|
The power supply circuit to the
column switch (column-ECU) may be defective. If the wiring
harness of the battery power supply circuit for the ECU
(column switch terminal No.1) is defective,
also check the power supply circuit to the ignition switch
(IG1) (column switch terminal No.9)
and repair if necessary.
|
|
- Malfunction of the ETACS-ECU
- Malfunction of the column switch
- Damaged harness wires and connectors
|
|
Check that the power supply and
earth lines to the ETACS-ECU and the SWS communication
lines are normal.
|
|
OK: "OK" is displayed on
the "ETACS ECU" menu.
|
|
Q.
Is the check result normal?
|
|
Refer to Inspection
Procedure A-3 "Communication with the ETACS-ECU is not
possible ."
|
|
|
![](../../../img/54/AC313423AB00ENG.png)
|
Q.
Is the check result normal?
Go to Step
3.
Repair
the defective connector.
|
![](../../../img/54/AC313423AB00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side.
|
![](../../../img/54/AC310507BO00ENG.png)
|
(2)Voltage between C-301 column
switch connector No.1 and body earth OK: System
voltage
Q.
Is the check result normal?
Go to Step
5.
Go to Step
4.
|
![](../../../img/54/AC313414AD00ENG.png)
|
note |
Prior to the wiring harness
inspection, check intermediate connectors C-125,
and repair
if necessary.
|
- Check the power supply line for open
circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
Repair the wiring
harness.
|
![](../../../img/54/AC313423AB00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side.
|
![](../../../img/54/AC310506BD00ENG.png)
|
(2)Continuity between C-301 column
switch connector No.4 and body earth OK: 2
Ω or less
Q.
Is the check result normal?
Go to Step
7.
Go to Step
6.
|
![](../../../img/54/AC313423AB00ENG.png)
|
- Check the earth wires for open circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
Repair the wiring
harness.
|
![](../../../img/54/AC313421AB00ENG.png)
|
Q.
Is the check result normal?
Go to Step
8.
Repair
the defective connector.
|
![](../../../img/54/AC313416AD00ENG.png)
|
note |
Prior to the wiring harness
inspection, check joint connector C-01, and
repair if necessary.
|
- Check the communication lines for open
circuit.
Q.
Is the check result normal?
Go to Step
9.
Repair
the wiring harness.
|
|
OK: "OK" is displayed on
the "COLUMN ECU" menu.
|
|
Q.
Is the check result normal?
|
|
Replace the column
switch.
|
|
|
|
Check that the ETACS-ECU
communicates with the column switch.
|
|
Q.
Is the check result normal?
|
|
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
|
|
|