6-34 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)
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 Action Yes No
1Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Ta bl e ”.
2 Check battery voltage.
Is it 11 V or more?
Go to Step 3. Charge or replace battery.
3 Is engine cranked? Go to Step 4. Go to “Diagnosis Table” in
Section 6G or 6G1.
4 Does engine start? Go to Step 5. Go to Step 7.
5 Check engine idle speed/IAC duty referring to
“Idle speed/IAC Duty Inspection” in Section
6E1.
Is check result as specified?
Go to Step 6. Go to “Engine Diagnosis
Ta bl e ” in this section.
6 Check ignition timing referring to “Ignition Tim-
ing Inspection” in Section 6F1 or 6F2.
Is check result as specified?
Go to “Engine Diagnosis
Ta bl e ” in this section.
Adjust ignition timing or
check input signals
related to ignition system.
7 Is immobilizer control system equipped? Go to Step 8. Go to Step 9.
8 Check immobilizer system malfunction as fol-
lows.
1) Check immobilizer indicator lamp or MIL
(malfunction indicator lamp) for flashing.
Is it flashing when ignition switch is turned to
ON position?
Go to “Diagnostic Flow
Ta bl e ” 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.
Is fuel return pressure (returning sounds) felt
from fuel return hose when ignition 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 “Diag. Flow Table B-
3”.
Go to “Diag. Flow Table B-
1”.
11 Check ignition spark referring to “Ignition Spark
Tes t” in Section 6F1 or 6F2.
Is it in good condition?
Go to Step 12. Go to “Diagnosis Table” in
Section 6F1 or 6F2.
12 Check fuel injector referring to “Fuel Injector” in
Section 6E1.
Is it in good condition?
Go to “Engine Diagnosis
Ta bl e ” in this section.
Go to “Diag. Flow Table B-
2”.
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