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Fault code No.
Symptom
Fail-safe system
Diagnostic code No.
FI diagnostic tool dis-
play
Checking method
Item Item/components and probable cause Check or maintenance job
2
Check the connection and locking con-
dition of the wire harness ECU coupler.
Disconnect the coupler and check the
pins. (bent or broken terminals and
locking condition of the pins)
3
Continuity of harness
4
FI diagnostic tool malfunction
5
Malfunction in ECU.
waiting for connection
Communication signal is not received.
Able to start (unable when ECU is malfunctioning)
Able to drive vehicle (unable when ECU is malfunctioning)
—
—
—
Poor connection → Properly
connect, repair, or replace.
Open or short circuit → Re-
place.
Between FI diagnostic tool
coupler and ECU coupler.
(Light green–Light green)
Replace the FI diagnostic
tool.
Replace the ECU.
7-41
FUEL INJECTION SYSTEM
Checking method
Set the switch on the
FI diagnostic tool sub-
wire harness to "ON",
and then check the
fault code display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 3.
Set the switch on the
FI diagnostic tool sub-
wire harness to "ON",
and then check the
fault code display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 4.
Set the switch on the
FI diagnostic tool sub-
wire harness to "ON",
and then check the
fault code display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 5.
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