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3-36 FUEL SYSTEM (DFI)
Self-Diagnosis
HowtoReadServiceCodes
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Service codes are shown by a series of long and short blinks of the FI indicator LED light as shown
below.
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Read 10th digit and unit digit as the FI indicator LED light blinks.
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When there are a number of problems, all the service codes can be stored and the display will
begin starting from the lowest number service code in the numerical order. Then after completing
all codes, the display i s repeated until the self-diagnosis indicator terminal is open.
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If there is no problem, no c ode and unlight.
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For example, if two problems occurred in the order of 21, 12, the service codes are displayed from
the lowest number in the order listed.
(12 → 21) → (12 → 21) → · · · (repeated)
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If the problem is with the following parts, the ECU cannot mem orize these problems, the FI indicator
LED light doesn’t go on, and no service codes can be displayed.
FI Indicator LED Light
Fuel Pump
Fuel Pump Relay
DFI Main Relay
ECU Power Source Wiring and Ground Wiring (see ECU Inspection in this chapter)
Fuel Injectors
How to Erase Service Codes
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Even if the ignition switch is turned OFF, the battery or the ECU are disconnected or the problem is
solved, all service codes remain in the ECU.
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Refer to the S ervice Code Clearing Procedure for the service code erasure.