Suzuki Swift User Manual page 176

6-1-20 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
ENGINE BASIC INSPECTION
This check is very important for troubleshooting when ECM (PCM) has detected no DTC and no abnormality has
been found in visual inspection.
Follow the flow table carefully.
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check battery voltage.
Is it 11 V or more?
3 Is engine cranked?
4 Does engine start?
5 Check idle speed as follows:
1) Warm up engine to normal operating temp.
2) Shift transmission to neutral position for M/T
("P" position for A/T).
3) All of electrical loads are switched off.
4) Check engine idle speed with scan tool.
See Fig. 1.
Is it 700 – 800 r/min?
6 Check ignition timing as follows:
1) Using SUZUKI scan tool, select "MISC" mode on
SUZUKI scan tool and fix ignition timing to initial
one. See Fig. 2.
2) Remove air cleaner bolt and shift air cleaner
position to observe ignition timing.
3) Using timing light (1), check initial ignition timing.
See Fig. 3.
Is it 5_ ± 3_ BTDC at specified idle speed?
7 Check fuel supply as follows:
1) Check to make sure that enough fuel is filled in fuel
tank.
2) Turn ON ignition switch for 2 seconds and then
OFF. See Fig. 4.
Is fuel return pressure (returning sounds) felt from fuel
feed hose (1) when ignition switch is turned ON?
8 Check fuel pump for operating.
1) Was fuel pump operating sound heard from fuel
filler for about 2 seconds after ignition switch ON
and stop?
9 Check ignition spark as follows:
1) Disconnect injector couplers.
2) Remove spark plugs and connect them to high
tension cords.
3) Ground spark plugs.
4) Crank engine and check if each spark plug sparks.
Is it in good condition?
10 Check fuel injector for operation as follows:
1) Install spark plugs and connect injector
connectors.
2) Using sound scope (1), check operating sound of
each injector (2) when cranking engine. See Fig. 5.
Was injector operating sound heard from all
injectors?
ACTION YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
"ENGINE DIAGNO-
SIS TABLE" in this
section.
Go to Step 9.
Go to "DIAG. FLOW
TABLE B-3".
Go to Step 10.
"ENGINE DIAGNO-
SIS TABLE" in this
section.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Charge or replace
battery.
Go to "DIAGNOSIS"
in Section 6G.
Go to Step 7.
"ENGINE DIAGNO-
SIS TABLE" in this
section.
Check ignition control
related parts referring
to Section 6F1.
Go to Step 8.
Go to "DIAG. FLOW
TABLE B-2".
Go to "DIAGNOSIS"
in Section 6F1.
Go to "DIAG. FLOW
TABLE B-1".