## PGM-FI System

#### DTC Troubleshooting (cont'd)

11-64

DTC P0118: ECT Sensor Circuit High Voltage

1. Turn the ignition switch ON (II).
2. 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.

3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. 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

6. Turn the ignition switch ON (II).

7. 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.

8. Turn the ignition switch OFF.
9. Remove the jumper wire.
10. Connect ECM/PCM connector terminals A10 and B8 with a jumper wire.

ECM/PCM CONNECTORS

JUMPER WIRE

Wire side of female terminals

11. Turn the ignition switch ON (II).
12. 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 11-6). 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.