Diagnostic Procedure

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC B11FD:1F (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT FRONT OUTER HANDLE (LH) CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the front outer handle (LH) 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 KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS 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 6.
2		No	Go to the next step.
3	INSPECT KEYLESS ANTENNA (EXTERIOR, LF) CIRCUIT FOR SHORT TO GROUND Front outer handle (LH) and keyless control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Front outer handle (LH) terminal E Front outer handle (LH) terminal B Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
3		No	Go to the next step.
4	INSPECT KEYLESS ANTENNA (EXTERIOR, LF) CIRCUIT FOR OPEN CIRCUIT Front outer handle (LH) and keyless control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Front outer handle (LH) terminal E- Keyless control module terminal 4B Front outer handle (LH) terminal B- Keyless control module terminal 4E 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 6.
5	INSPECT KEYLESS ANTENNA (EXTERIOR, LF) MALFUNCTION Make sure to reconnect the disconnected connectors. Reconnect the negative battery cable. Open any door or trunk/liftgate, then close all doors or the trunk/liftgate with the ignition switched off. Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Open any door or trunk/liftgate, then close all doors or the trunk/liftgate with the ignition switched off. Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Is the same DTC present?	Yes	Replace the keyless antenna (exterior, LF), then go to the next step. (See KEYLESS ANTENNA REMOVAL/INSTALLATION .)
5		No	Go to Step 7.
6	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect the disconnected connectors. Reconnect the negative battery cable. Open any door or trunk/liftgate, then close all doors or the trunk/liftgate with the ignition switched off. Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Open any door or trunk/liftgate, then close all doors or the trunk/liftgate with the ignition switched off. Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Is the same DTC present?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION .)
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 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
7		No	DTC troubleshooting completed.