Diagnosis code
No.02 Communication error with column switch
|
caution |
If diagnosis code No.02 is set
in the ETACS-ECU, diagnose the CAN bus
lines.
|
|
|
The ETACS-ECU communicates with the
column switch through the SWS communication lines.
If there is any trouble in that communication, diagnosis
code No.02 will be set.
|
|
COMMENT ON TROUBLE SYMPTOM
|
|
The column switch, the ETACS-ECU,
connector(s), or wiring harness between the two may
be defective.
|
|
- Malfunction of the column switch
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
|
|
Step 1. M.U.T.-III CAN bus diagnostics
|
|
Use the M.U.T.-III to diagnose the
CAN bus lines.
|
|
Q.
Is the check result normal?
|
|
Go to Step
2.
|
|
|
|
Repair the CAN bus
line (Refer to GROUP 54F - Troubleshooting ).
|
|
|
|
Step 2. Use the M.U.T.-III to confirm a diagnosis code.
(M.U.T.-III diagnosis
code)
|
|
(2)On completion, check that diagnosis code No.02 is
not reset.
|
|
Q.
Is diagnosis code No.02 set?
|
|
Go to Step
6.
|
|
|
|
Go to Step
3.
|
|
|
|
Step 3. Connector check: C-301 column switch
connector
|
![](../../../img/54/AC313402AB00ENG.png)
![](../../../img/54/AC313412AB00ENG.png)
|
Q.
Is the check result normal?
Go to Step
4.
Repair
the defective connector.
|
|
Step 4. Voltage measurement at the C-301 column switch
connector.
|
![](../../../img/54/AC313402AB00ENG.png)
![](../../../img/54/AC313412AB00ENG.png)
|
(1)Remove the column switch, and
measure at the wiring harness side.
|
![](../../../img/54/AC310507BO00ENG.png)
|
(2)Voltage between C-301 column
switch connector terminal No.1 and body
earth OK: System voltage
Q.
Is the check result normal?
Replace the column
switch.
Go to Step
5.
|
|
Step 5. Check the wiring harness between C-301 column
switch connector
terminal No.1 and the fusible link (26).
|
![](../../../img/54/AC313406AF00ENG.png)
![](../../../img/54/AC313393AI00ENG.png)
![](../../../img/54/AC313404AK00ENG.png)
|
note |
Prior to the wiring harness
inspection, check intermediate connector C-125
and joint connector
C-32 <LH drive vehicles>, C-31
<RH drive vehicles> 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.
|
|
Step 6. Resistance measurement at the C-301 column
switch connector.
|
![](../../../img/54/AC313402AB00ENG.png)
![](../../../img/54/AC313412AB00ENG.png)
|
(1)Remove the column switch, and
measure at the wiring harness side.
|
![](../../../img/54/AC310506BD00ENG.png)
|
(2)Continuity between C-301 column
switch connector terminal No.4 and body
earth OK: 2 Ω or less
Q.
Is the check result normal?
Go to Step
8.
Go to Step
7.
|
|
Step 7. Check the wiring harness between C-301 column
switch connector
terminal No.4 and the body earth.
|
![](../../../img/54/AC313402AB00ENG.png)
![](../../../img/54/AC313412AB00ENG.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.
|
|
Step 8. Connector check: C-221 ETACS-ECU
connector
|
![](../../../img/54/AC313400AB00ENG.png)
![](../../../img/54/AC313410AB00ENG.png)
|
Q.
Is the check result normal?
Go to Step
9.
Repair
the defective connector.
|
|
Step 9. Check the wiring harness from C-221 ETACS-ECU
connector terminal
Nos. 59 and 68 to C-301 column switch connector terminal
Nos. 3 and 2.
|
![](../../../img/54/AC313392AG00ENG.png)
![](../../../img/54/AC313406AL00ENG.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
10.
Repair
the wiring harness.
|
|
Step 10. Check whether the diagnosis code is
reset.
|
|
Replace the column switch, and then
check that the diagnosis code is not reset.
|
|
(1)Replace the column switch.
|
|
(3)On completion, check that diagnosis code No.02 is
not reset.
|
|
Q.
Is diagnosis code No.02 set?
|
|
Replace the
ETACS-ECU.
|
|
|
|
The procedure is
complete.
|
|
|