1A-48 Engine General Information and Diagnosis:
DTC “C15” (P0115-H/L): ECT Sensor Circuit Malfunction
B823H11104013
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
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 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
C15
Output voltage is not with in the following
range.
0.15 V d Sensor voltage < 4.85 V
• ECT sensor circuit open or short.
• ECT sensor malfunction.
• ECM malfunction.
P0115
H
Sensor voltage is higher than specified
value.
• ECT sensor circuit is open or ground circuit open.
L
Sensor voltage is lower than specified
value.
• ECT sensor circuit shorted to the ground.
ECM
E2
ECTS
B/Br
ECT sensor
B/BI
10
29
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