3-40 FUEL SYSTEM (DFI)
Self-Diagnosis
Service Code Reading
○
Service codes are shown by a series of long and short blinks of the FI indicator light (LED) as shown
below.
○
Read 10th digit and unit digit as the FI indicator light (LED) blinks.
○
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 is repeated until the self-diagnosis terminal is open.
○
If there is no problem, no code and unlight.
○
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)
If the problem is with the following parts, the ECU cannot memorize these problems, the FI indicator
light (LED) doesn't go on, and no service codes can be displayed.
FI Indicator Light (LED)
Fuel Pump
Fuel Pump Relay
ECU Main Relay
ECU Power Source Wiring and Ground Wiring (see ECU Power Supply Inspection in this chapter)
Fuel Injectors
○
For example, if two problems of 12 and 21 occur, the service code 12 and 21 are shown as follows.
Service Code Erasing
○
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.
•
Refer to the Service Code Clearing Procedure for the service code erasure.
Service Code Table
Service
FI Indicator Light (LED)
Codes
11
12
13
14
15
21
Problems
Main throttle sensor malfunction, wiring open or
short
Inlet air pressure sensor malfunction, wiring open
or short
Inlet air temperature sensor malfunction, wiring
open or short
Water temperature sensor malfunction, wiring open
or short
Atmospheric pressure sensor malfunction, wiring
open or short
Crankshaft sensor malfunction, wiring open or short
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