Suzuki VLR1800 Service Manual page 95

Malfunction
Detected Item
Code
C41
FP relay
H
P0230
L
C42
Ignition switch
P1650
C44/C64
O2 sensor
P0130/P0156 (For E-02, 19, 24, 33)
C46
EXCV actuator
H
P1657
L
P1658
C61
PAIR control solenoid
P1656 valve
C60
Cooling fan relay
P0480
C62 EVAP system purge
control solenoid valve
P0443
(For E-33)
Engine General Information and Diagnosis:
Detected Failure Condition
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.
Voltage is applied to fuel pump although fuel
pump relay is turned OFF.
No voltage is applied to the fuel pump,
although fuel pump relay is turned ON.
Ignition switch signal is not input to the ECM.
O2 sensor output voltage is not input to ECM
during engine operation and running
condition.
Sensor voltage > 1.0 V
C44 (P0156) or C64 (P0130) is indicated.
EXCVA position sensor produces following
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, communication signal does not
reach ECM or operation voltage does not
reach EXCVA motor, C46 (P1658) is
indicated. EXCVA can not operate properly.
EXCVA position sensor voltage is higher than
specified value.
EXCVA position sensor voltage is lower than
specified value.
When no actuator control signal is supplied
from the ECM, communication signal does not
reach ECM or operation voltage does not
reach EXCVA motor, C46 (P1658) is
indicated. EXCVA motor can not operate
properly.
PAIR control solenoid valve voltage is not
input to ECM.
NOTE
With two PAIR control solenoid
valves (E-02, 19, 24, 33);
When two PAIR control solenoid
valve signals are not received by
the ECM, the DTC "C61" (P1656) is
indicated.
Cooling fan relay signal is not input to ECM.
EVAP system purge control solenoid valve
voltage is not input to ECM.
Check For
Fuel pump relay, lead wire/
coupler connection, power
source to fuel pump relay and
fuel injectors
Fuel pump relay switch circuit
shorted to power source
Fuel pump relay (switch side)
Fuel pump relay circuit open or
short
Fuel pump relay (coil side)
Ignition switch, lead wire/
coupler
O2 sensor is circuit open or
shorted to ground
EXCVA, EXCVA lead wire/
coupler
EXCVA position sensor circuit
shorted to VCC or ground
circuit open
EXCVA position sensor circuit
open or shorted to ground or
VCC circuit open
EXCVA, EXCVA motor lead
wire/coupler
PAIR control solenoid valve,
lead wire/coupler connection
Cooling fan relay, lead wire/
coupler connection
EVAP system purge control
solenoid valve, lead wire/
coupler connection
1A-26