Suzuki Liana RH418 Supplementary Service Manual page 48

1A-35 Engine General Information and Diagnosis:
Condition
Excessive hydrocarbon
(HC) emission or carbon
monoxide (CO)
Excessive nitrogen
oxides (NOx) emission
Possible cause
Faulty spark plug
Leaky or disconnected high-tension cord "High-Tension Cord Inspection in Section 1H in
Faulty ignition coil with ignitor
Low compression
Lead contamination of three way
catalytic converter
Faulty evaporative emission control
system
Fuel pressure out of specification
Closed loop system (A/F feed back
compensation) fails (Faulty TP sensor,
Poor performance of ECT sensor or
MAP sensor)
Faulty injector(s)
Faulty ECM
Engine not at normal operating
temperature
Clogged air cleaner
Vacuum leaks
Improper ignition timing
Lead contamination of catalytic
converter
Fuel pressure out of specification
Closed loop system (A/F feed back
compensation) fails (Faulty TP sensor,
Poor performance of ECT sensor or
MAP sensor)
Faulty injector(s)
Faulty ECM
Camshaft position control system out of
order
Correction / Reference Item
"Spark Plug Inspection in Section 1H in related
manual"
related manual"
"Ignition Coil Assembly (Including Igniter)
Inspection in Section 1H in related manual"
"Compression Check in Section 1D"
Check for absence of filler neck restrictor.
"EVAP Canister Purge Inspection in Section
1B in related manual"
"Fuel Pressure Check"
"Throttle Position (TP) Sensor On-Vehicle
Inspection in Section 1C in related manual",
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C in related manual" or
"Manifold Absolute Pressure (MAP) Sensor
Inspection in Section 1C in related manual"
"Fuel Injector Inspection in Section 1G"
"Ignition Timing Inspection in Section 1H in
related manual"
Check for absence of filler neck restrictor.
"Fuel Pressure Check"
"Throttle Position (TP) Sensor On-Vehicle
Inspection in Section 1C in related manual",
"Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C in related manual" or
"Manifold Absolute Pressure (MAP) Sensor
Inspection in Section 1C in related manual"
"Fuel Injector Inspection in Section 1G"
"Oil Control Valve Inspection in Section 1C"