DTC P0118-00: ECT Sensor Circuit High Input: Notes
DTC P0118:00 (PCM, SKYACTIV-G 2.0) DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0118:00 |
ECT sensor circuit high input |
| DETECTION CONDITION |
- The PCM monitors the ECT sensor signal. If the PCM detects that the ECT sensor voltage at the PCM terminal 1AH is above 4.94 V for 5 s, the PCM determines that the ECT sensor circuit has a malfunction. Diagnostic support note
- This is a continuous monitor (engine cooling system).
- The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA/Snapshot data is available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Fixes the water temperature for the engine control at 40°C {104°F}, and for the idle air control at 80°C {176°F}.
- Operates the cooling fan (high speed rotation).
- Inhibits the fuel cut control during shift change.
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| POSSIBLE CAUSE |
- ECT sensor connector or terminals malfunction
- ECT sensor malfunction
- PCM connector or terminals malfunction
- Short to power supply in wiring harness between ECT sensor terminal A and PCM terminal 1AH
- Open circuit in wiring harness between the following terminals:
- ECT sensor terminal A-PCM terminal 1AH
- ECT sensor terminal B-PCM terminal 1AB
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.