Honda 2004 Odyssey Service Manual page 417

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0118 '99-00, '02-04 Models:
Sensor Circuit High Voltage
NOTE: Information marked with an asterisk ( ) applies
to '02-04 models.
1. Turn the ignition switch ON (II).
2. Check the ECT with the scan tool or the HDS.
Is 4°F ( 20°C) or less ( or L-Limit in the HDS),
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 the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. Connect ECT sensor 2P connector terminals No. 1
and No. 2 with a jumper wire.
ECT SENSOR 2P CONNECTOR
Wire side of female terminals
6. Turn the ignition switch ON (II).
7. Check the ECT with the scan tool or the HDS.
Is 4°F ( 20°C) or less ( or L-Limit in the HDS),
or 5 V indicated?
YES Go to step 8.
NO Replace the ECT sensor.
11-108
ECT
SG2 (GRN/BLK)
SG2 (GRN/YEL)*
JUMPER WIRE
ECT (RED/WHT)
8. Turn the ignition switch OFF.
9. Remove the jumper wire.
10. Connect PCM connector terminals C18 and C26
with a jumper wire.
PCM CONNECTOR C (31P)
ECT (RED/WHT)
JUMPER WIRE
Wire side of female terminals
11. Turn the ignition switch ON (II).
12. Check the ECT with the scan tool or the HDS.
Is 4°F ( 20°C) or less ( or L-Limit in the HDS),
or 5 V indicated?
YES Substitute a known-good PCM and recheck
(see page 11-5). If normal ECT readings are
indicated, replace the original PCM.
NO Repair open in the wire between the PCM
(C18, C26) and the ECT sensor.
SG2 (GRN/BLK)
SG2 (GRN/YEL)*