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CHASSIS ELECTRICAL - Ignition Switch and Immobilizer System 54A-9 Inspection procedure 2 The ignition keys cannot be registered using the MUT-II. Probable cause The ignition key has not been registered with the immobilizer-ECU. Or that there is a problem with the immobilizer-ECU. D Malfunction of ignition key D Malfunction of harness or connector D Malfunction of immobilizer-ECU Register the ignition key. YES NO YES Is a normal diagnosis code output? NO Can none of the ignition keys be registered? Replace the ignition key that cannot be registered. To Chart Classified by Diagnosis Codes (Refer to P.54A-6.) OK Immobilizer-ECU power supply and earth circuit system check (Refer to Inspection Procedure 4.) NG Replace the immobilizer-ECU. Check the trouble symptoms. Inspection procedure 3 The engine does not start. (The engine cranks but does not fire.) Probable cause If the fuel injection does not operate, the cause is probably a problem with the immobilizer-ECU, or it could also be a problem with the MPI system. If an attempt has been made to start the engine with a key that has not been properly registered, the above symptom is a sign of normal operation. D Malfunction of MPI system. D Malfunction of immobilizer-ECU NG Battery check (Refer to P.54A-4) YES NO Refer to GROUP 13A - Troubleshooting. YES NO To Chart Classified by Diagnosis Codes (Refer to P.54A-6.) Is a normal diagnosis code output from the immobilizer-ECU? OK Voltage check during cranking OK: 8 V or higher Is a normal diagnosis code output by the engine-ECU? NG OK Immobilizer-ECU power supply and earth circuit system check (Refer to Inspection Procedure 4.) NG Replace the immobilizer-ECU. Check the trouble symptoms. Check the trouble symptoms. NG To inspection procedures if the engine does not fire (Refer to GROUP 13A - Troubleshooting.) |