Engine General Information and Diagnosis: 1A-62
DTC “C40” (P05057): ISC Valve Circuit Malfunction
B831G21104019
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
• Be careful not to disconnect at lease 3 seconds after ignition switch is turned to OFF.
If the ECM coupler is disconnected within 3 seconds after ignition switch is turned to OFF, there is a
possibility of an usual valve being written in ECM and causing an error of ISC valve operation.
• When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent the terminal damage or terminal bend.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-13)”.
Detected Condition
Possible Cause
No voltage is applied to ISC valve motor, although ignition
switch is turned ON, or voltage is applied to ISC valve
motor, although ignition switch is turned OFF.
• ISC valve circuit open or shorted to the ground.
• ISC valve malfunction.
• ECM malfunction.
ISC valve
ECM
IS1A
M
BATT
IS1B
B/Lg
R/B
P/W
IS2A
G
IS2B
W/Bl
17
4
34
16
33
I831G1110062-01
I831G1110019-01
Summary of Contents for 2009 LT-A750XK9
Page 2: ......
Page 4: ......
Page 5: ...SUPPLEMENTS L LT A750XK9 09 MODEL 10 LT A750XPK9 09 MODEL 11 ...
Page 29: ...0A 15 General Information 99565 01010 013 CD ROM Ver 13 ...
Page 57: ...0B 28 Maintenance and Lubrication 09915 40610 Oil filter wrench Page 0B 12 Page 0B 12 ...
Page 68: ...0C 11 Service Data ...
Page 310: ...1K 5 Exhaust System ...
Page 482: ...4D 6 Parking Brake ...
Page 528: ...6B 13 Steering Handlebar ...
Page 581: ......