Engine Coolant Temperatuae Sensol - Honda Civic Service Manual

PGM-FI System
Engine Coolant Temperature (ECT) Sensor
('96 - 98 Models,'99 - 00 D16YS engane with M/T) (cont'd)
The sc€n tool indicates Diagnostic Trouble Code (DTC) P0118; A high voltage (low temperature) problem in the
Engine Coolant Temperature (ECT) sensor circuit.
ECt SENSOR 2P CONNECTOR {C1221
ECT
IRED/WHTI
JUMPER WIRE
sG2
(GRN/BLK)
W i r e s i d e o f f e m a l e t e r m i n a l s
ECM/PCM CONNECTOR D Il6PI
sG2 tGRN/81r0
W i r e s i d e o f I e m a l e t e r m i n a l s
-
Tho MIL ha3 bcen r€oorted on.
-
OTC m118 b stored.
Problom vorificttion:
1. Turn the ignition switch ON (ll).
2. Check the ECT with the scan
tool.
Intcrmitt.nt failui.. rydom is OK
at thir timc. Chack for Door con-
naction! or loor! wiaar at C122
IECT ..n.orl .nd ECM/rcM,
ls -4"F (-20'C) or less (or L-Limit
in Honda mode ol PGM Tester) or
5 V indicated?
Chsck lor sn open in thc ECT 3an-
soa:
1 . D i s c o n n e c t t h e E C T s e n s o r
2P connector.
z . L o n n e c r r n e E L t s e n s o r z F
connector terminals No. 1 and
No.2 with a jumper wire.
3. Check the ECT with the scan
tool.
ls -4'F (-20'C) or loss (or L-Limit
in Honda mode ol PGM Testerlor
5 V indicated?
Chack for an opon in the wire.
{ECT, SG2lin..l:
1. Turn the ignition switch OFF.
2. Connect ECM/PCM connector
terminals D2 and D11 with a
jump€rwire.
3. Turn the ignition switch ON (ll).
4. Check the ECT with the scan
t o o l .
ls -4'F 1-20'Clor less (o. L-Limit
in Honda mode ol PGM Tester)or
5 V indicated?
Reprir oprn in tha wirar bstwoon
CCM/PCM IDZ Dl1) .nd EGT rcn-
aor.
Sub3titut. s known-good ECM/
FCM and r.chcck, It normel ECT
i! indicatod, roplaco tho origin.l
ECM/PCM.
JUMPER WIRE
1 1 - 1 3 0