Honda BF135A Manual page 39

BF135A•BF150A
From P. 2-28 (A)
Check the low pressure fuel system (P.
5-96).
Is the low pressure fuel system nor-
mal?
YES
Check the high pressure fuel system
(P. 5-96).
Is the high pressure fuel system nor-
mal?
YES
Perform idle control system trouble-
shooting. If it is normal, Substitute a
known-good ECM and recheck
From P. 2-28 (B)
Check for open circuit in the fuel
pump power line.
1 Disconnect the main relay 2P
connector.
2 Check for continuity between the
No. 1 (Blue/Red) terminal of the
harness side main relay 2P con-
nector and the No. 1 (Blue/Red)
terminal of the fuel pump 2P con-
nector.
PGM-FI main
Fuel pump
relay harness
harness side
side 2P
2P connector
connector
Viewing from
terminal side
Is there continuity?
YES
Check the (high pressure) fuel pump
(P. 5-107).
Is the fuel pump normal?
YES
Substitute a known-good ECM and
recheck.
NO
NO
Replace or repair the wire har-
NO
ness (Open circuit in the fuel
pump power line).
NO Replace the (high pressure)
fuel pump.
Repair the faulty part.
Repair the faulty part.
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