbocharger inspection in the Engine Mechanical section.
• Inspect for turbocharger wastegate valve operation. Refer to wastegate valve
inspection in the Engine Mechanical section.
Exhaust System Checks Inspect the exhaust system for a possible restriction. Refer to the Exhaust System
section.
• Inspect for a restriction in the catalytic converter or exhaust pipes.

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ISUZU KB P190 2007

Engine Control System (4JH1) 6E-269
Checks Action
Fuel System Checks Inspect the fuel system for the following conditions. Refer to the Fuel System section.
• Inspect for water contamination in the fuel.
• Inspect for external fuel leaks or fuel leakage into the engine oil.
• Inspect the fuel lines between the fuel tank and fuel injection pump for tightness and
all fuel hoses for cuts, cracks and for the use of proper clamps.
Notice: The fuel system from the fuel tank(s) to the fuel injection pump is under a
slight vacuum with the engine running. As a result, air can enter the fuel system if
these connections are not tight. Air in the fuel system will cause fuel injection pump
internal pressure fluctuations especially at high engine speed and load.
• Inspect for air in the fuel system.
Notice: If many air bubbles appear in the fuel, check the fuel system line connections
between the fuel tank and the fuel injection pump for tightness and all fuel hoses for
cuts, cracks and for the use of proper clamps.
a. Remove the fuel hose that connects to the fuel injection pump suction side.
b. Substitute a clear hose.
Notice: A hose must be cleaned.
c. Connect the clear hose to the fuel injection pump.
d. Bleed the fuel system.
e. Let the engine run at idle for at least 2 minutes.
f. Accelerator the engine between idle and W .O.T. (accelerator pedal full travel) many times while observing the clear hose.
• Inspect the fuel tank vent hose for a plugged or kinked.
• Inspect inside the fuel tank for any foreign material that may be getting drawn into
the fuel line pickup causing a blocked condition. Draw fuel from the fuel tank at the
fuel line (as close to the fuel tank as possible) going to the fuel pickup tube to verify a
clean stream of fuel comes out (use the hand-held vacuum pump 5-8840-0279-0/J-
23738-A with a clear hose or equivalent). This will ensure the fuel pickup tube is not
cracked drawing air into the fuel line.
• Inspect the fuel injection pump operation.
Notice: The fuel injection pump must be timed to the engine.
• Inspect the eye bolt for any type of restriction or collapsed gauze filter.
Notice: If any type of restriction found, check for a condition that causes contaminated
fuel, such as the customer is using an aftermarket fuel filter or extended maintenance
interval. Also inspect fuel waxing or icing that is caused by an incorrect fuel type used
in winter season or water intrusion in the fuel system.
• Inspect the fuel injection nozzle(s) for proper splay condition or operating pressure.
Notice: Only first stage of operating pressure can be checked.
• Inspect the timing device operating correctly. Observe the Actual Injection Timing
parameter with the scan tool while running the engine. The Actual Injection Timing
parameter must follow the Desired Injection Timing within 2°CA on each engine
speed. Engine idle > around 2000 RPM> around 3000 RPM. If not, inspect the fuel
system restriction, air in the fuel or fuel injection pump operation.
Air Intake System Checks Inspect the air intake system for the following conditions.
• Inspect the air cleaner and air intake ducts for a restriction, holes, or leaks.
• Inspect for a restriction or leak in the intercooler.
• Inspect for a restriction in the turbocharger inlet duct.
• Inspect for a restriction or deposit in the intake throttle bore.
• Inspect for a restriction or leak in the intake manifold.
• Inspect for a restriction or damage at MAF sensor.
• Inspect for a worn or damaged turbocharger turbine wheel, shaft or compressor
wheel. Refer to turbocharger inspection in the Engine Mechanical section.
• Inspect for turbocharger wastegate valve operation. Refer to wastegate valve
inspection in the Engine Mechanical section.
Exhaust System Checks Inspect the exhaust system for a possible restriction. Refer to the Exhaust System
section.
• Inspect for a restriction in the catalytic converter or exhaust pipes.

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ISUZU KB P190 2007

6E-276 Engine Control System (4JH1)
1. Connect the scan tool to the vehicle DLC, with theengine and the scan tool OFF.
2. Turn ON the scan tool.
3. Select Diagnostic > appropriate vehicle identification > Powertrain > 4JH1-TC >
Programming > Program VIN.
4. Input correct VIN reading from stamped VIN o
r
affixed VIN plate on the vehicle.
Select Lock ECU and lock the programmed VIN.

