Suzuki 2000 Grand Vitara SQ625 Service Manual page 200

DTC TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Ignition System inspection:
(1) Check spark plug and ignition spark of cylinder
where misfire occurs, referring to "IGNITION
SYSTEM" section.
Is it in good condition?
3 Fuel Injector Circuit check:
(1) Check fuel injector circuit referring to "TABLE B-2"
in this section.
Is it in good condition?
4 Fuel Injector Operation check:
(1) Using sound scope, check each injector operating
sound at engine cranking or idling.
Do all injectors make operating sound?
5 Fuel Pressure inspection:
(1) Check fuel pressure referring to "TABLE B-3" in this
section.
Is check result satisfactory?
6 Fuel Injector inspection:
(1) Check fuel injector(s) referring to "ENGINE AND
EMISSION CONTROL SYSTEM" section.
Is check result satisfactory?
7 Ignition Timing inspection:
(1) Check ignition timing referring to "IGNITION
SYSTEM" section.
Is check result satisfactory?
8 EGR System inspection:
(1) Check EGR system referring to "ENGINE AND
EMISSION CONTROL SYSTEM" section.
Is check result satisfactory?
9 Fuel Level Sensor inspection:
(1) Check fuel level sensor referring to "ENGINE AND
EMISSION CONTROL SYSTEM" section.
Is check result satisfactory?
10 Engine Mechanical Systems check:
(1) Check engine mechanical systems referring to
"ENGINE MECHANICAL" section.
Is check result satisfactory?
ACTION
ENGINE (H25 ENGINE) 6-1-89
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Go to Step 7.
Go to Step 8.
Go to Step 9.
Go to Step 10.
Substitute a known-
good ECM (PCM)
and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Faulty ignition coil,
wire harness or spark
plug.
If OK, substitute a
known-good ECM
(PCM) and recheck.
Repair or replace.
Check injector not
making operating
sound.
If OK, substitute a
known-good ECM
(PCM) and recheck.
Repair or replace.
Replace.
Adjust.
Repair or replace.
Repair or replace.
Repair or replace.