3.1.13-172
CS35 2013.04
3.1.13-172Electronic Control System - ME7
3. Diagnosis Procedures
CAUTION: If the Electronic Control System stores the other DTC rather than misfiring DTC ,
first carry out troubleshooting for these DTC.
CAUTION: If misfire does not occur when sending to the service, carry out road test again to
make the misfiring failure reappear. And use the diagnostic tool to record the ECM data when
the misfiring occurs to analyze cause of the malfunction.
CAUTION: If the vehicle still stores no DTC that related to misfiring after long road test, then
the failure may be caused by the following:
• Fuel tank is overfull, the fuel goes into the engine evaporative emissions Electronic Control
System , causing the mixture too thick and misfire.
• Misfire caused by bad combustion of improper fuel.
• Misfire caused by ignition failure that resulted in by spark plug fouling.
• Carry out basic inspection to the system according to the DTC.
• After completion of the repairs, road test the vehicle to confirm that DTC is not stored.
Test Conditions Details/Results/Actions
1. General inspection
A. Inspect the wiring harness connector for damage,
poor contact, aging, loosening or other signs.
B. Inspect the vacuum tubes for the phenomena of
damage, loose, or leakage.
C. Inspect air intake system for leakage.
Is it normal?
Y
Go to step 2.
N
Repair the fault part.
2. Inspect the DTC
A. Connect the diagnostic tool.
B. Start the engine, inspect engine system.
C. Inspect the DTC.
Is there any DTC besides P0300, P0301, P0302,
P0303 and P0304?
Y
Go to DTC diagnosis procedure.
Refer to: DTC Diagnostic Procedure Index
(3.1.13 Electrical Control System - ME7,
DTC Diagnosis and Testing).
N
Go to step 3.
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