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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 key assembly may have already been registered for another vehicle, or the ETACS-ECU may be defective.
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- Malfunction of ignition key
- Damaged harness wires and connectors
- Malfunction of ETACS-ECU
- Malfunction of engine-ECU
- Transponder registered for other vehicle
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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 54C - Troubleshooting). Repair the CAN bus line.
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Q.
Are there other ignition keys or anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the ignition key inserted in the key cylinder?
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Move away or remove other ignition keys or things that interfere with the communication (things that generate radio waves such as magnets and a air-cleaning device that has a power plug) near the ignition key. Then, go to Step 3.
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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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Q.
Are there only some ignition keys that cannot be registered?
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Only some keys : Replace the key that cannot be registered and register the ID codes (Refer to ). After registering the ID codes, go to Step 6.
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Check the M.U.T.-III screen when the key was not able to be registered.
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Q.
Which error message did the M.U.T.-III display?
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Defective key : Carry out the troubleshooting for diagnosis code B1722 "Immobilizer-antenna fail" (Refer to ). Then, go to Step 6.
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ECU internal error : Replace the ETACS-ECU (Refer to ). After registering the ID codes, go to Step 6.
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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 ETACS-ECU (Refer to ). After registering the ID codes.
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