Electrical Troubleshooting - Honda Prelude 1993 Service Manual

Electrical Troubleshooting
Troubleshooting Flowchart
Possib16 Caus6
. Oisconn6ct€d lock-up control
sol€noid valv6 A connector
' Short or open in bck-up con-
trolsol€noid vslv6 A wire
' Fauhy lock-up control solenoid
NOTE: Vi6w f rom terminalsid6.
Soff-dirgnosis I I,a I indicstor
lght blink. onc.--
Disconnect the 26 P connec-
tor trom the TCM,
Turn the ignition swhch ON.
Msasure the vohago betw€6n
th6 AO (RED/WHT) and A25
(BLK/RED) or A26 (BRN/BLK)
terminals.
Ropair thorl to power rouaca
in REDMHT wlro botwo6n
tho AO tormln l and the lock-
uD conlrol lolonold valvo A.
Turn the ignition switch OFF.
Measure the resistance b6-
tw€6n th€ A6 (RED/WHT) and
A25 (BLK/RED) or A26 (BRtl/
BLKlterminals.
Chcck for bo.o TCM cor|r|oc-
torg. It nacollgry, lubrtftute
a known-good aolenoid vtlvo
a s s o m b l y o . T C M o n d
rochock.
ls th6 resistanco 12-24 O ?
Diconn6ct th6 2P connector
i.om the lock-up control sob.
noid valve assembv.
Check tor continuity betw€on
the A6 (BED/WHT) snd A25
GLKi RED) or A26 (BRIVBLK)
tgrminsls.
Bopah lhort to ground In RED
/wHT wire betwoon tho AB
tormlml and tho bck-uD con-
trol 3olonold vrlva A.
Mgasure th6 resistance ot the
solenoid at the 2P connsctor
(1+62).
Chock for opon In RED/WHT
wire between thc A6 tarmlnal
and the lock-up control roL-
nold valve A.
fs the resistanc€ 12-24 A?
Rophce the bck-up cofirol
aolonoid vafuo a$ombly.
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