MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-5
M U LTIPO R T FU EL IN JEC TIO N (M FI) D IA G N O SIS
TROUBLESHOOTING STRATEGY
M1131008500093
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure to have
exhausted most of the possible ways to find an MFI
fault.
1. Gather as much information as possible about the
complaint from the customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any MFI Diagnostic Trouble
Code (DTC).
4. If you cannot verify the condition and there are no
DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
−
How
to cope with Intermittent Malfunction
P.00-8
5. If you can verify the condition but there are no
DTCs, or the system cannot communicate with
the scan tool, refer to the trouble symptom
classification table.
6. If there is a DTC, record the number of the code,
then erase the code from the memory using the
scan tool.
NOTE: If a DTC is erased, its "freeze frame" data will
be also erased and the readiness test status will be
reset. If necessary, store the "freeze frame" data
before erasing the DTC.
7. Reconfirm the malfunction symptom and carry out
a test drive with the drive cycle pattern.
8. If DTC is set again, carry out an inspection with
the inspection procedure for diagnostic trouble
codes of that code.
9. If DTC is not set again, the malfunction is
intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
−
How to cope with Intermittent
Malfunction
P.00-8
10.After repairs are completed, conduct a road test
duplicating the complaint set conditions to confirm
the malfunction has been eliminated.
NOTE: If the powertrain control module (PCM) is
replaced, the immobilizer-ECU should be replaced
together with it. Each PCM has an individual
information for immobilizer-ECU, and the individual
information is registered in the immobilizer-ECU.
TROUBLE CODE DIAGNOSIS
M1131008600090
SERVICE ENGINE SOON/MALFUNCTION INDICATOR
LAMP
Among the on-board diagnostic items, a Service Engine Soon/
Malfunction Indicator Lamp illuminates to notify the driver of an
emission control malfunction.
However, when an irregular signal returns to normal and the
engine control module judges that it has returned to normal, the
Service Engine Soon/Malfunction Indicator Lamp is switched
off.
Moreover, when the ignition switch is turned off, the lamp is
switched off. Even if the ignition switch is turned on again, the
lamp does not illuminate until the malfunction is detected.
Immediately after the ignition switch is turned on, the Service
Engine Soon/Malfunction Indicator Lamp is lit for five seconds
to indicate that the Service Engine Soon/Malfunction Indicator
Lamp operates normally.
Items Indicated by the Service Engine Soon/Malfunction Indicator Lamp
AK000605AB
SERVICE ENGINE SOON/
MALFUNCTIONINDICATOR LAMP
DTC NO.
ITEMS
-
Powertrain control module (PCM) malfunction
P0101
Volume air flow circuit range/performance problem
P0102
Volume air flow circuit low input