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HOMESERVICE MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSON-BOARD DIAGNOSTIC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]DTC B10C6:1F [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

2011 Mazda 3 Mazdaspeed, 2.3 3

DTC B10C6:1F [Advanced Keyless Entry And Push Button Start System]

2011 Mazda 3 Mazdaspeed, 2.3 3SECTION DTC B10C6:1F [Advanced Keyless Entry And Push Button Start System]

DESCRIPTION	Erratic signal of keyless antenna (exterior, rear)
DETECTION CONDITION	Keyless control module detects the open circuit in keyless antenna (exterior, rear) circuit.
POSSIBLE CAUSE	Keyless antenna (exterior, rear) connector or terminals malfunction Keyless control module connector or terminals malfunction Short to ground in the wiring harness between the following terminals: Keyless antenna (exterior, rear) terminal A-Keyless control module terminal 4C Keyless antenna (exterior, rear) terminal B-Keyless control module terminal 4F Open circuit in the wiring harness between the following terminals: Keyless antenna (exterior, rear) terminal A-Keyless control module terminal 4C Keyless antenna (exterior, rear) terminal B-Keyless control module terminal 4F Keyless antenna (exterior, rear) malfunction Keyless control module malfunction

DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT KEYLESS ANTENNA (EXTERIOR, REAR) CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the keyless antenna (exterior, rear) 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, REAR) CIRCUIT FOR SHORT TO GROUND Keyless antenna (exterior, rear) and keyless control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Keyless antenna (exterior, rear) terminal A Keyless antenna (exterior, rear) 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, REAR) CIRCUIT FOR OPEN CIRCUIT Keyless antenna (exterior, rear) and keyless control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Keyless antenna (exterior, rear) terminal A-Keyless control module terminal 4C Keyless antenna (exterior, rear) terminal B-Keyless control module terminal 4F 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	VERIFY KEYLESS ANTENNA (EXTERIOR, REAR) 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, rear), 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.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.