Service Programming System (SPS)
Description
The service programming system (SPS) allows a
technician to program a control module through the data
link connector (DLC). The information transfer circuit that
is used at the DLC is the same serial data circuit used be
the scan tool for retrieving diagnostic trouble codes
(DTCs), displaying data, clearing DTCs etc. This
procedure offers the ability to install software/calibrations
matched to a particular vehicle.
Most control modules have two types of memory. The
software/calibrations reside in the flash memory. The two
types of memory are listed below: • Electrically Erasable Programmable Read Onl
y
Memory (EEPROM).
This type of memory allows selected portions o
f
memory to be programmed while other portions
remain unchanged.
Certain learned values reside in the EEPROM, such as:
- The vehicle identification number (VIN)
- The software/calibrations identification numbers
- The control module security information
• Flash Read Only Memory-Flash Memory
Flash memory has increased memory storage capacity. During programming, all information within
this type of memory is erased, and then replaced
with entirely new information.

Service Programming Methods
The two methods of programming an engine control
module (ECM) are listed below: • Remote Programming
• Pass Thru Programming
For information on programming an ECM using one o
f
the methods listed above, refer to Service Programming
System (SPS) (Remote Procedure) or Service
Programming System (SPS) (Pass-Thru Procedure).


Before Programming a Control Module
Important:
DO NOT program an existing ECM with the identical
software/calibration package. This procedure is not a
short cut to correct the driveability condition. This is an
ineffective repair. An ECM should only be programmed
when the following occurs: • W hen a service procedure instructs you to replace
the ECM. W hen the ECM from another vehicle is
installed, VIN must be changed. And change
vehicle information as necessary such as type o
f
transmission.
• An updated software/calibrations is released.
Ensure that the following conditions are met before
programming an ECM: • The scan tool PCMCIA card is programmed with
the latest software.
• The TIS 2000 is installed with the latest software.
• The hardware key is plugged into the compute
r
port.
• Vehicle system voltage:
- There are no charging system concerns. All charging system concerns must be repaired
before programming the ECM.
- The battery voltage is greater than 12 volts bu
t
less than 16 volts. The battery must be fully
charged before programming the ECM.
-
A battery charger is NOT connected to the
vehicles battery. Incorrect system voltage o
r
voltage fluctuations from a battery charger may
cause programming failure or ECM damage.
- Turn OFF or disable any system that may put a load on the vehicles battery. Turn OFF o
r
disable systems such as:
◊ Heating, ventilation, and air conditioning
(HVAC) systems
◊ Headlights
◊ Room lights
◊ Accessory equipment
• The ignition switch is in the proper position. The
scan tool prompts you to turn ON the ignition, with
the engine OFF. DO NOT change the position o
f
the ignition switch during the programming
procedure unless instructed to do so.
• All tool connections are secure:
- The RS-232 cable
- The connection at the DLC
- The voltage supply circuits


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ISUZU KB P190 2007

Engine Control System (4JH1) 6E-277
• DO NOT disturb the tool harnesses while
programming. If an interruption occurs during the
programming procedure, programming failure o
r
ECM damage may occur.
• If you are performing the Pass-Thru programming
procedure using a notebook computer without the
power cord, ensure that the internal battery is full
y
charged.

Service Programming System (SPS)
(Remote Procedure)
The Remote Service Programming System (SPS)
method is a three-step process that involves the
following procedures: 1. Connecting the scan tool to the vehicle and obtaining the information from the engine control
module (ECM).
2. Connecting the scan tool to the terminal and downloading a new calibration file from the terminal
into the scan tool memory.
3. Reconnecting the scan tool to the vehicle and uploading the new calibration file into the ECM.
Performing the Remote Procedure 1. Connect the scan tool to the vehicle and obtain the ECM information using the following procedure:
Important:
Ensure the ECM is installed in the vehicle and the batter
y
is fully charged before programming. a. Connect the scan tool to the vehicle data linkconnector (DLC), with the engine and the scan
tool OFF.
b. Turn ON the scan tool.
c. Press Enter at the title screen.
d. Turn ON the ignition, with the engine OFF.
e. Select Service Programming System at the Main Menu.
f. Select Request Info.
g. If there is already stored in the scan tool, the existing data is displayed on the screen. The
scan tool asks user to keep existing data Keep
Data or Continue to request new vehicle
information from the ECM. If there is no data in
the scan tool, it will immediately start vehicle
identification.
h. Enter the vehicle description by following the on- screen instructions based on stamped VIN o
r
affixed VIN plate on the vehicle.
i. During obtaining information, the scan tool is
receiving information from any modules at the
same time. But only ECM information is
displayed on the screen.
j. Turn OFF all accessories and select Continue.
k. Verify that the correct VIN is entered on the scan tool. If the VIN is incorrect, write down the
correct VIN.
2. Turn OFF the scan tool.
3. Disconnect the scan tool from the vehicle.
4. Turn OFF the ignition.
5. Transfer the data from the terminal to the scan tool using the following procedure:
Important:
The TIS supports service programming with the scan
tool scan tool only. a. Connect the scan tool to the terminal.
b. Launch the TIS application at the terminal.
c. Select the Service Programming System at the main screen.
d. Highlight the following information on the Selec
t
Diagnostic Tool and Programming Process
screen: • Select Diagnostic Tool-Select scan tool.
• Select Programming Process-Identif
y
whether an existing ECM is being
reprogrammed or an ECM is being
replaced with a new one.
• Select ECU Location-Select Vehicle.
e. Select Next.
f. Verify the connections on the Preparing fo
r
Communication screen and select Next.
g. Verify the VIN on the Validate Vehicle Identification Number (VIN) screen and selec
t
Next.
Important:
If the ECM is replaced to new one, VIN does no
t
displayed. Input correct VIN reading from stamped VIN
or affixed VIN plate on the vehicle. If the ECM from
another vehicle is installed, input correct VIN by same
way.
h. Highlight Engine on the System Type screen and select Next, if requested.
i. Complete the following information based on the service ID plate on the Validate Vehicle
Data screen until Next is highlighted: • Model
• Model Year
• Engine
• Type of Transmission

