Dtc "C46" (P1657-H/L Or P1658): Excv Actuator Circuit Malfunction - Suzuki GSX-R750 Service Manual

1A-112 Engine General Information and Diagnosis:

DTC "C46" (P1657-H/L or P1658): EXCV Actuator Circuit Malfunction

Detected Condition
The operation signal does not reach the
EXCV actuator.
EXCVA position sensor voltage low or
C46 high
0.1 V ≤ Sensor voltage < 4.9 V
(without the above range)
EXCVA can not operate properly.
Sensor voltage is higher than specified
H
value.
P1657
Sensor voltage is lower than specified
L
value.
The operation signal does not reach the
P1658 EXCVA motor.
EXCVA can not operate properly.
Wiring Diagram
EXCVA
Troubleshooting
CAUTION
!
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-15)".
Gr
P
B
Y
W
ECM coupler (Harness side)
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 33 34 35 36
Possible Cause
• EXCVA maladjusted.
• EXCVA circuit open or short.
• EXCVA motor malfunction.
• EXCVA position sensor malfunction.
• 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 motor circuit open or short.
• EXCVA motor malfunction.
B/R
R/B
R
Y
B/Br
37 38 39 40 41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70 71 72
B838H21104029
ECM
1 EXCVA
13 EXCVA
7 VCC
14 EXCVAS
35 E2
I837H1110096-02
I837H1110007-02