7 - 4
FI
FUEL INJECTION SYSTEM
EAS00901
Checking for a defective engine trouble warning light bulb
The engine trouble warning light comes on for 1.4 seconds after the main switch has been turned
“
ON
”
and when the start switch is being pushed. If the warning light does not come on under these
conditions, the warning light bulb may be defective.
EAS00902
ALTERNATE INSTRUCTIONS OPERATION CONTROL (FAIL-SAFE ACTION)
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.
The ECU takes fail-safe actions in two ways: one in which the sensor output is set to a prescribed
value, and the other in which the ECU directly operates an actuator. Details on the fail-safe actions
are given in the table below.
FAIL-SAFE ACTIONS TABLE
Fault
code No.
Item
Symptom
Fail-safe action
Engine start-
ability
Vehicle drive-
ability
12
Crankshaft position
sensor
No normal signals are
received from the crankshaft
position sensor.
•
Stops the engine (by stop-
ping the injection and igni-
tion).
Unable
Unable
13
14
Intake air pressure
sensor (open or short
circuit) (pipe system)
Intake air pressure sensor-
open or short circuit detected.
Faulty intake air pressure sen-
sor pipe system.
•
Fixes the intake air pres-
sure to 101.3 kPa
(1.01 kgf/cm
2
, 14.4 psi).
Able
Able
15
16
Throttle position sensor
(open or short circuit)
(stuck)
Throttle position sensor-open
or short circuit detected.
A stuck throttle position sensor
is detected.
•
Fixes the throttle position
sensor to middle open.
Able
Able
19
Broken or discon-
nected blue/yellow lead
of the ECU
Open circuit in the input line
(blue/yellow lead) of the ECU
is detected.
-- (No start)
Unable
Unable
21
Coolant temperature
sensor
Coolant temperature sensor-
open or short circuit is
detected.
•
Fixes the coolant tempera-
ture to 80
°
C.
Able
Able
22
Intake temperature
sensor
Intake temperature sensor-
open or short circuit is
detected.
•
Fixes the intake tempera-
ture to 20
°
C.
Able
Able
33
Faulty ignition
Open circuit detected in the
primary lead of the ignition
coil.
--
Unable
Unable
Main switch
OFF
Main switch
ON
Engine trouble
warning light
Light
OFF
Light ON for
1.4 seconds
Light
OFF
Initialize
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