Honda Civic Service Manual page 1004

I
Individual
Multiplex
DTC
Probable Cause
The multiplex control unit cannot
receive signals from the gauge
assemDty.
'l
Faulty power or ground to the
gauge assembly
2 . Faulty gauge assemblv
3 .
Faulty under-dash f use/relay
box
The multiplex control unit cannot
receive signals from the ECM
1
Faulty power or ground to the
E C M
2 .
F a u l t y E C M
?
Faulty under-dash fuse/relay
box
J
Internal failure of the multiplex
control unit
1
Faulty under-dash fuse/relay
box
5
The gauge assembly cannot receive
signals from the multiplex control
u n i t a n d t h e E C M
Faulty power or ground to the
g a u g e a s s e m b t v
F a u l t y q a u g e a s s e m b l v
6
The ECM cannot receive signals
from multiplex control unit and the
gauge assembty
1 Faulty power or ground to the
E C M
F a u l t y E C M '
I
'Before
replacing a Faulty ECM/PCM make sure it
has the latest software revision. UDdate if
necessary before swapping or replacing.
DTCs
Multiplex
DTC
Probable Cause
1 , 2 a n d 3
&
ECM DTC
P0600
S i m u l t a n e
o u s l y
Short to ground on one of the
communication wires.
Short to ground on the YEL wire
between the PCM terminal E24
and the under-dash fuse/relay
b o x t e r m i n a l E 1 0
2 . Short to ground on the WHT/
GRN wire between the Gauge
assembly terminal A2 and
under-dash fuse/relay box
t e r m i n a l K 1 0
1 a n d 6
S i m u l t a n e
o u s l y
Open in the communication wire
I
Open in WHT/GRN wire
between the under-dash fuse/
relay box terminal K10 and the
Gauqe assemblV terminal 42
2 a n d 5
S i m u l t a n e
o u s l y
O p e n i n t h e c o m m u n i c a t i o n w i r e
1 Open in the YEL wire between
the under-dash fuse/relay box
t e r m i n a l E 1 0 a n d E C M t e r m i n a l
(cont'd)
22-173