ISUZU N-Series 4JJ1 3.0L 2018 P06A3 Trouble Repair Solution

This instruction show you guide on how to solve ISUZU N-series 4JJ1 3.0L 2018 truck DTC P06A3 trouble solution.

The 5 volts reference circuit 4 is internal circuit of ECM.

 

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CONDITION FOR RUNNING THE DTC:

The ignition switch is ON.

 

CONDITION FOR SETTING DTC:

Either Of the Following Conditions Is Met:

1. The ECM detects that the 5 volts reference circuit 4 voltage is less than 4.8 volts.

2.The ECM detects that the 5 volts reference circuit 4 voltage is more than 5.2 volts.

 

ACTION TAKEN WHEN THE DTC SETS:

1. The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

2. The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Freeze Frame/Failure Records.

 

The ECM Apply Defaulted Warning Action And Fail-Safe Controls:

1. MIL:ON

2. Reduced Engine Power Indicator Lamp:ON

3. Cruise Control Inhibition

 

CONDITION FOR CLEARING THE DTC:

1 The ECM turns OFF the MIL after 3 consecutive driving cycles when the diagnostic runs and does not fail.

2 A current DTC clears when the diagnostic runs and passes.

3 A history DTC clears after 40 consecutive warm-up cycles,if no failures are reported after the ECM turns OFF the MIL

4 Use the diagnostic tool to clear the MIL and the DTC.

 

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ISUZU N-series Truck Exhaust Brake Solenoid Valve Removal and Installation Guide

Here is the instruction show you guide on how to remove and install exhaust break solenoid valve for ISUZU N-series truck 4JJ1 engine.

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Remove
1. Remove the rubber hoses (1).
2.Remove the exhaust brake solenoid valve.

ISUZU 4JJ1 Engine P0091 Fuel Pressure Regulator Control Circuit Low

This instruction show you guide on how to solve ISUZU 4JJ1 engine P0091 Fuel Pressure Regulator Control Circuit Low.

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P0091 DTC Information
1. DTC description

ISUZU 4JJ1 Engine Exhaust Pipe Remove and Installation Guide

Here is the instruction on how to remove and install exhaust pipe for ISUZU 4JJ1 enigne Euro 4 N series.

 

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Removal 

Remove the tail pipe.
1.Remove the clamps and tail pipe.
2. Remove the silencer.
3. Remove the front exhaust pipe B.
4. Remove the exhaust brake.Remove the vacuum hose and the exhaust brake assembly.
5. Remove the front exhaust pipe A.
6.Remove the clamp, and then remove the front pipe.

How to Remove EGR Valve Motor for ISUZU 4JJ1 Engine

This instruction show you guide on how to remove and install EGR valve motor for ISUZU 4JJ1 engine.

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Steps:
Removal:
1 Disconnect the battery cable negative terminal.
2 Disconnect the EGR valve connector.
3 Remove the EGR valve motor from the EGR valve.

How to Remove Fuel Supply Pump for ISUZU N Series Truck 4JJ1

This instruction show you guide on how to remove fuel supply pump for ISUZU N series Euro 4 4JJ1 engine truck.

Preparations:

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Procedures:
Including the inside of the injector, the holes and gaps that are the fuel paths for the fuel system have anextremely precise finish. Therefore, because there is the possibility of damage if foreign material becomes mixed in, cover the cap after removing parts, etc. to prevent the entry of foreign material.

Removal
1. Extract the coolant.
2. Remove the air intake duct and hose.
· Remove the boost sensor connector(1) and harness clip, and then remove the air intake duct together with the hose.
1
3. Remove the engine cover.
· Remove the PCV hose from the air cleaner outlet duct.
· Remove the oil fller cap, and remove the engine cover.
4. Remove the A/C compressor drive belt.
5. Disconnect the radiator upper hose.
6. Remove the air duct(air cleaner-turbocharger air duct).
7. Remove the left side noise cover.
·Disconnect the harness connector of the dropping register, and remove the noise cover.
8. Remove the A/C compressor.
· Remove the harness connector from the A/C compressor.
· Remove the compressor from the A/C compressor bracket. Fasten to any suitable position with a wire along with the hoses.
9. Remove the A/C compressor bracket.
10. Remove the left side fan guide bracket(1).
11. Remove the engine oil level gauge guide tube.
12. Remove the leak-off pipe(1).
13. Remove the fuel feed pipe(1).
NOTE: Do not reuse the fuel feed pipe
14. Remove the fuel hose(1).
· Keep the disconnected fuel hose in clean, so that should not adhere.
15. Remove the sleeve nut(1) of the injection pipe from the common rail.
NOTE: Do not reuse the injection pipe
16.Remove the common rail and the common rail bracket.
NOTE:
·Hold the common rail unit not the pressure limiter or pressure sensor.
·Be careful not to damage the pressure sensor connector.
17. Disconnect the injector harness connector(2) and leak-off hose(1).
18.Remove the cylinder head cover.
·Remove the vacuum sensor bracket and the EVRV bracket from the cylinder head cover.
NOTE: Do not damage the lip section of the oil seal with the connector of the injector.
19.Remove the A/C compressor adjust pulley.
20. Disconnect the camshaft position sensor connector(1) and the engine coolant temperature sensor connector(2).
Legend
1. Upper timing chain cover2. Lower timing chain cover
22. Rotate the crankshaft in the forward direction to align the first cylinder piston to the compression top dead center.
· Check the TDC alignment position using a mirror, etc.
23. Confirm that the camshaft bearing cap is aligned with the alignment position of the camshaft(1).

