FI
Fault code No.
43
Symptom
The ECU is unable to monitor the battery voltage.
Used diagnostic code No. 09 (fuel system voltage)
Order Inspection operation item and probable
cause
Operation item and countermeasure
Reinstatement
method
1
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
Reinstated by
starting the
engine and
operating it at
idle.
2
Malfunction in ECU
Fuel injection system relay is on.
3
Open or short circuit in the wiring har-
ness.
Repair or replace if there is an open or short circuit.
Between battery terminal and ECU coupler
Red/white – Red/white
Red – Blue/Red (Main switch and engine stop
switch are on.)
Red – Red/Blue (Fuel injection system relay is
on.)
4
Malfunction or open circuit in fuel injec-
tion system relay
Execute the diagnostic mode (Code No.09).
Replace if defective.
NOTE:
When the leads are disconnected, the voltage
check by the code No.09 is impossible.
1. Disconnect the fuel injection system relay from
the wire harness.
2. Connect the pocket tester (
Ω
×
1) and battery
(12 V) to the fuel injection system relay terminals
as shown.
3. Does the fuel injection system relay have conti-
nuity between blue/white and black?
Battery positive terminal
→
red/white
Battery positive terminal
→
blue/red
Tester positive probe
→
red/green
Tester negative probe
→
red/blue
FUEL INJECTION SYSTEM
81
Содержание RX10LTGTAX
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