Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 175

 

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Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 175

 

 

6E–304

4JH1 ENGINE DRIVEABILITY AND EMISSIONS

10

Remove the CKP sensor from the flywheel housing
and check for the following conditions. 

• Objects sticking the CKP sensor. 

• Objects sticking the CKP sensor pulser. 
If a problem is found, repair as necessary. 
Was the problem found? 

—

Verify repair

Go to Step 11

11

Check the CKP sensor harness for the following
conditions. 

• Check for poor connector connection. 

• Check for misrouted harness. 

• Check for any accessory parts which may cause

electric interference. 

If a problem is found, repair as necessary. 
Was a problem found? 

—

Verify repair

Go to Step 12

12

Substitute a known good CKP sensor and recheck. 
Was the problem solved?

—

Go to Step 13

Go to Step 14

13

Replace the CKP sensor. 
Is the action complete?

—

Verify repair

—

14

Using the vacuum pump and check the exhaust
throttle valve (if equipped) operation for the following
condition. 

• Restrict shaft movement. Check for objects sticking

the shaft, broken diaphragm or excessive carbon
deposit. 

Was a problem found? 

—

Verify repair

Go to Step 15

15

Check the exhaust system for a possible restriction. 

• Damaged or collapsed pipes or catalytic converter. 

• Internal muffler failure. 
If a problem is found, repair as necessary. 
Was a problem found?

—

Verify repair

Go to Step 16

16

Visually/physically inspect for the following conditions. 

• Restrict fuel supply system. Check for a pinched

fuel hose/pipe. 

• Check for a condition that causes fuel waxing or

icing, such as the customer is using an incorrect
fuel type in winter season or water mixed with the
fuel. 

If a problem is found, repair as necessary. 
Was a problem found?

—

Verify repair

Go to Step 17

17

Replace the fuel filter. 
Was the problem solved?

—

Verify repair

Go to Step 18

Step

Action

Value(s)

Yes

No

4JH1 ENGINE DRIVEABILITY AND EMISSIONS

6E–305

18

Remove the eye bolt with gauze filter from the
injection pump and check for the following conditions. 

• Objects blocking at the gauze filter. Check for a

condition that causes contaminated fuel, such as
the customer is using an aftermarket fuel filter or
extended maintenance interval. 

• Check for a condition that causes fuel waxing or

icing, such as the customer is using an incorrect
fuel type in winter season or water mixed with the
fuel. 

If a problem is found, repair as necessary. 
Was the problem found?

—

Replace the eye 

bolt with gauze 

filter and verify 

repair

Go to Step 19

19

Check the engine compression pressure for each
cylinders. 
If a problem is found, repair as necessary. 
Was the problem found?

More than 30 

Mpa (31.0 kg/

cm

2

)

Verify repair

Go to Step 20

20

If the injection pump was replaced, are the timing
gears or injection pump correctly installed?

—

Go to Step 21

Repair as 

necessary

Step

Action

Value(s)

Yes

No

6E–306

4JH1 ENGINE DRIVEABILITY AND EMISSIONS

21

1. Review all diagnostic procedures within this table. 

2. If all procedures have been completed and no

malfunctions have been found, review/inspect the
following: 

• Visual/physical inspection 

• Tech 2 data 

• All electrical connections within a suspected circuit

and/or system 

Was a problem found?

—

Verify repair

Go to Step 22

22

Is the ECM programmed with the latest software
release? 
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”. 
Was the problem solved?

—

Verify repair

Go to Step 23

23

Substitute a known good ECM and recheck. 
Was the problem solved? 
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. 
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure. 

—

Go to Step 24

Go to Step 25

24

Replace the ECM. 
Is the action complete? 
IMPORTANT:  The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. 
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.

—

Verify repair

—

25

Replace the injection pump assembly. 
Is the action complete?

—

Verify repair

—

Step

Action

Value(s)

Yes

No

4JH1 ENGINE DRIVEABILITY AND EMISSIONS

6E–307

HARD START SYMPTOM

DEFINITIONS: Engine cranks, but does not start for a long time. Does eventually start, or may start and then
immediately stall.

Step

Action

Value(s)

Yes

No

1

Was  the  “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to Step 2

Go to On Board 

Diagnostic 

(OBD) System 

Check

2

1. Perform a bulletin search. 

2. If a bulletin that addresses the symptom is found,

correct the condition as instructed in the bulletin. 

Was a bulletin found that addresses the symptom?

—

Verify repair

Go to Step 3

3

Was a visually/physical check performed?

—

Go to Step 4

Go to Visual / 

physical Check

4

Is the customer using the incorrect fuel type? 

Diesel fuel 

only

Replace with 

diesel fuel

Go to Step 6

5

Visually/physically inspect for the following conditions. 

• Restrict air intake system. Check for a restricted air

filter element, or foreign objects blocking the air
intake system 

• Check for objects blocking or excessive deposits in

the throttle bore and on the throttle plate 

• Check for a condition that causes a large vacuum

leak, such as an incorrectly installed or faulty
crankcase ventilation hose.

• Restrict air intake system at the turbocharger.

Check for objects blocking the turbocharger
compressor wheel or turbine shaft sticking. 

If a problem is found, repair as necessary. 
Was a problem found?

—

Verify repair

Go to Step 6

6

Check the ECM & PSG grounds to verify that they are
clean and tight. Refer to the ECM wiring diagrams. 
Was a problem found?

—

Verify repair

Go to Step 7

7

1. Using the Tech 2, display the ECT sensor and IAT

sensor value. 

2. Check the displayed value.                                                                                               

Does the Tech 2 indicate correct temperature
depending on engine condition? 
If a problem is found, repair as necessary. 
Was the problem found?

—

Verify repair

Go to Step 8

8

1.  Using the Tech 2, display the FT sensor value. 

2. Check the displayed value. 

Does the Tech 2 indicate correct temperature
depending on engine condition? 
If a problem is found, repair as necessary. 
Was the problem found?

—

Go to Step 20

Go to Step 9

9

1. Using the Tech 2, ignition “On”. 

2. Monitor the “Glow Time Relay” in the data display. 

Does the Tech 2 indicate correct “Glow Time Relay”
status depending on the time from ignition switch
“On”? 
If a problem is found, repair as necessary. 
Was the problem found?

—

Go to Step 20

Go to Step 10

 

 

 

 

 

 

 

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