Isuzu 22LE User Manual

6-2 ENGINE DIAGNOSIS (C22NE, 22LE, 20LE)
Engine Diagnosis
Hard Starting
1.Starting Motor Does Not Turn Over
Trouble Shooting Procedure
Turn on headlights and starter switch.
Condition Possible cause Correction
Headlights go out or dim
considerably
Battery run down or under
charged
Recharge or replace battery
Terminals poorly connected Clean battery posts and terminals
and connect properly
Starting motor coil circuit shorted Overhaul or replace
Starting motor defective Overhaul or replace
2.Ignition Trouble - Starting Motor Turns Over But Engine Does Not Start
Spark Test
Disconnect a high tension cable from any spark plug.
Connect the spark plug tester (use commercially
available tool), crank the engine, and check if a spark is
generated in the spark plug tester. Before cranking the
engine, make sure that the spark plug tester is properly
grounded. To avoid electrical shock, do not touch the
high tension cable while the engine is running.
Condition Possible cause Correction
Spark jumps across gap Spark plug defective Clean, adjust spark gap or replace
Ignition timing incorrect Refer to Ignition System
Fuel not reaching fuel injector(s)
or engine
Refer to item 3 (Trouble in fuel
system)
Valve timing incorrect Adjust
Engine lacks compression Refer to item 4 (Engine lacks
compression)
No sparking takes place Ignition coil disconnected or
broken
Connect properly or replace
Electronic Ignition System with
module
Replace
Poor connections in engine
harness
Correct
Engine Control Module cable
disconnected or defective
Correct or replace

Isuzu 22LE Specifications

General

Brand	Isuzu
Model	22LE
Category	Engine
Language	English