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 COIL ANTENNA CONNECTOR CONDITION 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 4.
1		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION Disconnect the keyless control module 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 4.
2		No	Go to the next step
3	INSPECT COIL ANTENNA POWER SUPPLY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground Coil antenna terminal H (wiring harness-side) Coil antenna terminal A (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to the next step
3		No	Go to the next step
4	PERFORM DTC INSPECTION Reconnect the disconnected connectors. Reconnect the negative battery cable. Clear the DTC from the keyless control module and PCM memory using the M-MDS See CLEARING DTC [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] . Perform the immobilizer system (advanced keyless entry and push button start system) DTC inspection using the M-MDS See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ) Is the same DTC present?	Yes	Replace the coil antenna, then go to the next step. See COIL ANTENNA REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .
4		No	Go to Step 6.
5	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC from the keyless control module and PCM memory using the M-MDS See CLEARING DTC [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ) Perform the immobilizer system (advanced keyless entry and push button start system) DTC inspection using the M-MDS See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ) Is the same DTC present?	Yes	Replace the keyless control module and program the immobilizer system-related parts, then go to the next step. See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] . See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .
5		No	Go to the next step.
6	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] )
6		No	DTC troubleshooting completed.