Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 533

6 – 6 TROUBLESHOOTING

1500010302

FUEL IS BEING DELIVERED TO THE INJECTION PUMP

Checkpoint

Trouble

Cause

Countermeasure

Fuel

Use of the wrong fuel

Use the correct fuel

Water particles in the fuel

Change the fuel

Fuel system

Air in the injection pump

Bleed the air from the fuel

system

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle injection

starting pressure too low

Improper spray condition

Adjust or replace the injection

nozzle

Defective fuel injection nozzle
resulting in fuel drippage after

fuel injection

Replace the delivery valve

Injection pump plunger worn or

stuck

Replace the injection pump

plunger assembly

Continued on the next page

OK

OK

NG

NG

NG

NG

NG

NG

NG

Injection nozzle

Injection pump

OK

TROUBLESHOOTING 6 – 7

Checkpoint

Trouble

Cause

Countermeasure

Injection pump

Injection pump drive shaft

seizure or other damage

Replace the injection pump

drive shaft

Injection pump governor spring

seizure

Replace the injection pump

governor spring

NG

NG

Continued from the previous page

6 – 8 TROUBLESHOOTING

UNSTABLE IDLING

Checkpoint

Trouble

Cause

Countermeasure

Idling system

Idling improperly adjusted

Adjust the idling

Defective fast idling speed

control device

Repair or replace the fast idling

speed control device

Fast idling speed control device

Accelerator control system

improperly adjusted

Adjust the accelerator control

system

Accelerator control system

Fuel system leakage or

blockage

Repair or replace the fuel

system

Fuel system

Air in the fuel system

Bleed the air from the fuel

system

Water particles in the fuel

system

Change the fuel

Fuel filter

Clogged fuel filter element

Replace the fuel filter cartridge

the fuel filter cartridge

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG

Continued on the next page

TROUBLESHOOTING 6 – 9

Checkpoint

Trouble

Cause

Countermeasure

Fuel feed pump

Defective fuel feed pump

Replace the fuel feed pump

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle

Injection nozzle injection

starting pressure too low

Improper spray condition

Adjust or replace the injection

nozzle

Defective delivery valve

resulting in fuel drippage after

fuel injection

Replace the delivery valve

Injection pump

Injection timing improperly

adjusted

Adjust the injection timing

Insufficient injection volume

Adjust the injection volume

Defective idle spring

Replace the idle spring

OK

OK

NG

NG

NG

NG

NG

NG

NG

Continued on the next page

Continued from the previous page

OK