1A-110 Engine General Information and Diagnosis:
DTC “C46” (P1657-H/L or P1658): EXCV Actuator Circuit Malfunction
B823H11104033
Troubleshooting
CAUTION
!
When using the multi-circuit taster, 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-14)”.
Detected Condition Possible Cause
C46
The operation signal does not reach the
EXCV actuator.
EXCVA position sensor voltage low or
high
0.1 V d Sensor voltage < 4.9 V
(without the above range)
EXCVA can not operate properly.
• 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.
P1657
H
Sensor voltage is higher than specified
value.
L
Sensor voltage is lower than specified
value.
P1658
The operation signal does not reach the
EXCVA motor.
ECM does not receive communication
signal from the EXCVA motor.
EXCVA can not operate properly.
ECM
EXCVA
VCC
EXCVAS
EXCVA 㧗
EXCVA 㧙
E2
B/R
R/BP
Gr
B/Br
W
LblY
RB
4
3
11
5
29
I823H1110157-05
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