Honda Civic Service Manual page 298

DTC Pl167: Ay'F Sensor (Sensor 1) Heater
Circuit Malfunction
NOTE: lf DTC P1162 is stored at the same time as DTC
P1167, troubleshoot DTC P1162 first, then troubleshoot
D T C P 1 1 6 7 .
1 . R e s e t t h e E C I \ 4 ( s e e p a g e 1 1 - 4 )
2. Start the engine. Wait for at least 80 seconds.
ls DTC P01167 ind icated?
YES Go to step 3.
NO-lntermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the Ay'F sensor relay, at the Ay'F sensor (Sensor 1),
a n d a t t h e E C M . I
Turn the ignition switch OFF.
Disconnect the A,/F sensor 4P connector and ECM
connector A (31P).
Connect the Ay'F sensor (Sensor 1) 4P connector
t e r m i n a l s N o . 2 a n d N o . 1 w i t h a j u m p e r w i r e .
?
5 .
A/F SENSOR (SENSOR 1)
4P CONNECTOR
JUMPER WIRE
Wire side of
f e m a l e t e r m i n a l s
6. Check for continuity between ECM connector
t e r m i n a l s , 4 6 a n d 4 1 6 .
ECM CONNECTOR A {31P)
AFS- {RED)
trTzTil,ils l
l t 9
t 8 2C21
l?rlzsIels
AFS
IRED/YEL)
Wire side of lemale terminals
ls thete continuity?
Y E S - R e p l a c e t h e A / F s e n s o r ( S e n s o r 1 ) . 1
NO-Repair open in the wire between the Ay'F
s e n s o r ( S e n s o r 1 ) a n d t h e E C M ( 4 6 o r A 1 6 ) . I
1 1 - 9 1