Code No.79: Side
impact sensor (LH) communication error
Code No.93: Side impact sensor
(LH) communication
impossible
![](../../../img/52/W4X52X006A00ENG.png)
OPERATION
The side impact sensor (front) includes an analog G
sensor and CPU, etc. The CPU monitors the
analog G sensor output signal. If the CPU judges that the side-airbags should
be deployed, it
sends a fire signal to the SRS-ECU to deploy the side-airbags. Besides that,
the CPU diagnoses
the internal components of the side impact sensor (front). If a malfunction
occurs, it requests
the SRS-ECU to set a diagnosis code.
DIAGNOSIS CODE SET CONDITIONS
These diagnosis codes are set if
communication between the side impact sensor (LH) and
the SRS-ECU is not possible or communication is faulty.
PROBABLE CAUSES
- Damaged wiring harnesses or connectors
- Malfunction of the side impact sensor (LH)
- Malfunction of the SRS-ECU
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STEP 1. Check the side impact sensor (LH) (M.U.T.-III diagnosis
code).
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(1)Disconnect the negative battery terminal.
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(2)Replace the side impact sensor (LH) with the side impact
sensor (RH).
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(3)Connect the negative battery terminal.
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(4)Erase diagnosis code memory, and check the diagnosis
code.
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Q.
Is diagnosis code 89 or 96 set?
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Replace the side impact sensor (LH)
with a new one (Refer to ).
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Go to Step 2.
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STEP 2. Check the harness wires for open circuit or short circuit
between SRS-ECU connector C-146 (terminal No.34 and 36) and side impact
sensor (LH) connector
D-18 (terminal No.1 and 2).
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![](../../../img/52/AC311438AG00ENG.png)
![](../../../img/52/AC313429AO00ENG.png)
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Q.
Is the check result normal?
Go to Step 3.
Repair the harness wires between
SRS-ECU connector C-146 (terminal No.34 and 36)
and side impact sensor (LH) connector D-18 (terminal No.1 and
2).
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STEP 3. Check whether the diagnosis code is reset.
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Q.
Is diagnosis code 79 or 93 set?
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Replace the SRS-ECU (Refer to ).
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An
intermittent malfunction is suspected (Refer to GROUP 00, How to Use
Troubleshooting/Inspection
Service Points ).
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