Dtc P0117: Ect Sensor Circuit Low Voltage - Honda Civic 2002-2003 Service Manual

PGM-FI System
OTe Troubleshooting (cont'd)
OTe P0117: ECT Sensor Circuit Low Voltage
1. Turn the ignition switch ON (II).
2. Check the ECT with the scan tool.
Is 150'C (302'F) or higher (or H-Limit in Honda
mode of PGM Tester) or 0 V indicated?
YES-Go to step 3.
NO-Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the ECT sensor and a!the ECM .•
3. Disconnect the ECT sensor 2P connector.
4. Check the ECT with the scan tool.
Is 150'C (302 'F) or higher (or H-Limit in Honda
mode of PGM Tester) or 0 V indicated?
YES-Go to step 5.
NO-Replace the ECT sensor .•
5. Turn the ignition switch OFF.
6. Disconnect ECM connector 8 (24P).
11-58
7. Check for continuity between the ECT sensor 2P
connector terminal No.1 and body ground.
ECT SENSOR 2P CONNECTOR
Wire side of female terminals
Is there continuity?
YES-Repair short in the wire between the ECM
(88) and the ECT sensor .•
NO-Update the ECM if it does not have the latest
software,or substitute a known-good ECM, then
recheck (see page 11-6). If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•