Acura Integra 1998 Service Manual page 300

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P1681 | The scan tool indicates Diagnostic Trouble Code (DTC) P1681: A low voltage problem in the A/T Fl signal A
circuit.
P1682 | The scan tool indicates Diagnostic Trouble Code {DTC) Pl682: A high voltage problem in the A//T Fl signal A
circuit.
]TtOgOl fh" scan tool indicates Diagnostic Trouble Code (DTC) P1686: A low voltage problem in the A"/T Fl signal B
ctrcutt.
lFt Ogt-l fh" scan tool indicates Diagnostic Trouble Code (DTC) P1687: A high voltage problem in the A"/T Fl signal B
crrcurt.
ECM CONNECTOR C {31PI
IGRN/BLU)
Wire side of female terminals
TCM CONNECTOR {22P) {C419}
Wire side of female terminals
2 ! a 5
't0
t l 12 1 3 t a
t a
t 6 I t
1 a 19 ,/
AFSB
I I
AFSA
{GRYI T-
_IIGRN
@ ) o
2 3
1 1 t o
2 1 ; '
1 5 1 5 1 7 1 3 1 3
E
./ zl za
G
-\
AFS
IGR
\-
a
AF
lGl
I
s B l
L]
r@!
I AFSA
| {GRN/
l R t l t l
iFS
G R I
A
[/BLUt
1 2 3 a 5 6 7 8 9
tz /'tt //t't
/ts
zo
to ,/
DTC P1681, P1682, P1686 end/
or P'1687 are stored.
Problem verificetion:
1. Do the ECM Reset Procedure.
2. orive the car for several miles
s o t h a t t h e t r a n s m i s s i o n
upshifts and downshifts sev
e r a r l r m e s .
Intormittent lailure. system is OK
at thi3 tim€. Check tor ooo. con-
nections or loo3o wir6s al C419
{TCM} .nd ECM.
ls DTC P1681, P1682, Pl686
and/or P1687 indicated?
Check tor a short in th6 wires
{AFSA, AFSB linel:
1. Turn the ignition switch OFF.
2, Disconnect the 22P connector
from the TCM.
3. Disconnect the ECM conn6c-
t o r C ( 3 1 P ) .
4. Check for continuity between
b o d y g r o u n d a n d E C M c o n -
nector terminal C28 (C27)*.
Rcoair 3hort in tho wiros between
ECM lC28 or C27*l rnd TCM.
ls there continuity?
Check fo. an open in the wires
IAFSA, AFSB lines):
Check for continuity between ECM
connector terminal C28 (C27)* and
TCM 22P connector terminal No. 7
( N o . 6 i * .
Repai. opsn in the wiros bdtween
ECM lC28 or C27'l and TCM.
S u b s i i i u t g a k n o w n - g o o d E C M
end r6ch€ck. lf 3ymptom/indica-
tion goes away, repl.c6 the origi-
nal ECM.
":DTC P1686 or Pl687 (NT Fl sisnal 8l
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