Honda Civic 1998 Service Manual page 291

PGM-FI System
Heated Oxygen Sensor {HO2S) Heater (D16Y5 engine (M/Tl) (cont'd)
lTlLtl lh"
scan tool in^dicates Disgnostic Trouble Code (DTC) P1167: A system malfunction in the Primary Heated
.....-''.--....... Oxygen Sensor (Primary HO2S) (Sensor 1) Heater circuit.
PFIMARY HO2S (SENSOR 1) 8P CONNECTOR
lClil5l
ECM CONNECTOR C {3.IPI
The MIL he! bcofl ..oort.d
on.
DTC P1167 b stored.
Problom veffication:
1. Do the ECM Reset Procedure.
2 . S t a r t t h e e n g i n e . H o l d t h e
engine at 3,000 rpm with no
load 1A,/T in N or E position,
M/T in noulral) until the radia-
tor fan comes on.
Intermittent failure, systom k OK
at this time. Check for poor con-
noctions or looie wi.es at C145
lPrimary HO2S, Sen3or 1l and
ECM.
ls oTC1167 indicated?
Ch6ck for an op.n in the wire
{VS+ lin.):
1. Turn the ignition switch OFF.
2. Disconnect the Primary HO2S
(Sensor'1) 8P connector.
3. Turn the ignition switch ON {ll).
4. Measure vokage between the
P r i m a r y H O 2 S ( S e n s o r 1 l 8 P
connector terminal No, 6 and
body ground.
check rhe EcM:
M e a s u r e v o l t a g e b e t w e e n t h e
ECM connector terminal C25 and
body ground.
ls there morethan 5 V?
Repair open in thc wire ECM {C25}
and Primary HO2S lsensor 11.
ls there more than 5 V?
Sub3tilute a known-good ECM
and recheck, lf symplom/indica-
tion goes eway, leplace th€ origi-
nal ECM.
1 2
a
6 7
8 9
r 0
1 1
12
't3
t 4
1 5 1 1 6
1 1
l 8
23 21 25
2i 30
VS+
(WHT) Wire side of female
terminals
1 1- 10 2