Yamaha YZF-R1P Utility Trailer User Manual


 
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FI
FUEL INJECTION SYSTEM
Fault code No. 43 Symptom The ECU is unable to monitor the battery voltage.
Used diagnostic code No. 09 (fuel system voltage)
Inspection operation item and probable cause Operation item and countermeasure Reinstatement
method
Malfunction in ECU Fuel injection system relay is on. Reinstated by
starting the engine
and operating it at
idle.
Open or short circuit in the wiring harness. Repair or replace if there is an open or short
circuit.
Between battery terminal and ECU coupler.
Red - White
Red - Blue/Yellow (Main switch and engine
stop switch are on.)
Red - Red/Blue (Fuel injection system relay
is on.)
Malfunction or open circuit in fuel injection sys-
tem relay
Replace if defective.
1. Disconnect the starting circuit cut-off relay
from the wire harness.
2. Connect the pocket tester ( × 1) and bat-
tery (12 V) to the starting circuit cut-off
relay terminals as shown.
3. Does the starting circuit cut-off relay have
continuity between blue/white and black?
Connected condition of connector
Inspect the coupler for any pins that may
have pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Starting circuit cut-off relay coupler
(fuel injection system relay)
ECU coupler
Battery positive terminal
red/black
1
Battery positive terminal
blue/yellow
2
Tester positive probe
red
3
Tester negative probe
red/blue
4