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Input signal from the
driver’s seat belt switch signal is used to operate
the
seat belt warning buzzer function and seat belt warning
lamp. If the signal is abnormal, the
seat belt warning buzzer function and seat belt warning lamp
will not work normally.
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- Malfunction of the driver’s seat belt
switch
- Malfunction of the ETACS-ECU
- Malfunction of the combination meter
- Damaged harness wires and connectors
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Use the M.U.T.-III to diagnose the
CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus
line (Refer to GROUP 54F - Troubleshooting ).
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Check whether the combination
meter-related diagnosis code is set.
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Q.
Is the diagnosis code set?
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Diagnose the
combination meter (Refer to GROUP 54A - Combination
meter ).
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![](../../../img/54/AC313427AN00ENG.png)
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Q.
Is the check result normal?
Go to Step
4.
Repair
the defective connector.
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Refer to GROUP 52A - Front
seat belt .
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Q.
Is the check result normal?
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Replace the inner
seat belt (driver’s side).
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![](../../../img/54/AC313427AN00ENG.png)
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(1)Disconnect the connector, and
measure at the wiring harness side.
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![](../../../img/54/AC312730AP00ENG.png)
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(2)Resistance between D-26 seat
belt switch (RH) connector terminal No.2 and body
earth OK: 2 Ω or less
Q.
Is the check result normal?
Go to Step
7.
Go to Step
6.
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![](../../../img/54/AC313427AN00ENG.png)
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- Check the earth wires for open circuit.
Q.
Is the check result normal?
Replace the inner
seat belt (driver’s side).
Repair the wiring
harness.
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![](../../../img/54/AC313406BC00ENG.png)
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Q.
Is the check result normal?
Go to Step
8.
Repair
the defective connector.
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![](../../../img/54/AC313406BA00ENG.png)
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note |
Prior to the wiring harness
inspection, check intermediate connector C-16,
and repair
if necessary.
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- Check the input line for open circuit.
Q.
Is the check result normal?
Go to Step
9.
Repair
the wiring harness.
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|
After the ETACS-ECU is replaced,
check that the driver’s seat belt switch signal
is received.
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(1)Replace the ETACS-ECU.
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(2)Check that the driver’s seat belt switch
signal is received.
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Q.
Is the check result normal?
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|
The trouble can be
an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction ).
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Replace the
combination meter.
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