Main Relay - Honda Civic 1998 Service Manual

Main Relay
Diagnostic Trouble Code (DTC) 54: Main R€lay Disgnosis
YES
N O T E : R e i n s t a l l
t h e f u s e i f i t i s O K .
ABS CONTROL UNIT 26P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS
ABS CONTROL UNIT 22P CONNECTOR
B1
(WHT/GRNI
PCOM
{GRN/WIIT)
SCOM
{BLK/WHTI
( c o n t ' d )
WIRE SIDE OF FEMALE TERMINALS
t 6 1 7
-
With tho ignition switch ON
{ll}, ABs indicator light do.s
not go off.
-
With the SCS 3oruics connec-
tor conn.ctod h6e Psgc 19601,
DTC g b indcst d.
check the ABs +B (20 A) fuse.
Raplac! lha fuso snd lachock.
Ch6ck for .n open in thc 81, 82
circuh:
M e a s u r e t h e v o l t a g e b e t w e e n
body ground and the ABS control
unit 26P connector terminal No. 14
and No. 15 individually.
Ropair open in th. wi.o bdtw.en
tho ABS control unit and under'
hood ABS tuse/rol.y box.
ls there battery voltage?
Check lor a ihon to body Itound
in the PMR citcuit:
1. Turn the ignition switch OFF.
2, Removethe pump motor relay.
3. Disconnect the ABS control
unit 22P connector.
4. Check for continuity between
t e r m i n a l N o . 1 9 a n d b o d y
ground.
Ropair short to bodY ground in
tho wiro botwean th. undel'
hood ABS fu3e/.ehY box tnd
ABS control unil.
ls there continuity?
Check for a short lo bodY ground
in the PCOM, SCOM cilcuit:
1 . D i s c o n n e c t t h e A B S c o n t r o l
unit 26P connector.
2. Check for continuity between
body ground and the ABS con-
trol unit 26P terminals No l
and No. 2 individually.
. Repair short to bodY ground in
the PCOM circuit wirs bctween
tho ABS control unit and undor_
hood ABS t6o/r.lay box.
. R€pair 3hon lo bodY ground in
th6 PCOM oJ SCOM cilcuit wiro
botwoen the ABS control unit
end modulator unit.
' R o p l a c e t h e m o d u l t t o r u n i t .
(Short circuh in3ide th6 unitl
ls there continuity?
(To page 19-60)
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