1A-52 Engine General Information and Diagnosis:
DTC “C15” (P0115-H/L): ECT Sensor Circuit Malfunction
B837H11104014
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 terminal damage.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-15)”.
Detected Condition Possible Cause
C15
Output voltage is not with in the following
range.
0.15 V ≤ 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 ground.
ECM
E2
ECTS
B/Br
ECT sensor
B/BI
32
35
I837H1110027-01
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I837H1110007-02
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