Suzuki GA413 Service Manual page 805

Condition
Excessive hydrocar-
bon (HC) emission or
Excessive carbon
monoxide (CO) emis-
sion
Excessive nitrogen ox-
ides (NOx) emission
Possible Cause
Ignition system out of order
D Faulty ignition coil or high-tension cord
Engine and Emission control system
out of order.
D Fuel pressure out of specification
D Lead contamination of three way cata-
lytic converter (if equipped)
D Malfunctioning PCV system
D Faulty EVAP control system
D Closed loop system (A/F feed back
compensation) fails (vehicle with
HO2S)
– Faulty TP sensor
– Faulty ECT sensor or MAP sensor
– Faulty oxygen sensor
D Faulty injector
D Faulty ECM
Low compression
Engine and emission control system
out of order
D Fuel pressure out of specification
D Lead contamination of three way cata-
lytic converter (if equipped)
D Closed loop system (A/F feed back
compensation) fails
– Faulty TP sensor
– Faulty ECT sensor or MAP sensor
– Faulty oxygen sensor
D Faulty injector
D Faulty ECM
D Faulty EGR system (if equipped)
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-29
Referring Item
Diagnosis in Section 6F.
Diagnostic Flow Table B-3
Maintenance in Section 6K.
PCV hose and PCV valve in Section 6E.
EVAP control system check in Section 6E.
Check oxygen sensor output voltage.
Refer to DTC P0130 Table in this section.
Diagnostic Flow Table B-1
Inspection of ECM and its circuit in Sec-
tion 6E.
Previously outlined.
Diagnostic Flow Table B-3
Maintenance in Section 6K.
Check oxygen sensor output voltage
Refer to DTC P0130 Table in this section.
Diagnostic Flow Table B-1
Inspection of ECM and its circuit in Sec-
tion 6E.
EGR system in Section 6E.