Dtc P0118: Ect Sensor Circuit High Voltage - Honda Civic 2002-2003 Service Manual

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OTe P0118: ECT Sensor Circuit High Voltage
1. Turn the ignition switch ON (III.
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 terminals at
the ECT sensor and atthe ECM .•
3.
Turn the ignition switch OFF.
4. Disconnect the
EeT
sensor 2P connector.
5. Connect the EeT sensor 2P connector terminals
No.1 and No.2 with a jumper wire.
ECT SENSOR 2P CONNECTOR
ECT
IRED/WHTI
SG2
(GRN/VELI
JUMPER WIRE
Wire side of female terminals
6. Turn the ignition switch ON (II).
7. Check the ECTwith 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 connector terminals A 10 and B8 with
a jumper wire.
ECM CONNECTORS
A (31 PI
B (24 PI
JUMPER WIRE
Wire side of female terminals
11. Turn the ignition switch ON (III.
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- Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-61. If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
NO-Repair open in the wire between the ECM
(A 10, B81 and the ECT sensor .•
11-59