Suzuki Wagon R Plus RB310, Service Manual

Page: 196 / 846

ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-21
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 Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control Sys-
tem Check” in this
section.
2 Check battery voltage.
Is it 11 V or more? Go to Step 3. Charge or replace bat-
tery.
3 Is engine cranked? Go to Step 4. Go to “Cranking Sys-
tem Symptom Diagno-
sis” in Section 6G.
4 Does engine start? Go to Step 5. Go to Step 7.
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 650 – 750 r/min?
Go to Step 6. Go to “Engine Symp-
tom Diagnosis” in this
section.
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) Using timing light (1), check initial ignition timing.
See Fig. 3.
Is it 5° ± 3° BTDC at specified idle speed?
Go to “Engine Symp-
tom Diagnosis” in this
section. Check ignition control
related parts referring
to “Ignition Timing
Inspection in Section
6F2.
7 Is immobilizer control system equipped? Go to Step 8. Go to Step 9.
8 Check immobilizer system malfunction as follows.
1) Check immobilizer indicator lamp for flashing.
Is it flashing when ignition switch is turned to ON posi-
tion?
Go to “DTC Check” in
Section 8G. Go to Step 9.
9 Check fuel supply as follows:
1) Check to make sure that enough fuel is filled in fuel
tank.
2) Turn ON ignition switch for 3 seconds and then
OFF. Repeat this a few times. See Fig. 4.
Is fuel pressure felt from fuel feed hose (4) when igni-
tion switch is turned ON?
Go to Step 11. Go to Step 10.
10 Check fuel pump for operating.
Was fuel pump operating sound heard from fuel filler
for about 3 seconds after ignition switch ON and stop? Go to “Table B-3 Fuel
Pressure Check” in
this section. Go to “Table B-2 Fuel
Pump and Its Circuit
Check” in this section.