Suzuki GA413 Service Manual page 798

6-22 ENGINE GENERAL INFORMATION AND DIAGNOSIS
ENGINE BASIC INSPECTION
This check is very important for troubleshooting when ECM 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.
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) When not using SUZUKI scan tool, disconnect scan
tool from DLC and connect test switch terminal of moni-
tor coupler to ground. See Fig. 2.
When using SUZUKI scan tool, select "MISC" mode on
SUZUKI scan tool and fix ignition timing to initial one.
See Fig. 3.
2) Open the engine service hole cover behind the front
seats and remove the inspection hole cap on the trans-
mission case to observe ignition timing.
3) Using timing light (1), check initial ignition timing.
See Fig. 4.
Is it 5_ + 3_ BTDC at specified idle speed?
7 Check immobilizer system malfunction as follows (if
equipped):
1) Check MIL (malfunction indicator lamp) for flashing.
Is it flashing when ignition switch is turned to ON position?
8 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. 5.
Is fuel return pressure (returning sounds) felt from fuel feed
hose (1) when ignition switch is turned ON?
9 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?
ACTION YES
Go to Step 2. Go to "ENGINE
DIAG. FLOW
TABLE".
Go to Step 3. Charge or replace
battery.
Go to Step 4. Go to "DIAGNOSIS"
in Section 6G.
Go to Step 5. Go to Step 7.
Go to Step 6. Go to "ENGINE
DIAGNOSIS TABLE".
Go to "ENGINE Check ignition control
DIAGNOSIS related parts referring
TABLE". to Section 6F.
Go to "DIAGNOSIS" Go to Step 8.
in Section 8G.
Go to Step 10. Go to Step 9.
Go to "DIAG. FLOW Go to "DIAG. FLOW
TABLE B-3". TABLE B-2".
NO