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MALFUNCTION CODE AND DEFECTIVE CONDITION
DTC No.
DETECTED
ITEM
DETECTED FAILURE CONDITION CHECK FOR
C40
P0505
H
ISC valve ISC valve motor current is higher than
specified value.
ISC valve circuit shorted to
BATT or ground circuit open
L
ISC valve motor circuit is open. ISC valve circuit open or BATT
circuit open
P0506
Idle speed is lower than the desired
idle speed.
W/Y or Lg wire open or ground
circuit open
Air circuit clogged
ISC valve is fixed
P0507
Idle speed is higher than the desired
idle speed.
W/Y or Dgr wire open or shorted
or ground circuit open
ISC valve is fixed
ISC valve hose connection
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/cou-
pler connection, power source to
fuel pump relay and fuel injec-
tors
P0230
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
ECM.
Ignition switch, lead wire/coupler
P1650
C44/C64
O2 sensor
(E-02, 19, 24,
51)
O2 sensor output voltage is not input
to ECM during engine operation and
running condition.
(Sensor voltage < 0.45 V)
In other than the above value, C44
(P0156/0130) is indicated.
O2 sensor circuit open or
shorted to ground
P0156/P0130
14- VZR1800 ('08-MODEL)16
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