Suzuki 2000 Grand Vitara SQ625 Service Manual page 129

6-1-18 ENGINE (H25 ENGINE)
5. TROUBLE SYMPTOM CONFIRMATION
Based on information obtained in Step 1 "CUSTOMER COMPLAINT ANALYSIS" and Step 2 "DTC/FREEZE
FRAME DATA CHECK", confirm trouble symptoms. Also, reconfirm DTC according to "DTC CONFORMATION
PROCEDURE" described in each "DTC FLOW TABLE".
6. and 7. RECHECKING AND RECORD OF DTC
Refer to "DTC Check" in this section for checking procedure.
8. ENGINE BASIC INSPECTION AND ENGINE DIAGNOSIS TABLE
Perform basic engine check according to the "ENGINE BASIC INSPECTION FLOW TABLE" first. When the end
of the flow table has been reached, check the parts of the system suspected as a possible cause referring to
"ENGINE DIAGNOSIS TABLE" and based on symptoms appearing on the vehicle (symptoms obtained through
steps of customer complaint analysis, trouble symptom confirmation and/or basic engine check) and repair or
replace faulty parts, if any.
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/IAC duty referring to
"Idle Speed/IAC Duty Inspection" in "ENGINE AND
EMISSION CONTROL" section.
Is check result as specified?
6 Check ignition timing referring to "Ignition Timing Inspec-
tion" in "IGNITION SYSTEM" section.
Is check result as specified?
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 3 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?
8 Check fuel pump for operating.
1) Was fuel pump operating sound heard from fuel filler
for about 3 seconds after ignition switch ON and stop?
9 Check ignition spark referring to "Ignition Spark Test"
in "IGNITION SYSTEM" section.
Is it in good condition?
10 Check fuel injector referring to "Fuel Injector Inspection"
in "ENGINE AND EMISSION CONTROL" section.
Is it in good condition?
ENGINE BASIC INSPECTION FLOW TABLE
ACTION YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Go to "ENGINE
DIAGNOSIS
TABLE"
in this section.
Go to Step 9.
Go to "Diag. Flow
Table B-3" in this
section.
Go to Step 10.
Go to "ENGINE
DIAGNOSIS
TABLE"
in this section.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Charge or replace
battery.
Go to "DIAGNOSIS"
in "CRANKING
SYSTEM" section.
Go to Step 7.
Go to "ENGINE
DIAGNOSIS
TABLE"
in this section.
Adjust ignition
timing.
Go to Step 8.
Go to "Diag. Flow
Table B-1" in this
section.
Go to "DIAGNOSIS"
in "IGNITION
SYSTEM section.
Go to "Diag. Flow
Table B-2 in this
section.