Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 41

6-36 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)
Condition
Engine has no power Engine overheating.
Possible Cause
Ignition system out of order.
• Defective spark plug.
• Faulty ignition coil with ignitor
Fuel system out of order.
• Fuel pressure out of specification
– Dirty fuel filter
– Dirty or clogged fuel hose or pipe
– Malfunctioning fuel pressure regu-
lator
– Malfunctioning fuel pump
Engine and emission control system
out of order.
• Maladjusted TP sensor installation
angle
• Faulty EGR system
• Faulty injector
• Faulty TP sensor, ECT sensor or
MAF sensor
• Faulty ECM (PCM)
Low compression.
Others
• Dragging brakes
• Slipping clutch
Correction
Refer to "Overheating" in this table.
"Spark Plugs" in Section 6F1 or 6F2.
"Ignition Coil Assembly" in Section 6F1 or
6F2.
"Diag. Flow Table B-3" in this section.
"TP sensor" in Section 6E1.
"DTC P0400 Diag. Flow Table" in this sec-
tion.
"Fuel Injector" in Section 6E1.
"TP Sensor", "ECT Sensor" or "MAF Sensor"
in Section 6E1.
"Inspection of ECM (PCM) and Its Circuit" in
this section.
Previously outlined.
"Diagnosis Table" in Section 5.
"Diagnosis Table" in Section 7C.