Code No.67: Steering Wheel Sensor Communication Line Error
caution |
If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Diagnose the CAN bus lines before the
diagnosis codes (Refer to GROUP 54D, CAN bus-line diagnostic flow ).
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![](../../../img/35/AC608372AA00ENG.png)
![](../../../img/35/AC607562CQ00ENG.png)
![](../../../img/35/AC607570AT00ENG.png)
![](../../../img/35/AC607569AE00ENG.png)
![](../../../img/35/AC607566AB00ENG.png)
![](../../../img/35/AC607597AB00ENG.png)
![](../../../img/35/AC607567AE00ENG.png)
![](../../../img/35/AC607609AE00ENG.png)
OPERATION
The ASTC-ECU gathers information regarding the steering
operation, through the CAN bus line from the steering wheel sensor.
DIAGNOSIS CODE SET CONDITIONS
Diagnosis code No. 67 is set when
all communication data are not sent from the steering wheel sensor to
ASTC-ECU.
PROBABLE CAUSES
The most likely causes for these diagnosis codes
to set are:
- Damaged wiring harness or connector
- Malfunction of the steering wheel sensor
- Malfunction of the ASTC-ECU
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STEP 1. M.U.T.-III CAN bus diagnostics
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caution |
Before connecting or disconnecting the M.U.T.-III,
turn the ignition switch to the "LOCK" (OFF) position.
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(1)Connect M.U.T.-III to the 16-pin diagnosis
connector.
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(2)Turn the ignition switch to the "ON" position.
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(3)Diagnose the CAN bus line.
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(4)Turn the ignition switch to the "LOCK" (OFF)
position.
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Q.
Is the check result normal?
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Go to Step 3.
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Repair the CAN bus line (Refer to
GROUP 54D, CAN bus line Diagnostic flow ). Then go to Step 2.
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STEP 2. Check whether the diagnosis code is reset.
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caution |
Before connecting or disconnecting the M.U.T.-III,
turn the ignition switch to the "LOCK" (OFF) position.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF)
position.
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(4)Turn the ignition switch to the "ON" position.
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(5)Check if the diagnosis code is set.
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(6)Turn the ignition switch to the "LOCK" (OFF)
position.
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Go to Step 3.
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The
procedure is complete.
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STEP 3. Check the M.U.T.-III data list.
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(1)Turn the ignition switch to the "ON" position.
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(3)Check that the data list output changes within the
following range when the steering wheel is rotated.
- Item 32: Steering wheel operation
OK: Approximately the same value as turning angle of steering
wheel is displayed
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 4.
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STEP 4. Check steering wheel sensor connector D-308, intermediate
connector D-241, joint connector D-34, junction block connector D-403 and
junction block connector D-405 for loose, corroded or damaged terminals,
or terminals pushed back in the connector.
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Q.
Is the check result normal?
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Go to Step 5.
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Repair or replace the damaged
component(s). Then go to Step 9.
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STEP 5. Check fuses No. 12 and 18.
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Q.
Is the check result normal?
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Go to Step 6.
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Replace fuse No. 12 or 18. Then
go to Step 9.
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STEP 6. Check the power supply circuit at steering wheel sensor
connector D-308.
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(1)Disconnect steering wheel sensor connector D-308, and
measure at the harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure voltage between terminal 1 and
earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 7.
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Repair the wiring harness between
the steering wheel sensor connector D-308 and the ignition switch (IG2).
Then go to Step 9.
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STEP 7. Check the earth circuit at steering wheel sensor connector
D-308.
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(1)Disconnect steering wheel sensor connector D-308, and
measure at the harness side.
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(2)Measure the resistance between terminal 5 and
earth. OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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Repair the wiring harness between
the steering wheel sensor connector D-308 and earth. Then go to Step
9.
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Replace the steering wheel
sensor. Then go to Step 8.
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STEP 8. Check whether the diagnosis code is reset.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF)
position.
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(4)Turn the ignition switch to the "ON" position.
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(5)Check if the diagnosis code is set.
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(6)Turn the ignition switch to the "LOCK" (OFF)
position.
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Replace the ASTC-ECU. Then go to
Step 9.
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It can
be assumed that this malfunction is intermittent. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How to Cope
with Intermittent Malfunction .
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STEP 9. Check whether the diagnosis code is reset.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF)
position.
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(4)Turn the ignition switch to the "ON" position.
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(5)Check if the diagnosis code is set.
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(6)Turn the ignition switch to the "LOCK" (OFF)
position.
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Repeat the troubleshooting from
Step 1.
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The
procedure is complete.
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