Service manual

FUEL INJECTION SYSTEM
8-36
EAS27362
SELF-DIAGNOSTIC FUNCTION TABLE
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illu-
minates the engine trouble warning light and provides the engine with alternate operating instruc-
tions that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that
are programmed for each sensor in order to provide the engine with alternate operating instructions
that enable the engine to continue to operate or stop operating, depending on the conditions.
Self-Diagnostic Function table
a. Main switch “OFF”
b. Main switch “ON”
c. Engine trouble warning light off
d. Engine trouble warning light on for 1.4 sec-
onds
Fault
code No.
Item Symptom
Able/
unable
to start
Able/
unable
to drive
11
Cylinder identifica-
tion sensor
No normal signals are received from the
cylinder identification sensor when the
engine is started or while the vehicle is
being driven.
Unable Able
12
Crankshaft position
sensor
No normal signals are received from the
crankshaft position sensor.
Unable Unable
13
Intake air pressure
sensor
(open or short circuit)
Intake air pressure sensor:
open or short circuit detected. Able Able
14
Intake air pressure
sensor hose line
(piping system)
Intake air pressure sensor:
faulty intake air pressure sensor system. Able Able
15
Throttle position sen-
sor
(open or short circuit)
Throttle position sensor:
open or short circuit detected. Able Able
16
Throttle position sen-
sor
(stuck)
Throttle position sensor is stuck.
Able Able
17
EXUP servo motor
potention circuit
(open or short circuit)
EXUP servo motor potension circuit:
open or short circuit detected. Able Able
18
EXUP servo motor
(stuck)
EXUP servo motor is stuck.
Able Able
19
Sidestand switch
(open circuit in the
wire to the ECU)
Open circuit in the input line of ECU No.24
terminal is detected when start switch is
pressed from the sidestand switch to the
ECU.
Unable Unable
20
Intake air pressure
sensor or atmo-
spheric pressure sen-
sor
When the main switch is turned to “ON”,
the atmospheric pressure sensor voltage
and intake air pressure sensor voltage dif-
fer greatly.
Able Able