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3-48 FUEL SYSTEM (DFI)
Self-Diagnosis
Service
Codes
Parts
Output Signal Usable
Range or Criteria
Backups by ECU
34
Exhaust
Butterfly
Valve
Actuator
Exhaust Butterfly Valve
Output Voltage
0.2 ∼ 4.8 V
If the exhaust butterfly valve system fails (the
signal is out of the usable range, wiring short
or open), the actuator locks exhaust butterfly
valve at full closed position.
35
Immobilizer
Amplifier
–
If the i mmobilizer system fails (no signal, wiring
short or open), the vehicle is no start and run.
36
Master or
User Key
The user or master key
must use register key.
If the blank key or broken key is used, the
vehicle is no start and run.
46
Fuel Pump
Relay
When the relay ON
condition, battery monitor
voltage 5 V or more
If the relay fails, battery monitor voltage 12 V.
51
Stick Coil
#1 (Ignition
Coil)*
The ignition coil primary
winding must send signals
(output voltage) 32 or more
times continuously to the
ECU.
If the ignition primary winding #1 has failures
(no s ignal, wiring short or open), the ECU
shuts off the injector #1 to stop fuel to the
cylinder #1, though the engine keeps running.
52
Stick Coil
#2 (Ignition
Coil)*
The ignition coil primary
winding must send signals
(output voltage) 32 or more
times continuously to the
ECU.
If the ignition primary winding #2 has failures
(no s ignal, wiring short or open), the ECU
shuts off the injector #2 to stop fuel to the
cylinder #2, though the engine keeps running.
53
Stick Coil
#3 (Ignition
Coil)*
The ignition coil primary
winding must send signals
(output voltage) 32 or more
times continuously to the
ECU.
If the ignition primary winding #3 has failures
(no s ignal, wiring short or open), the ECU
shuts off the injector #3 to stop fuel to the
cylinder #3, though the engine keeps running.
54
Stick Coil
#4 (Ignition
Coil)*
The ignition coil primary
winding must send signals
(output voltage) 32 or more
times continuously to the
ECU.
If the ignition primary winding #4 has failures
(no s ignal, wiring short or open), the ECU
shuts off the injector #4 to stop fuel to the
cylinder #4, though the engine keeps running.
62
Subthrottle
Valve
Actuator
The actuator operates
open and close of the
subthrottle valve by the
pulse signal from the ECU.
If the subthrottle actuator fails (the signal is out
to the usable range, wiring short or open), the
ECU stops the current to the actuator.
63
Exhaust
Butterfly
Valve
Actuator
The actuator operates
open and close of the
exhaust butterfly valve by
the pulse signal from the
ECU.
If the exhaust butterfly valve actuator fails (the
signal is out to the usable range, wiring short
or open), the ECU stops the current to the
actuator.
67
Oxygen
Sensor
Heaters (#1
and/or #2)
(Europe
Models)
The oxygen sensor heaters
(#1 and/or #2) raise
temperature of the sensor
for its earlier activation. 12
V-36 W, 1.5 A × 2
If the oxygen sensor heaters (#1 and/or #2)
fails (wiring short or open), the ECU stops the
current to the heaters.
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