Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT COIL ANTENNA CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the coil antenna connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
1		No	Go to the next step.
2	INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS Disconnect the instrument cluster connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
2		No	Go to the next step.
3	VERIFY WHETHER THERE IS A VALID KEY Are there any valid keys which can start the engine other than the cause of the displayed DTC?	Yes	Go to the next step.
3		No	Program an additional key referring to the immobilizer system-related parts programming, then go to the next step. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING .)
4	PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS COIL ANTENNA Make sure to reconnect all disconnected connectors. Reconnect the negative battery cable. Clear the DTC using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM] .) Perform the immobilizer system DTC inspection using the M-MDS using the valid key other than the cause of the displayed DTC. (See DTC INSPECTION [IMMOBILIZER SYSTEM] .) Is the same DTC present?	Yes	Replace the coil antenna, then go to the next step. (See COIL ANTENNA REMOVAL/INSTALLATION .)
4		No	Dispose of the malfunctioning key and program a new key if necessary, then go to Step 7. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING .)
5	PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS INSTRUMENT CLUSTER Clear the DTC using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM] .) Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM] .) Is the same DTC present?	Yes	Replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5		No	Go to Step 7.
6	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Reconnect the negative battery cable. Clear the DTC using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM] .) Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.5] .) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM] .)
7		No	DTC troubleshooting completed.