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Home >> Mazda >> 2012 >> 6 s Touring Plus >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> On-Board Diagnostic [Advanced Keyless Entry System And Push Button Start System] >> DTC B11FD:1F [Advanced Keyless Entry And Push Button Start System] >> Diagnostic Procedure
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Diagnostic Procedure

Step Inspection Action
1 INSPECT FRONT OUTER HANDLE (LH) CONNECTOR CONDITION 
  • 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.
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 6.
No Go to the next step.
3 INSPECT KEYLESS ANTENNA (EXTERIOR, LF) CIRCUIT FOR SHORT TO GROUND 
  • Inspect for continuity between the following terminals and body ground:
    • Front outer handle (LH) terminal B (wiring harness-side)
    • Front outer handle (LH) terminal E (wiring harness-side)
  • Is there continuity?
Yes Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
No Go to the next step.
4 INSPECT KEYLESS ANTENNA (EXTERIOR, LF) CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Reconnect the negative battery cable.
  • Switch the ignition to ON.
  • Measure the voltage between the following terminals and body ground:
    • Front outer handle (LH) terminal B (wiring harness-side)
    • Front outer handle (LH) terminal E (wiring harness-side)
  • Is there any voltage?
Yes Repair or replace the wiring harness for a possible short to power supply, then go to Step 6.
No Go to the next step.
5 INSPECT KEYLESS ANTENNA (EXTERIOR, LF) CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between the following terminals:
    • Front outer handle (LH) terminal B (wiring harness-side) and keyless control module terminal 3F (wiring harness-side)
    • Front outer handle (LH) terminal E (wiring harness-side) and keyless control module terminal 3AB (wiring harness-side)
  • Is there continuity?
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open circuit, then go to the next step.
6 PERFORM DTC INSPECTION 
Yes Replace the keyless antenna (exterior, LF), then go to the next step.
(See KEYLESS ANTENNA REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
No Go to Step 8.
7 VERIFY TROUBLESHOOTING COMPLETED 
Yes Repeat the inspection from Step 1.
If the malfunction recurs, replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
No Go to the next step.
8 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] .)
No DTC troubleshooting completed.