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ISUZU KB P190 2007

6E-278 Engine Control System (4JH1)
• Destination Code
j. Select Next.
k. Verify your selection on the Summary screen.
Important:
Refer to Service Bulletins before service programming is
performed if the bulletins are listed along with the
calibration files.
Important:
Select Cancel if you receive a message stating that the
calibration selected is already the current calibration in
the ECM and reprogramming with the same download is
not allowed.
l. Select Reprog.
m. The Transfer Data screen will appear until the progress bar reaches 100%.
6. Close the application and return to the TIS application selection screen after the download is
complete.
7. Turn OFF the scan tool.
8. Disconnect the scan tool from the terminal.
9. Transfer the data from the scan tool to the ECM using the following procedure:
a. Connect the scan tool to the vehicle DLC, with the engine and the scan tool OFF.
b. Turn ON the scan tool.
c. Press Enter at the Title screen.
d. Turn ON the ignition, with the engine OFF.
e. Select Service Programming System.
f. Select the Program ECU on the scan tool.
g. Follow the on-screen instructions and select Continue.
h. Programming in Process will appear until the progress bar reaches 100%.
Important:
The vehicle fitted with automatic transmission, Check
Trans lamp may blink while programming the ECM since
communication between the ECM and TCM is
interrupted. Clear DTC in any module afte
r
programming.
i. Select Continue and exit the program after the scan tool displays Programming W as
Successful.
10. Turn OFF the ignition.
11. Turn OFF the scan tool.
12. Disconnect the scan tool from the vehicle.

Service Programming System (SPS) (Pass-
Thru Procedure)
Pass-Thru programming allows the scan tool to remain
connected to the terminal and to the vehicle throughou
t
the programming process. The vehicle must be in close
proximity to the terminal while using Pass-Thru.
Important:
The TIS supports service programming with the scan
tool scan tool only.
1. Launch the TIS application at the terminal.
2. Select the Service Programming System at the main screen.
3. Highlight the following information on the Selec
t
Diagnostic Tool and Programming Process screen:
• Select Diagnostic Tool-Select Pass-Thru
• Select Programming Process-Identify whethe
r
as existing engine control module (ECM) is
being reprogrammed or an ECM is being
replaced with a new one.
• Select ECU Location-Select Vehicle.
4. Select Next.
5. Complete all vehicle data on the Preparing fo
r
Communication/Determine Vehicle screen until
Next is highlighted.
6. Select Next.
7. Follow the instruction on the Preparing fo
r
Communication screen.
Important:
In order to reduce the potential for signal loss, the RS-
232 cable should not be more than 25 feet long.

8. Select Next.
9. Verify the VIN on the Validate Vehicle Identification Number (VIN) screen and select Next.
Important:
If the ECM is replaced to new one, VIN does no
t
displayed. Input correct VIN reading from stamped VIN
or affixed VIN plate on the vehicle. If the ECM from
another vehicle is installed, input correct VIN by same
way. 10. Highlight Engine on the System Type screen and
select Next, if requested.
11. Complete the following information based on the service ID plate on the Validate Vehicle Data
screen until Next is highlighted:
• Model
• Model Year
• Engine
• Type of Transmission
• Destination Code
12. Select Next.
13. Verify your selection on the Summary screen.


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ENGINE MECHANICAL (4JK1/4JJ1) 6A-5
EGR system
Based upon data, including water temperature, engine
speeds or engine loads, it is controlled via Engine
Control Module (ECM) to purify exhaust by recycling
part of it.
Its main components include an EGR valve, an EGR
cooler and various sensors.

