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4-32 FI SYSTEM DIAGNOSIS
DTC No.
DETECTED
ITEM
DETECTED FAILURE CONDITION CHECK FOR
C44
HO2 sensor
(For E-02,
19)
HO2 sensor output voltage is not input
to ECM during engine operation and
running condition.
(Sensor voltage < 0.55 V)
In other than the above value, C44
(P0130) is indicated.
HO2 sensor circuit open or
shorted to ground
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
C46
Exhaust con-
trol valve
actuator
EXCVA position sensor produces fol-
lowing voltage.
0.1 V sensor voltage < 4.9 V
In other than the above range, C46
(P1675) is indicated.
When no actuator control signal is
supplied from the ECM, communica-
tion signal does not reach ECM or
operation voltage does not reach
EXCVA motor, C46 (P1658) is indi-
cated. EXCVA can not operate.
EXCVA, EXCVA lead wire/cou-
pler
P1657
H
EXCVA position sensor voltage is
higher than specified value.
EXCVA position sensor circuit
shorted to VCC or ground circuit
open
L
EXCVA position sensor voltage is
lower than specified value.
EXCVA position sensor circuit
open or shorted to ground or
VCC circuit open
P1658
When no actuator control signal is
supplied from the ECM, communica-
tion signal does not reach ECM or
operation voltage does not reach
EXCVA motor, C46 (P1658) is indi-
cated. EXCVA motor can not operate.
EXCVA, EXCVA motor lead
wire/coupler
C49 PAIR control
solenoid
valve
PAIR control solenoid valve voltage is
not input to ECM.
PAIR control solenoid valve, lead
wire/coupler
P1656
C60 Cooling fan
relay
Cooling fan relay signal is not input to
ECM.
Cooling fan relay, lead wire/cou-
pler connectionP0480