1A-21 Engine General Information and Diagnosis:
* : Immobilizer system is equipped model only.
C28
Secondary throttle
valve actuator
When no actuator control signal is supplied
from the ECM, communication signal does not
reach ECM or operation voltage does not
reach STVA motor, C28 (P1655) is indicated.
STVA can not operate.
STVA motor, STVA lead wire/
couplerP1655
C29
STP sensor
The sensor should produce following voltage.
0.35 V ≤ sensor voltage < 4.90 V
In other than the above range, C29 (P1654) is
indicated.
STP sensor, lead wire/coupler
connection
P1654
H Sensor voltage is higher than specified value.
STP sensor circuit shorted to
Vcc or ground circuit open
L Sensor voltage is lower than specified value.
STP sensor circuit open or
shorted to ground or Vcc circuit
open
C32
Fuel injector
No injector signal is detected for 0.8 sec.
In this case, the code C32 (P0201) is
indicated.
Primary fuel injector, wiring/
coupler connection, power
supply to the injector
P0201
C40 (P0505)
ISC valve
No IAC valve voltage is supplied after starting
the engine.
IAC valve, wiring/coupler
connection
C40 (P0506)
Idle speed is lower than the desired idle
speed.
Air passage clogged
ISC valve fixed
ISC valve pre-set position is
incorrect
C40 (P0507)
Idle speed is higher than the desired idle
speed.
ISC valve is fixed
ISC valve pre-set position is
incorrect
C41
Fuel pump relay
No voltage is applied to the fuel pump,
although fuel pump relay is turned ON, or
voltage is applied to fuel pump although fuel
pump relay is turned OFF.
Fuel pump relay, lead wire/
coupler connection, power
source to fuel pump relay and
fuel injectors
P0230
H
Voltage is applied to fuel pump although fuel
pump relay is turned OFF.
Fuel pump relay switch circuit
shorted to power source
Fuel pump relay (switch side)
L
No voltage is applied to the fuel pump,
although fuel pump relay is turned ON.
Fuel pump relay circuit open or
short
Fuel pump relay (coil side)
C42
Ignition switch
Ignition switch signal is not input to the ECM.
* When the I.D. agreement is not verified.
* ECM does not receive communication signal
from the immobilizer antenna.
Ignition switch, lead wire/
coupler, etc.
* Immobilizer/anti-theft system
P1650
C44
HO2 sensor (HO2S)
HO2 sensor output voltage is not input to ECM
during engine operation and running
condition.
In other than the above value, C44 (P0130) is
indicated.
HO2S lead wire/coupler
connection
Battery voltage supply to the
HO2S
P0130
C44
The Heater can not operate so that heater
operation voltage is not supply to the oxygen
heater circuit, C44 (P0135) is indicated.
HO2 sensor lead wire/coupler
connection
Battery voltage supply to the
HO2 sensor
P0135
Malfunction
Code
Detected Item Detected Failure Condition Check For
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