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The immobilizer ECU communicates with the
M.U.T.-III via the engine-ECU <M/T> or the
engine-A/T-ECU. The communication error between the immobilizer ECU
and the engine-ECU <M/T> or the engine-A/T-ECU may
be occurred.
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- Malfunction of immobilizer ECU power supply and earth
- Damaged harness wires between the engine-ECU <M/T>
or the engine-A/T-ECU and the immobilizer ECU
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![](../../../img/54/AC310615AS00ENG.png)
![](../../../img/54/AC310628AW00ENG.png)
![](../../../img/54/AC310153AE00ENG.png)
![](../../../img/54/AC310183AE00ENG.png)
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Q.
Are key reminder switch connector C-308 and engine-ECU
<M/T> or engine-A/T-ECU <A/T>
connector C-112 in good condition?
Go to Step 2.
Repair the defective
connector.
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![](../../../img/54/AC310616AF00ENG.png)
![](../../../img/54/AC310629AD00ENG.png)
![](../../../img/54/AC310153AE00ENG.png)
![](../../../img/54/AC310183AE00ENG.png)
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note |
Prior to the wiring harness inspection, check
intermediate connector C-17, and repair if necessary.
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Q.
Are the harness wires between key reminder switch connector C-308
(terminal 7) and engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector C-112 (terminal 65)
in good condition?
Go to Step 3.
Repair the wiring
harness.
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Q.
Is the check result normal?
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Repair
the power supply and earth circuit to the immobilizer ECU.
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Check that immobilizer ECU communicates with
the M.U.T.-III.
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Q.
Is the check result normal?
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Intermittent Malfunction (Refer to
GROUP 00 - How to Use Troubleshooting/Inspection Service Points
- How to Cope with Intermittent Malfunctions .)
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Replace the immobilizer ECU, and
then go to Step 5.
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Check that immobilizer ECU communicates with
the M.U.T.-III.
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Q.
Is the check result normal?
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The
procedure is complete.
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Replace the engine-ECU
<M/T> or engine-A/T-ECU
<A/T>.
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