Suzuki Swift User Manual page 79

6-28 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
Condition
Excessive
hydrocarbon (HC)
emission or carbon
monoxide (CO)
Excessive nitrogen
oxides (NOx)
emission
Possible Cause
Ignition system out of order
D Faulty spark plug
D Leaky or disconnected high-tension cord
D Faulty ignition coil with ignitor
Low compression
Engine and emission control system out of
order
D Lead contamination of three way catalytic
converter
D Faulty evaporative emission control system
D Fuel pressure out of specification
D Closed loop system (A/F feed back
compensation) fails
– Faulty TP sensor
– Poor performance of ECT sensor or MAP
sensor
D Faulty injector
D Faulty fuel injector resistor
D Faulty ECM (PCM)
Others
D Engine not at normal operating temperature
D Clogged air cleaner
D Vacuum leaks
Ignition system out of order
D Improper ignition timing
Engine and emission control system out of
order
D Lead contamination of catalytic converter
D Fuel pressure out of specification
D Closed loop system (A/F feed back
compensation) fails
– Faulty TP sensor
– Poor performance of ECT sensor or MAP
sensor
D Faulty injector
D Faulty fuel injector resistor
D Faulty ECM (PCM)
Referring Item
Spark plugs in Section 6F
High-tension cords in Section 6F
Ignition coil assembly in Section
6F
Refer to "Low compression"
section
Check for absence of filler neck
restrictor
EVAP control system in Section
6E1
Diagnostic Flow Table B-3
TP sensor in Section 6E1
ECT sensor or MAP sensor in
Section 6E1
Diagnostic Flow Table B-1
Fuel injector resistor in Section 6E1
See section 6F1
Check for absence of filler neck
restrictor.
Diagnostic Flow Table B-3
TP sensor in Section 6E1
ECT sensor or MAP sensor in
Section 6E1
Diagnostic Flow Table B-1
Fuel injector resistor in Section 6E1