Honda Civic 1998 Service Manual page 653

Troubleshooting Flowchart - TMA and TMB Signals
Po$ible Csuse
. S h o r t o r o p e n i n T M A w i r e
between B? terminal and ECM
. S h o r t o r o D e n i n T M B w i r e
beiwoen 86 terminal and ECM
. Faultv ECM
' F.ultv TCM
TCM CONNECTOR B I22P)
GRY
WIRE SIDE OF F€MALE TERMINALS
GRY
GRY
{ c o n t ' d )
o
I
2
a
6 t 7 8
I
1 0
1 2
't3
1 a 1 5 1 6 1 7 1 8
20
ECM CONNECTOB C 131P)
GRY
2 3 1
s J s ; l I
I
1 1 12
t 3
t 4
16
17lle /t./
22
/ /
/ / l 2 s
I
1
1 5
7 8 I
1 0
12 13
1 4
1 6 1 7 1 8
20
ECM CONNECTOR C {31P)
1
2
I
5 6 7 8
10
11 12 1 3 1 4
t 5
1 7
r 8
t/
4r
30
. OBO ll Scan Tool indicate3 Code
P1665.
. Seff-dirgnosis E indicator light
indicstos Cod€ 37.
Check TMA Wire ContinuitY:
1. Turn the ignition switch OFF.
2. Disconnect the B (22P) con-
nector from the TCM.
3 . D i s c o n n e c t t h e C ( 3 1 P ) c o n
nector from the ECM.
4. Check for continuity between
t h e 8 7 t e r m i n a l o f t h e T c M
a n d t h e C g t e r m i n a l o f t h e
E C M .
R€pair open in the wiro between
the TCM and the ECM.
Chock TMA wite lor a Shorl Ci.-
cuiti
Check lor continuity between the
87 terminal of the TCM or the Cg
t e r m i n a l o f t h e E C M a n d b o d y
ground.
ls there continuity?
Check the ECM:
1 . R e c o n n e c t t h e C { 3 1 P ) c o n
nector to the ECM, and the B
{22P) connector to the TCM.
2. Turn the ignition switch ON (ll).
3. Measure the voltage between
t h e c 9 t e r m i n a l o f t h e E c M
and body ground.
Check fo. loose ECM connectors.
ll necessary, substitute a known'
good ECM and r€check.
ls there approx. 10 V?
To page 14-216
14-215