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If only some ignition keys cannot be
registered, the ignition key itself may be defective. If no ignition key
can be registered, the immobilizer ECU may be defective.
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- Malfunction of ignition key
- Damaged harness wires and connectors
- Malfunction of immobilizer ECU
- Malfunction of engine-ECU <M/T> or
engine-A/T-ECU <A/T>
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Q.
Can any of the ignition keys be registered?
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Replace the ignition key that cannot
be registered with new registered ignition key.
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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 3.
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 4.
Repair the wiring
harness.
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Q.
Can the system communicate with the M.U.T.-III?
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Refer
to INSPECTION PROCEDURE 1 "MPI system-related diagnostic code No.54
<except vehicles for Hong Kong and Singapore> or No.P0513
<vehicles for Hong Kong and Singapore> is set, and
communication between M.U.T.-III and immobilizer cannot be established. "
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Check whether the engine immobilizer
system-related diagnosis code is set.
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Q.
Is the diagnosis code set?
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Check that the ignition key can be
registered.
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Q.
Is the check result normal?
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The
procedure is complete.
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Replace the immobilizer ECU, and
then go to Step 7 .
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Check that the ignition key can be
registered.
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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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