Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 90
4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS
6E–355
29
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 30
30
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 31
31
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 32
32
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 33
Go to Step 34
33
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
—
Step
Action
Value(s)
Yes
No
6E–356
4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS
34
Replace the injection pump assembly.
Is the action complete?
—
Verify repair
—
Step
Action
Value(s)
Yes
No
4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS
6E–357
CUTS OUT, MISSES SYMPTOM
DEFINITIONS: Steady pulsation or jerking that follows
engine speed; usually more pronounced as engine load
increases.
time
rpm
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 5
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
6E–358
4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS
7
1. Using the Tech 2, perform test drive.
2. Monitor the “Vehicle Speed” in the data display.
Does the Tech 2 indicate correct “Vehicle Speed”
depending on driving speed?
—
Go to Step 11
Go to Step 8
8
Check the VSS 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 9
9
Substitute a known good VSS and recheck.
Was the problem solved?
—
Go to Step 10
Go to Step 31
10
Replace the VSS assembly.
Is the action complete?
—
Verify repair
—
11
1. Using the Tech 2, ignition “On” and engine “Run”.
2. Monitor the “Mass Air Flow” in the data display.
Does the Tech 2 indicate correct “Mass Air Flow”
depending on accelerator pedal operation?
—
Go to Step 16
Go to Step 12
12
Remove the MAF & IAT sensor assembly and check
for the following conditions.
• Objects blocking at the MAF sensor element.
If a problem is found, repair as necessary.
Was the problem found?
—
Verify repair
Go to Step 13
13
Check the MAF 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 14
14
Substitute a known good MAF & IAT sensor assembly
and recheck.
Was the problem solved?
—
Go to Step 15
Go to Step 31
15
Replace the MAF & IAT sensor assembly.
Is the action complete?
—
Verify repair
—
Step
Action
Value(s)
Yes
No
When constant vehicle speed
High
Correct Speed
Low
Time
Unstable Data
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