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Fault code No.
43
Diagnostic code No.
Order Item/components and probable
cause
1
Connections
• Relay unit coupler (fuel pump relay)
• Main wire harness ECU coupler
2
Open or short circuit in the wire
harness.
3
Malfunction or open circuit in fuel
pump relay.
Fault code No.
44
Diagnostic code No.
Order Item/components and probable
cause
1
Malfunction in ECU.
Symptom The ECU is unable to monitor the battery voltage (an open
or short circuit in the line to the ECU).
09
Fuel system voltage
Symptom Error is detected while reading or writing on EEPROM (CO
adjustment value).
60
EEPROM improper cylinder indication
FUEL INJECTION SYSTEM
Check or maintenance job
• 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
securely.
• Repair or replace if there is an
open or short circuit.
• Between fuel pump relay
coupler and ECU coupler.
(blue/red–blue/red)
(red/blue–red/blue)
• Between fuel pump relay
coupler and battery terminal.
(red–red)
• Between fuel pump relay
coupler and engine stop switch
coupler.
(black/red–black/red)
• Execute the diagnostic mode.
(Code No. 09)
• Replace if defective.
• If there is no malfunction with
the fuel pump relay, replace the
ECU.
Check or maintenance job
• Execute the diagnostic mode.
(Code No. 60)
1. Check the faulty cylinder. (If
multiple cylinders are
defective, the number of the
faulty cylinders appears
alternately at 2-second
intervals.)
• Replace ECU if defective.
7-60
Reinstatement
method
Starting the
engine and
operating it at
idle.
Reinstatement
method
Turning the
main switch to
"ON".
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