FUEL INJECTION SYSTEM
8-76
Fault code No. 43 Symptom The ECU is unable to monitor the battery voltage (an open
or short circuit in the line to the ECU).
Diagnostic code No. 09 Fuel system voltage
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Relay unit coupler
• Main wire harness ECU coupler
• Front cowling wire harness coupler
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
Starting the en-
gine and oper-
ating it at idle.
2 Open or short circuit in the wire har-
ness and/or sub-wire harness.
• Repair or replace if there is an
open or short circuit.
• Between relay unit coupler and
ECU coupler.
(blue/yellow–blue/yellow)
(red/blue–red/blue)
• Between relay unit coupler and
main switch coupler.
(red–brown/blue)
• Between relay unit coupler and
engine stop switch coupler.
(red/black–red/black)
3 Malfunction or open circuit in fuel
pump relay.
• Execute the diagnostic mode.
(Code No. 09)
• Replace if defective.
• If there is no malfunction with
the fuel pump relay, replace the
ECU.
To Next Page
Loading...
