Diagnostic Procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT METER 15 A FUSE Switch the ignition to off. Disconnect the negative battery cable. Remove the METER 15 A fuse. Is there any malfunction?	Yes	Replace the fuse, then go to Step 7.
1		No	Go to the next step.
2	INSPECT COIL ANTENNA CONNECTOR CONDITION 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 7.
2		No	Go to the next step.
3	INSPECT COIL ANTENNA POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Install the METER 15 A fuse. Reconnect the negative battery cable. Switch the ignition to ON (engine off). Measure the voltage between coil antenna terminal H (wiring harness-side) and body ground. Is the voltage 8 V or more?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 7.
4	INSPECT COIL ANTENNA GROUND CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off. Disconnect the negative battery cable. Inspect for continuity between coil antenna terminal F (wiring harness-side) and body ground Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
5	INSPECT INSTRUMENT CLUSTER CONNECTOR CONDITION 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 7.
5		No	Go to the next step.
6	INSPECT COIL ANTENNA COMMUNICATION CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between the following terminals: Coil antenna terminal D (wiring harness-side) and instrument cluster terminal 2G (wiring harness-side) Coil antenna terminal C (wiring harness-side) and instrument cluster terminal 2E (wiring harness-side) Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
7	PERFORM DTC INSPECTION Reconnect the disconnected connectors. Reconnect the negative battery cable. Clear the DTC from the instrument cluster and PCM memory using the M-MDS See CLEARING DTC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] . Perform the immobilizer system (keyless entry system) DTC inspection using the M-MDS. See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] . Is the same DTC present?	Yes	Replace the coil antenna, then go to the next step. See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM] .
7		No	Go to Step 9.
8	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC from the instrument cluster and PCM memory using the M-MDS. See CLEARING DTC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] . Perform the immobilizer system (keyless entry system) DTC inspection using the M-MDS. See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] . Is the same DTC present?	Yes	Replace the instrument cluster and program the immobilizer system-related parts, then go to the next step. See INSTRUMENT CLUSTER REMOVAL/INSTALLATION . See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [KEYLESS ENTRY SYSTEM] .
8		No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .
9		No	DTC troubleshooting completed.