FUEL INJECTION SYSTEM
7-28
EAS27380
SELF-DIAGNOSTIC FUNCTION TABLE
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illumi-
nates the engine trouble warning light and provides the engine with alternate operating instructions 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
b
c
c
d
a. Main switch “OFF”
b. Main switch “ON”
c. Engine trouble warning light off
d. Engine trouble warning light on for 1.4
seconds
Fault
code No.
Item Symptom
Able / un-
able to start
Able / un-
able to
drive
12
Crankshaft position
sensor
No normal signals are received
from the crankshaft position
sensor.
Unable Unable
13
Cylinder-#1 intake air
pressure sensor
(open or short circuit)
Cylinder-#1 intake air pressure
sensor: open or short circuit
detected.
Able Able
14
Cylinder-#1 intake air
pressure sensor
(hose line)
Cylinder-#1 intake air pressure
sensor: hose system malfunction
(clogged or detached hose).
Able Able
15
Throttle position
sensor
(open or short circuit)
Throttle position sensor: open or
short circuit detected.
Able Able
17
EXUP servo motor
circuit
(open or short circuit)
EXUP servo motor circuit: open or
short circuit detected.
Able Able
18
EXUP servo motor
(lock)
EXUP servo motor is stuck. Able Able
19
Blue/yellow ECU lead
(broken or
disconnected)
A break or disconnection of the
blue/yellow lead of the ECU is
detected.
Unable Unable
22
Air temperature
sensor
(open or short circuit)
Air temperature sensor: open or
short circuit detected.
Able Able
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