FUEL INJECTION SYSTEM
8-36
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 sen-
sor.
Unable Unable
13
Front cylinder intake
air pressure sensor
(open or short circuit)
Front cylinder intake air pressure
sensor: open or short circuit de-
tected.
Able Able
14
Front cylinder intake
air pressure sensor
(hose system)
Front cylinder intake air pressure
sensor: hose system malfunction
(clogged or detached hose).
Able Able
15
Throttle position sen-
sor
(open or short circuit)
Throttle position sensor: open or
short circuit detected.
Able Able
19
Blue/black ECU lead
(broken or discon-
nected)
A break or disconnection of the
blue/black lead of the ECU is de-
tected.
Unable Unable
21
Coolant temperature
sensor
Coolant temperature sensor: open
or short circuit detected.
Able Able
22
Air temperature sen-
sor
(open or short circuit)
Air temperature sensor: open or
short circuit detected.
Able Able
24
O
2
sensor
No normal signal is received from
the O
2
sensor.
Able Able
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