Suzuki 2006 SX4, Service Manual

Page: 98 / 1478

1A-54 Engine General Information and Diagnosis:
Excessive hydrocarbon
(HC) emission or carbon
monoxide (CO) Faulty spark plug “Spark Plug Inspection in Section 1H”
Faulty ignition coil with ignitor “Ignition Coil Assembly (Including ignitor)
Inspection in Section 1H”
Low compression “Compression Check in Section 1D”
Lead contamination of three way
catalytic converter Check for absence of filler neck restrictor.
Faulty evaporative emission control
system “EVAP Canister Purge Inspection in Section
1B”
Fuel pressure out of specification “Fuel Pressure Check”
Closed loop system (A/F feedback
compensation) fails (Faulty TP sensor,
Poor performance of ECT sensor or
MAF sensor) “Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”, “Engine Coolant
Temperature (ECT) Sensor Inspection in
Section 1C” or “Mass Air Flow (MAF) and
Intake Air Temperature (IAT) Sensor
Inspection in Section 1C”
Faulty electric throttle body assembly “Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly “Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C”
Faulty injector(s) “Fuel Injector Circuit Check”
Faulty ECM “Inspection of ECM and Its Circuits”
Engine not at normal operating
temperature —
Clogged air cleaner “Air Cleaner Filter Inspection and Cleaning in
Section 1D”
Vacuum leaks “Engine Vacuum Check in Section 1D”
Excessive nitrogen
oxides (NOx) emission Improper ignition timing “Ignition Timing Inspection in Section 1H”
Lead contamination of catalytic
converter Check for absence of filler neck restrictor.
Fuel pressure out of specification “Fuel Pressure Check”
Closed loop system (A/F feedback
compensation) fails (Faulty TP sensor,
Poor performance of ECT sensor or
MAF sensor) “Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”, “Engine Coolant
Temperature (ECT) Sensor Inspection in
Section 1C” or “Mass Air Flow (MAF) and
Intake Air Temperature (IAT) Sensor
Inspection in Section 1C”
Faulty electric throttle body assembly “Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly “Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C”
Faulty injector(s) “Fuel Injector Circuit Check”
Faulty ECM “Inspection of ECM and Its Circuits”
Condition Possible cause Correction / Reference Item