Honda Prelude 1993 Service Manual page 504

s.fil|lno.lt I D4 | Indcliot
|!t'n b&*! tlv!-m.t.
Turn th6 ignhion swhch ON.
Obs€rve tho A/T 906r position
indbator, 6nd saloct oach posF
tion sopr6aat6ly.
So. A/T g€.r po.hlon Indl-
€ior
l.Epactlon (raa aactlon
23).
Do ony irdicalors tail to
light wh€n shift€d through
sll positionsT
Turn tho ignition swhch OFF.
Connoct the Tost Hamoss
b€twoon th6 TCM and connoc-
tors {'l+3$.
Turn the ignhion swhch ON.
Mo.surc tho vohago botwoen
tho A21 and A2gA28 termi
nals.
Chock to. .ho.l ln GRI{/RED wl.. b.tween tho A2l to.irjnrl |nd
th. A/T o.!r po.hlon lwhch or A/T gelr po.ltlon Indhlto.. It wlr.
l! OK, chack fof bolo TCM connoctorr. ll nacallary. aubtthula a
known.good TCM and rochock.
ls th€re battory volta€g?
Msssure th6 vohag€ b€twoen
tho A19 ard A2tA26 tormi-
na|s.
Chock loJ .hort ln LT GRN wlr. belw..n tho A19 tormlnll rnd th.
A/T gelr po.ltlon Indlcltor or . lhort In GRN/IVHT o. GRI{ wlrer
b.tw..n
th. A/T g€lr po.ltio.r Indlcltor lnd tho A/T golt pothlon
awhch. lf wlia b OK. c$acl tor loora TCM c$nactot!. lf nacoatlry,
.ubrtltut. t known-good TCM .nd r.chock.
Electrical Troubleshooting
Troubleshooting Flowchart (cont'd)
Possiblo CauE6
' Sho.t in A/T g6sr position
switch wir6
' Faulty A/T g€sr positioh
switch
NOTE:
Codg 5 is causod wh6n th€
TCM rsc6iv6s two gpar posi-
tion inputs at tho 3ame tim6,
Bsnery vohaoo?
o o ooooooooOo O I O:66irO O:fto:lG6{ticie,Ol ooo ooooooo o
o o o o o o o o o o o o o
I o o g s g o o c , l ' g o t t g o o I o o o o o o o o o o o
426
r@l
a21 A25
.-@r
Estt€rv voftaoo?
A 1 9 A 2 5
o o o o o o o o o o o o
o o o o o o o o o o o o
o o o o o o o o o o o
o o o o o o o o o o o
YES
To paga 1+43
14-42