Suzuki Wagon R Plus RB310, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-25
Overheating Inoperative thermostat “Thermostat Inspection” in Section 6B2.
Poor water pump performance “Water Pump Inspection” in Section
6B2.
Clogged or leaky radiator “Radiator Inspection” in Section 6B2.
Improper engine oil grade “Engine Oil and Oil Filter Replacement”
in Section 0B.
Clogged oil filter or oil strainer “Oil Pressure Check” in Section 6A2.
Poor oil pump performance “Oil Pressure Check” in Section 6A2.
Faulty radiator fan control system “Table B-7 Radiator Fan Control Sys-
tem Check” in this section.
Dragging brakes “Diagnosis Table” in Section 5.
Slipping clutch “Diagnosis Table” in Section 7C.
Blown cylinder head gasket “Valves and Cylinder Head Inspection”
in Section 6A2.
Poor gasoline mile-
age Leaks or loose connection of high-tension
cord “High-tension Cords Inspection” in Sec-
tion 6F2.
Faulty spark plug (improper gap, heavy
deposits and burned electrodes, etc.) “Spark Plugs Inspection” in Section
6F2.
Malfunctioning EGR valve “EGR Valve Inspection” Section 6E2.
High idle speed “Improper Engine Idling or Engine Fails
to Idle” in this table.
Poor performance of TP sensor, ECT sensor
or MAF sensor “TP Sensor On-Vehicle Inspection”,
“ECT Sensor Inspection” or “Mass Air
Flow (MAF) and Intake Air Temperature
(IAT) Sensor Inspection” in Section
6E2.
Faulty fuel injector(s) “Table B-1 Fuel Injector Circuit Check”
in this section.
Faulty ECM
Low Compression
“Low Compression” in this table.
Poor valve seating “Valves and Cylinder Head Inspection”
in Section 6A2.
Dragging brakes “Diagnosis Table” in Section 5.
Slipping clutch “Diagnosis Table” in Section 7C.
Thermostat out of order “Thermostat Inspection” in Section 6B2.
Improper tire pressure “Replacement Tires” in Section 3F.
VVT system out of order “Oil Control Valve Inspection” in Section
6E2.
Condition Possible Cause Reference Item