YH4
GRAND
VITARA
ENGINE DIAGNOSIS (G16 / J20 ENGINES)
6-29
ENGINE DIAGNOSIS TABLE
Perform troubleshooting referring to following table when ECM (PCM) has detected no DTC and no abnormality
has been found in visual inspection and engine basic inspection previously.
Condition
Possible Cause
Reference Item
Hard starting
(Engine cranks OK)
Engine and emission control system
out of order.
Faulty idle air control system
Faulty ECT sensor or MAF sensor
Faulty ECM (PCM)
Low compression.
Faulty hydraulic valve lash adjuster
Compression leak from valve seat
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head
gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Others
Malfunctioning PCV valve
DTC P0505 Diag. Flow Table or Table
B-4 in this Section.
ECT sensor or MAF sensor in Engine
and Emission Control System
Section.
Inspection of ECM (PCM) and its
circuit in this Section.
Compression check in Engine
Mechanical Section.
Valve lash adjuster in Engine
Mechanical Section.
Valves inspection in Engine
Mechanical Section.
Valves inspection in Engine
Mechanical Section.
Valves spring inspection in Engine
Mechanical Section.
Cylinder head inspection in Engine
Mechanical Section.
Piston ring inspection in Engine
Mechanical Section.
Cylinders, pistons and piston rings
inspection in Engine Mechanical
Section.
PCV system inspection in Engine and
Emission Control System Section.
Engine has no power
Engine overheating.
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 regulator
– 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
Refer to “Overheating” Section.
Spark plugs in Ignition System
Section.
Ignition coil in Ignition System
Section.
Diag. Flow Table B-3 in this Section.
TP sensor in Engine and Emission
Control System Section.
DTC P0400 Diag. Flow Table in this
Section.
Fuel injector in Engine and Emission
Control System Section.
TP sensor, ECT sensor or MAF
sensor in Engine and Emission
Control System Section.
Inspection of ECM (PCM) and its
circuit in this Section.
Previously outlined.
Diagnosis in BRAKES Section.
Diagnosis in Clutch Section.
Содержание 2000 Grand Vitara SQ416
Страница 75: ...ENGINE DIAGNOSIS G16 J20 ENGINES 6 71 Fig 1 for Step 3...
Страница 179: ...6 1 68 ENGINE H25 ENGINE a Fig for STEP 2 3 a HO2S heater relay...
Страница 190: ...ENGINE H25 ENGINE 6 1 79 a Fig for STEP 2 3 a HO2S heater relay...
Страница 205: ...6 1 94 ENGINE H25 ENGINE Fig for STEP 4 1 Disconnected CMP sensor coupler 2 BI B wire terminal 3 Gr Y wire terminal...
Страница 541: ...6E1 4 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES G16 ENGINE...
Страница 542: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 5...
Страница 543: ...6E1 6 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES J20 ENGINE...
Страница 544: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 7...
Страница 549: ...Or W Bl G Bl Y C51 1 22 C51 1 23 C51 1 10 C51 1 11 6E1 12 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES...
Страница 552: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 15...
Страница 592: ...6E2 4 ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE...
Страница 593: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 5...
Страница 597: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 9...
Страница 661: ...IGNITION SYSTEM FOR J20 H25 ENGINES 6F2 13 INSTALLATION For installation reverse removal procedure...
Страница 723: ...6H 30 CHARGING SYSTEM 17 Make sure that rotor turns smoothly...
Страница 729: ...Prepared by Overseas Service Department 1st Ed April 2000 Printed in Japan Printing April 2000 736...