VL1500K5 (’05-MODEL) 63
“C18” (P1751) DECOMP. RELAY CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Remove the right frame upper cover.
(
!
VL1500 Service Manual 6-3)
2) Turn the ignition switch OFF.
3) Check the Decomp. relay coupler for loose or poor contacts.
If OK, then check the Decomp. relay.
(
!
VL1500 Service Manual 7-20)
Is the Decomp. relay OK?
4) After repairing the trouble, clear the DTC using SDS tool.
(
!
Page 42)
DETECTED CONDITION
POSSIBLE CAUSE
Decomp. relay signal is not input to ECM.
• Decomp. system circuit open or short.
• ECM malfunction.
ECM
Decomp. solenoid
Side-stand
relay
Ignition
switch
Decomp. relay
Engine stop
switch
DRL
W
R
G/R
O/W
To GP
switch
1
YES
• O/W or G/R wire open or shorted to ground, or
poor
i
connection.
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO
Replace the Decomp. relay with a new one.
ECM coupler (Harness side)
1
SA
MP
LE