Connecting rod cap bolt
The angular tightening method of the connecting rod
cap bolt further increases reliability and durability.

Fuel rail-type electronic control injection system
The fuel rail-type electronic control injection system is
composed of a fuel supply pump that sets the target
pressure of high-pressure fuel and supply it, a fuel rail
that measures such high-pressure fuel and a fuel
injector that turns it into a fine spray and injects it. Each
is controlled via ECM based upon various signals, while
injection timing or fuel injection quantity is controlled
under every possible driving condition.

Fuel injector
The fuel injector is a 6-hole nozzle that adjusts fuel
injection quantity or injection timing by opening o
r
closing an electromagnetic valve on the head of the fuel
injector.
ECM corrects the dispersion of fuel injection quantit
y
between fuel injector according to ID code data in
memory. At the replacement of fuel injector, ID code
data should be stored in ECM.


Fuel filter with sedimenter
It is a fuel filter with sedimenter that gets rid of water by
making use of the difference in specific gravity between
light oil and water, which comes with an indicator that
notifies you that it is filled with water.

Preheating system
The preheating system consists of the ECM, the glow
relay, glow plugs and the glow indicator lamp. The
preheating system is operated when the engine coolant
temperature is low, and makes the engine easy to start.

Lubrication system
It is an oil filter with full-flow bypass, which uses a
water-cool oil cooler and oil jet to cool the piston.

Functional inspection
Inspection/adjustment of valve clearance 1. Inspection of valve clearance
• Remove the fuel injector harness assembly.
• Remove the leak off hose.
• Remove the cylinder head cover.
• Rotate the crankshaft to make the No.1
cylinder meet the compression top dead cente
r
(TDC).





RTW 76ASH001301
Legend
1. TDC



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ENGINE MECHANICAL (4JK1/4JJ1) 6A-17



RTW 56ASH004401
Legend
1. Engine Hanger (Rear Side)

27.Hang wire on the engine hanger and hoist to lift up
the engine slightly.
28.Remove the engine mount.
• Remove the fastening bolts for the engine mount
on the engine side.
29.Remove the engine assembly.
• Hoist the engine slightly to provide space to
remove the catalytic converter.
Installation
Notice:
Be absolutely sure that each harness is reconnected to
its original position.
1. Install the engine assembly.
• Hang wire on the engine hanger and hoist to lift up
the engine.
• Operate a hoist slowly to move the engine to the
place where it is to be installed.
• Make the transmission side lower and operate a
hoist slowly, pulling it backward to the engine.
2. Install the engine mount.
Tightening torque: 48 N ⋅
⋅⋅
⋅
m (4.9kg ⋅
⋅⋅
⋅
m / 35 lb ft)
3. Remove the engine hanger.
4. Install the catalytic converter.
Tightening torque: 27 N ⋅
⋅⋅
⋅
m (2.8kg ⋅
⋅⋅
⋅
m /20 lb ft)
5. Install the front exhaust pipe. Tightening torque: 67 N ⋅
⋅⋅
⋅
m (6.8kg ⋅
⋅⋅
⋅
m / 49 lb ft)
6. Install the fuel hose on the feed and return sides.
7. Install the vacuum hose of brake master-vac.
8. Install the connector of the shift on the fly (4 ×4).
9. Install the harness of engine, battery and earth to the body side.
10.Install the power steering pump.
Tightening torque: 25 N ⋅
⋅⋅
⋅
m (2.5kg ⋅
⋅⋅
⋅
m / 18 lb ft)
• Install the bracket of power steering oil hose.
11.Install the A/C compressor.
Tightening torque: 25 N ⋅
⋅⋅
⋅
m (2.5kg ⋅
⋅⋅
⋅
m / 18 lb ft)
• Install the connector.
12.Install the A/C generator harness.
• Install the terminal B cable and the harness
connector to the generator.
13.Install the radiator.
Tightening torque: 25 N ⋅
⋅⋅
⋅
m (2.5kg ⋅
⋅⋅
⋅
m / 18 lb ft)
14.Install the fan assembly. Tightening torque: 8 N ⋅
⋅⋅
⋅
m (0.8kg ⋅
⋅⋅
⋅
m / 69 lb in)
15.Install the drive belt.
Refer to removal procedure for drive belt in this manual.
16.Install the fan guide.
17.Install the breather hose and lower hose of the radiator.
18.Install the engine harness clip (1).

RTW 76ASH001401
19.Install the radiator upper hose.
20.Install the intake hose (turbocharger -intercooler) (Standard output).
• Install the harness connector.


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