Engine General Information and Diagnosis: 1A-74
DTC “C40” (P0505 / P0506 / P0507): ISC Valve Circuit Malfunction
B940H21104021
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
• Be careful not to disconnect the ISC valve coupler at least 5 seconds after ignition switch is turned
to OFF.
If the ECM coupler is disconnected within 5 seconds after ignition switch is turned to OFF, there is a
possibility of an unusual valve being written in the 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 terminal damage.
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
C40/P0505
The circuit voltage of motor drive is
unusual.
• ISC valve circuit open or shorted to the ground.
C40/P0506
Idle speed is lower than the desired
idle speed.
• Air passage clogged.
• ISC valve is fixed.
• ISC valve Preset position is incorrect.
C40/P0507
Idle speed is higher than the desired
idle speed.
• Disconnected ISC valve hose.
• ISC valve is fixed.
• ISC valve Preset position is incorrect.
ECM
IS1B
IS1A
IS2B
IS2A
ISC valve
B/R
B/Bl
Dg
B/G
47
38
40
49
I940H1110065-04
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
35
44
36
45
37
46
38
47
39
48
40
49
41
50
42
51
43
52
I940H1110012-03
Содержание Intruder VZ1500
Страница 2: ......
Страница 4: ......
Страница 14: ...00 9 Precautions ...
Страница 62: ...0C 12 Service Data ...
Страница 190: ...1D 1 Engine Mechanical Engine Engine Mechanical Schematic and Routing Diagram ...
Страница 484: ...4C 10 Rear Brakes ...
Страница 521: ...Clutch 5C 16 09920 53740 09930 40113 Clutch sleeve hub holder Rotor holder Page 5C 7 Page 5C 9 Page 5C 14 Page 5C 14 ...
Страница 522: ...5C 17 Clutch ...
Страница 536: ...6B 11 Steering Handlebar ...
Страница 580: ...Prepared by September 2008 Part No 99500 39370 03E Printed in U S A 580 ...