Inspection Procedure 3: The ignition key cannot be registered with the M.U.T.-III. <3800>
CIRCUIT OPERATION
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- Malfunction of ignition key
- Damaged harness wires and connectors
- Malfunction of immobilizer-ECU
- Malfunction of engine-A/T-ECU
DIAGNOSIS PROCEDURE |
STEP 1. Check that no ignition key can be registered. |
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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Go to Step 2. |
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STEP 2. Connector check: D-310 key reminder switch connector and D-216 engine-A/T-ECU connector |
Q.
Is the check result normal?
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Go to Step 3. |
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Repair the defective connector. |
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STEP 3. Check the harness wires between D-310 key reminder switch connector terminal No.7 and D-216 engine-A/T-ECU connector terminal No.65. |
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Q.
Is the check result normal?
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Go to Step 4. |
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Repair the wiring harness. |
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STEP 4. Check the communication with M.U.T.-III |
Q.
Can the system communicate with the M.U.T.-III?
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Go to Step 5. |
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Refer to Inspection Procedure 1 "MPI system-related diagnostic code No.P0513 is set, and communication between M.U.T.-III and immobilizer cannot be established ". |
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STEP 5. M.U.T.-III diagnosis code |
Check whether the engine immobilizer system-related diagnosis code is set. |
Q.
Is the diagnosis code set?
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Refer to . |
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Go to Step 6. |
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STEP 6. Retest the system. |
Check that the ignition key can be registered. |
Q.
Is the check result normal?
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The procedure is complete. |
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Replace the immobilizer-ECU and register the ignition key (Refer to ). Then go to Step 7. |
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STEP 7. Retest the system. |
Check that the ignition key can be registered. |
Q.
Is the check result normal?
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The procedure is complete. |
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Replace the engine-A/T-ECU and register the ignition key (Refer to ). |
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