Suzuki Baleno Manual page 1412

6-2-64 ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC)
TROUBLESHOOTING (DTC P0300/P0301/P0302/P0303/P0304)
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 section 6F2.
Is it in good condition?
3 Fuel Injector Circuit Check
1) Using sound scope, check each injector operating
sound at engine cranking or idling.
Do all injectors make operating sound?
4 Fuel Pressure Inspection
1) Check fuel pressure referring to "TABLE B-3" in this
section.
Is check result satisfactory?
5 Fuel Injector Inspection
1) Check fuel injector(s) referring to "Fuel injector
Inspection" in section 6E4.
Is check result satisfactory?
6 Ignition Timing Inspection
1) Check ignition timing referring to section 6F2.
Is check result satisfactory?
7 EGR System Inspection
1) Check EGR system referring to "EGR System
Inspection" in section 6E4.
Is check result satisfactory?
8 Fuel Level Sensor Inspection
1) Check fuel level sensor referring to Step 2 of DTC
P0460 Diag. Flow Table.
Is check result satisfactory?
9 Engine Mechanical Systems Check
Check engine mechanical parts or system which can
cause engine rough idle or poor performance.
– Engine compression (See "Engine Compression
Check" in section 6A3).
– Valve lash adjustor (See "Valve Lash Adjustor" in
section 6A3).
– Valve timing (See "Timing Chain Installation" in section
6A3).
Are they in good condition?
ACTION YES
Go to Step 2. Go to ENGINE
DIAG. FLOW
TABLE.
Go to Step 3. Faulty ignition coil,
wire harness, spark
plug or other system
parts.
Go to Step 4. Check coupler
connection and wire
harness of injector
not making
operating sound
and injector itself.
If OK, substitute a
known-good ECM
and recheck.
Go to Step 5. Repair or replace.
Go to Step 6. Replace.
Go to Step 7. Adjust.
Go to Step 8. Repair or replace.
Go to Step 9. Repair or replace.
Check wire harness Repair or replace.
and connection of
ECM ground,
ignition system and
fuel injector for
intermittent open
and short.
NO