Honda CB900F Service Manual page 98

FUEL SYSTEM (Program m ed Fuel Inj ectio n)
PGM -FI SELF-DIAG NOSIS M AL FUNCTION INDICATOR LAMP (M IL)
FAILURE CODES
The PGM -FI MIL den ote s th e fail ure codes (the number of bl in ks fr om 0 to 33). When t he indicat or lights f o r 1.3 seconds it
is eq uivalent to t en blinks. Fo r example, a 1.3 second illumination and two blinks (0.5 seco nd X 2) of the ind icato r eq uals 12
blinks. Foll ow code 12 on page 5-26) .
When more than one failure occ urs, the MI L shows the blinks in th e order of low est num b er to highest number. For ex am-
ple, if the indi cat o r blinks once, the n two times, two fa ilures have occurred . Fo llow codes 1 an d 2 o n page 5-12).
N um ber of PGM -FI
Causes
Sy m pt o m s Ref er t o
MIL blin ks
(Fail-safe con tents) page
·
Open ci rcu it at the pow er input w ire of the
·
Engine does not st art
ECM
·
Faulty ba nk ang le sensor
·
Open ci rcuit in bank angle se nsor re lated
circ uit
·
Fau lty engine stop rela y
·
Op en circuit in engine stop relay relat ed w ires
- -
·
Faulty engine st op swit ch
0
P- o
Ope n ci rc uit in engine stop switch rela ted
w ires
Stay lit
·
Faul ty ignition switc h
·
Faulty ECM
·
Blow n PGM- FI fus e 120 A )
·
Op en circ uit in eng ine stop sw itch ground
·
Blown sub-f use (10 AIIStarte r/ig nitionl
0
0
Open o r sho rt ci rcui t in MIL w ire
·
Engine ope rates n or m ally
·
Faul ty ECM
--
No blinks
·
Sho rt circu it in service check co nnector
·
Engine operates normally
P-
·
Faul t y ECM
- -
·
Short circuit in serv ice chec k connector w ire
Stay lit
·
Loose or p oor co nt act s on MAP sensor
·
Engin e o perat es no rma lly
1
P-
connecto r
5-12
·
Open o r short circuit in MAP sensor wi re
Blinks
·
Fau lt y MAP sensor
a
·
Loose or poor con nect ion of the MAP sensor
·
Eng ine operates no rma ll y
2
· .
vacuum tube 5-14
Blinks
·
Faul ty MAP sensor
a
·
Loose or poo r contact on ECT sen sor
·
Har d st art at a low t em perat ur e
7
·
.
·
Open or sho rt circui t in ECT se nso r wire (Si m ulate usin g numerica l 5-16
.
,
.
Blinks
·
Faul t y ECT sens o r
va lues; 90°C/194°Fj
·
Loose o r poor co ntact on TP se nsor
·
Poo r eng ine response when
a
co nnector operating the throttle qu ick ly
8
·
-
5-18
.
,
.
0
Op en o r short circuit in TP se nso r w ire
(Simulat e using numerica l
Blinks
0
Faul ty TP sensor values; Thrott le opens 0')
P-
·
Loose or poor cont act on IAT senso r
·
Eng ine operates no rm all y
9
·
Op en or short circuit in IAT sensor w ire (Sim ulat e using numerical 5-22
Bli nks
·
Fault y IAT sensor v alu es; 25'Cn rF I
5-10