DTC P0118: ECT Sensor Circuit High Voltage
- Turn the ignition switch ON (II).
- Check the ECT with the scan tool.
Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?
YES |
- Go to step 3. |
NO |
- Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the ECT sensor and at the ECM/PCM. |
- Turn the ignition switch OFF.
- Disconnect the ECT sensor 2P connector.
- Connect the ECT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
ECT SENSOR 2P CONNECTOR
JUMPER WIRE
Wire side of female terminals
- Turn the ignition switch ON (II).
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- Check the ECT with the scan tool.
Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?
YES |
- Go to step 8. |
NO |
- Replace the ECT sensor. |
- Turn the ignition switch OFF.
- Remove the jumper wire.
- Connect ECM/PCM connector terminals A10 and B8 with a jumper wire.
ECM/PCM CONNECTORS
JUMPER WIRE
Wire side of female terminals
- Turn the ignition switch ON (II).
- Check the ECT with the scan tool.
Is -20°C (-4°F) or less (or L-Limit in Honda mode of PGM Tester) or 5 V indicated?
YES |
- Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM. |
NO |
- Repair open in the wire between the ECM/PCM (A10, B8) and the ECT sensor. |
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