Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 534

6 – 10 TROUBLESHOOTING

Checkpoint

Trouble

Cause

Countermeasure

Injection pump

Defective governor lever

operation

Repair or replace the governor

lever

Regulator valve improperly

adjusted

Adjust or replace the regulator

valve

Broken plunger spring

Replace the plunger spring

Worn plunger

Replace the plunger assembly

Worn cam disc

Replace the cam disc

Valve clearance improperly

adjusted

Adjust the valve clearance

Blown out cylinder head gasket

Worn cylinder liner

Piston ring sticking or broken

Improper seating between the

valve and the valve seat

Replace the related parts

OK

OK

NG

NG

NG

NG

NG

NG

NG

Continued from the previous page

Valve clearance

Compression pressure

TROUBLESHOOTING 6 – 11

1503

INSUFFICIENT POWER

Checkpoint

Trouble

Cause

Countermeasure

Air cleaner

Clogged air cleaner element

Clean or replace the air cleaner

element

Water particles in the fuel

Replace the fuel

Fuel

Clogged fuel filter element

Replace the fuel filter element

or the fuel filter cartridge

Fuel filter

Defective fuel feed pump

Repair or replace the fuel feed

pump

Fuel feed pump

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle injection

starting pressure too low

Improper spray condition

Adjust or replace the injection

nozzle

Fuel injection pipes

Fuel injection pipes damaged or

obstructed

Replace the fuel injection pipes

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG

Continued on the next page

Injection nozzle

OK

6 – 12 TROUBLESHOOTING

Checkpoint

Trouble

Cause

Countermeasure

Injection pump

Defective regulating valve

Repair or replace the regulating

valve

Defective delivery valve

Replace the delivery valve

Defective timer

Repair or replace the timer

Worn cam disk

Replace the cam disk

Improper control lever operation

Adjust or replace the control

lever

Defective injection timing

Adjust the injection timing

Repair or replace the injection

pump timer

Weak governor spring

Replace the governor spring

NG

NG

NG

NG

NG

NG

NG

Continued on the next page

Continued from the previous page

OK

TROUBLESHOOTING 6 – 13

Checkpoint

Trouble

Cause

Countermeasure

Injection pump

Worn plunger

Replace the plunger assembly

Worn cam disc

Replace the cam disc

Booster compensator pipe

broken or cracked

Replace the booster

compensator pipe

Exhaust gas leakage from the

exhaust system

Air leakage from the intake

system

Repair or replace the related

parts

Defective waste gate

Repair or replace the waste

gate

Defective turbocharger

assembly

Replace the turbocharger

assembly

Blown out cylinder head gasket

Worn cylinder liner

Piston ring sticking or broken

Improper seating between the

valve and the valve seat

Replace the related parts

NG

NG

NG

NG

NG

NG

NG

Continued on the next page

Continued from the previous page

Turbocharger

OK

Compression pressure

OK