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ISUZU 4JJ4 Euro 4 N Series Truck Driver Belt Adjustment Guide

This instruction show you guide on how to inspect and adjust driver belt for ISUZU 4JJ4 euro truck.

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Inspection
Inspect the drive belt for wear or damage and replace it with a new one as necessary.
Also inspect the belt tension. Adjust the tension if necessary.
Inspection guidelines Press on the specified position on each belt with a pressure of 98 N(10 kg/22.05 Ib) to inspect the amount of belt tension.
measurement position.
·A/C compressor drive belt: middle of tension pulley and A/C compressor(1)
· Generator drive belt: middle of generator pulley and fan pulley(2)

How to Change Engine Oil for ISUZU 4HK1 Engine

This example show you guide on how to change engine oil for ISUZU 4HK1 engine heavy duty machine.

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When checking the engine oil, be sure to keep the equipment level and insert the dipstick fully.Prior to starting the engine, make sure to fill the engine oil to the MAX line through the oil filler opening.

If the equipment is not level, you can’t obtain an accurate oil level reading.Do not overfill the engine oil as this can damage the engine.


Procedures:
1. Remove the dipstick from the crankcase and wipe it clean with a clean cloth.
2. Reinsert the dipstick fully and gently remove it again
3. Check the oil level on the dipstick. The level must be between the Max level mark and the Min level mark.
4. If the level is above the Max mark, drain oil out until the level is between the Max and Min marks.
5. If the level is at or below the Min level mark, add oil until the level is at the Max mark.

9.2 Selecting the Proper Engine Oil
Use engine oil specifically designed for diesel engines. Use the chart below to determine the proper viscosity of oil to use for the anticipated ambient temperature the equipment will be operated in.

Prior to starting the engine, make sure a complete and thorough inspection is performed to check for any leaks.

Do not use this equipment if a leak is detected. Repair the leak before further use.Always check around hoses and fitting for signs of leaks.

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How to Remove Cylinder Head for ISUZU N Series

This instruction show you guide on how to remove cylinder head ISUZU N-series.More about ISUZU cases,please refer to ISUZU Trouble Repair.

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Procedures:

1. Drain the engine coolant.
2. Remove the generator.
Refer to "Generator"in Section 1E, Engine Electrical.
3. Remove the turbocharger assembly.
Refer to "Turbocharger Assembly"in Section 1J, Induction.
4. Remove the EGR cooler.

1F, Emission control.
5. Remove the water inlet upper pipe.
6. Disconnect the boost sensor connector(1) and harness clip.
7.Disconnect the air intake duct and hose between intercooler and intake throttle.
·Remove the pipe with hose assembled.
8. Remove the left side noise cover.
9. Disconnect the radiator upper hose.
10. Remove the A/C compressor drive belt.
11. Disconnect the A/C compressor.
· Disconnect the A/C compressor harness connector, remove the compressor from the A/
C compressor bracket, and fasten to any suitable position together with the hoses using a wire, etc.
12. Remove the A/C compressor bracket.
13.Remove the A/C compressor adjust pulley.
14.Remove the cylinder head cover.
Refer to "Cylinder Head Cover"in this Section.
15.Remove the engine oil level gauge tube.
16.Remove the injection pipes No.1 to 4.
17. Remove the heater hose.
· Remove the heater hose between the inlet manifold and cylinder block at the block side.
18. Remove the fan guide bracket(right side).
19. Disconnect the camshat position sensor connector(1) and the engine coolant temperature sensor connector(2).
20. Remove the timing chain cover.
a. Remove the lower cover(2).b. Remove the upper cover(1).
21. Remove the fuel injector.
Refer to "Injector"in Section 1D, Engine Fuel.
22. Remove the glow plug connector.
23. Remove the glow plugs.

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How to Inspect & Adjust Valve Clearance for ISUZU 4JJ1

This instruction show you guide on how to inspect and adjust valve clearance for Isuzu 4JJ1.

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Rotate the crankshaft in the forward direction to align the first cylinder piston to the compression top dead center(TDC).
Check the TDC alignment position using a mirror, etc.

Legend
1.Crankshaft pulley
2.Mirror
3.TDC alignment position
2.Adjustment of the valve clearance.
Loosen each adjust screw of the rocker arm.

Legend
1.Screwdriver
2.Ring spanner
3.Valve clearance adjust nut wrench Special Tool Valve clearance adjust nut wrench:
5-8840-2822-0
NOTE: Make sure to adjust while cool.

Insert a 0.15 mm(0.0059 in) thickness gauge between the rocker arm roller and the cam, and tighten the rocker arm adjust screw. When the movement of the thickness gauge becomes stiff, fasten the adjust screw nut of the rocker arm.

Legend
1. Cam: exhaust side
2. Cam: intake side
3. Roller: intake side
4. Roller: exhaust side
· When the first cylinder is at the compression top dead center,a circle is marked in the table; when the fourth cylinder is at the compression top dead center, an X is marked in the table for adjustment of valve clearance.


Compression pressure inspection
· Warm-up the engine.
· Remove the battery negative terminal and remove all glow plugs.
· Disconnect the injector harness connector.(this will prevent fuel injection.)


NOTE: When the harness connector is removed, the ECM determines a malfunction and records the DTC. After the end of measurement, be sure to clear the ECM memory.
(Refer to "Diagnostic Information and Procedures"in Section 1A, Engine Control System.)
· Connect the battery negative terminal.
· Engage the starter to discharge foreign materials from inside the cylinders.
· Install the compression gauge adaptor and the gauge.
NOTE: Before measuring the 4th cylinder, remove the EGR valve assembly, attach the adaptor and gauge and install the valve.(Refer to "EGR System"in Section 1F, Emission Control.)

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