Engine Basic Check - Suzuki Grand Vitara XL-7 Service Manual

ENGINE BASIC CHECK

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 engine idle speed referring to "Idle speed
Inspection" in Section 6E3.
Is check result as specified?
6 Is immobilizer control system equipped?
7 Check immobilizer system malfunction as follows.
1) Execute Data List mode of Suzuki mode using ECM
application of Suzuki scan tool.
Dose Suzuki scan tool indicate communication error
message?
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 5 seconds and then OFF.
Repeat this a few times.
Is fuel return pressure (returning sounds) felt from fuel
return hose when ignition switch is turned ON?
9 Check fuel pump for operating.
1) Was fuel pump operating sound heard from fuel pump
for about 5 seconds after ignition switch ON and stop?
10 Check fuel injector referring to "Fuel Injector Inspection"
in Section 6E3.
Is it in good condition?
ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM) 6-19
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 or
6G1.
Go to Step 5. Go to Step 6.
Go to Step 11 in Go to "Engine
"ENGINE DIAG. Diagnosis Table" in
FLOW TABLE". this section.
D Go to step 7 if
Go to Step 8.
Suzuki scan tool is
available.
D Go to
"DIAGNOSIS" in
Section 8G if
Suzuki scan tool is
not available.
Go to "DIAGNOSIS" Go to Step 8.
in Section 8G.
Go to Step 10. Go to Step 9.
Go to "LOW Go to "Diag. Flow
PRESSURE Table B-1".
FUEL SUPPLY
INSPECTION" in
Section 6E3.
Go to "Engine Go to "DTC
Diagnosis Table" in P0201/0202/0203/
this section. 0204 Flow Table".
NO