Suzuki 2006 SX4, Service Manual

Page: 130 / 1478

1A-86 Engine General Information and Diagnosis:
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Does fuel level meter indicate “E” level (empty)? Add fuel and recheck. Go to Step 3.
3 Air intake system and exhaust system inspection
1) Check air intake system and exhaust system for
leakage.
Are intake system and exhaust system in good condition?
Go to Step 4. Repair or replace.
4 Ignition system inspection
1) Check spark plug and ignition spark of cylinder where
misfire occurs, referring to “Spark Plug Inspection in
Section 1H” and “Ignition Spark Test in Section 1H”.
Is it in good condition?
Go to Step 5. Faulty ignition coil, wire
harness or spark plug. If
OK, substitute a known
good ECM and recheck.
5 Fuel injector and its circuit check
1) Check fuel injector circuit referring to “Fuel Injector
Circuit Check”.
Is it in good condition?
Go to Step 6. Repair or replace.
6 Fuel pressure inspection
1) Check fuel pressure referring to “Fuel Pressure Check”.
Is check result satisfactory?
Go to Step 7. Repair or replace.
7 Fuel injector inspection
1) Check fuel injector(s) referring to “Fuel Injector
Inspection in Section 1G”.
Is check result satisfactory?
Go to Step 8. Replace.
8 Ignition timing check
1) Check ignition timing referring to “Ignition Timing
Inspection in Section 1H”.
Is check result satisfactory?
Go to Step 9. Check related sensors.
9 Fuel level sensor inspection
1) Check fuel level sensor referring to “Fuel Level Sensor
Inspection in Section 9C”.
Is check result satisfactory?
Go to Step 10. Repair or replace.
10 Engine mechanical systems check
1) Check engine mechanical parts or system which can
cause engine rough idle or poor performance.
• Engine compression: Refer to “Compression Check in
Section 1D”.
• Valve lash: Refer to “Valve Lash (Clearance)
Inspection in Section 1D”.
• Valve timing: Refer to “2nd Timing Chain and Chain
Tensioner Removal and Installation in Section 1D”
and “1st Timing Chain and Chain Tensioner Removal
and Installation in Section 1D”.
Are they in good condition?
Check wire harness and
connection of ECM
ground, ignition system
and fuel injector for
intermittent open and
short. Repair or replace.