SWS ± Troubleshooting
54B-8
DIAGNOSIS CODE INSPECTION PROCEDURES
Code No.11 Failure concerning the ETACS-ECU Probable cause
The ETACS-ECU monitors its own communication data, and sends a diagnosis
code when an error takes place consecutive fifteen times in 0.6 second.
The diagnosis code will be erased when the ETACS-ECU determines that its
own communication data is sent consecutive 15 times in 0.6 second.
D Malfunction of ETACS-ECU
Replace the ETACS-ECU.
Code No.12 Failure concerning the column switch or
improper connection with the ETACS-ECU
Probable cause
This diagnosis code is displayed when the column switch sends a signal
regardless of the transmission request signal from the ETACS-ECU (three times
or more in one second).
The diagnosis code is erased when the column switch continues to send a
signal according to the transmission request signal from the ETACS-ECU for
one second.
D Malfunction of column switch
D Malfunction of ETACS-ECU
D Malfunction of wiring harness or connector
Is diagnosis code No. 12 output
when the ignition switch is at the
ON position?
No
Measure at column switch connector
C-63.
D Disconnect connector and
measure at harness side.
D Voltage between terminal 1 and
body earth.
OK: System voltage
NG
Check the following connectors:
C-01, C-63, C-72, C-75
NG
Check the harness wire between col-
umn switch and fusible link (3).
OK
Check trouble symptoms
NG
Repair
OK
Measure at column switch connector
C-63.
D Disconnect connector and
measure at harness side.
D Continuity between terminal 4
and body earth.
OK: Continuity
OK
Check the following connectors:
C-02, C-63, C-83
OK
NG
Repair
NG
Check the harness wire between col-
umn switch and ETACS-ECU.
OK
Check trouble symptoms
NG
Replace the column switch or ETACS-
ECU.
NG
Check the following connectors:
C-01, C-63
NG
Replace
OK
Check trouble symptoms
NG
Check the harness wire between col-
umn switch and body earth.
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