Honda CB900F Service Manual page 108

FUEL SYSTEM (Programmed Fuel Injection)
Co nnect th e test harness to th e ECM connec-
to rs.
ECU TEST HA RNESS
~~
Q
No contin uity
• Open circuit in RedlYell ow w ire
[, _" " . , . . .. II ]
1 ==:1
C'-!' j " ··"""~
, ! ..•. •. _ . L '
li""'IT1
Connection: Red/Yellow - 69
Standard: Continuity
Continu ity
Connect the T P sensor 3P connect o r.
T P SENSOR
CONN ECTOR
Turn the ig nit ion switch ON.
M easure th e voltage at t he tes t ha rn ess term i-
nal s.
~
I = :: :::;
[ l! jl " " ... , - ..- .. - . .. . 9 1 ' .... .. .. .. , . . . . .
-f ! . ;
Connection: 68
(+ ) -
A22
l-I
Standard: * 0.4 - 0.6 V (throttle fully closed)
* 4.2 - 4.8 V (t hrottle fully open)
Normal
Replace the ECM wi th a new one, an d inspect it
agai n
Out of range
5-20
.. Fault y TP sen sor