DTC P0118-00: ECT Sensor No. 1 Circuit High Input: Outline
DTC P0118:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
ECT sensor No. 1 circuit high input |
| Detection condition |
- The PCM monitors the ECT sensor No. 1 signal. If the PCM detects that the ECT sensor No. 1 voltage at the PCM terminal 1AH is above 4.94 V for 5 s, the PCM determines that the ECT sensor No. 1 circuit has a malfunction.
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| Fail-safe |
- 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 No. 1 connector or terminals malfunction
- ECT sensor No. 1 malfunction
- PCM connector or terminals malfunction
- Short to power supply in ECT sensor No. 1 signal circuit
- Open circuit in any of the following ECT sensor No. 1 circuits.
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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